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plc memory - 14.12 DOOR T4:0/TT TON T4:0 delay 10s T4:0/TT LIGHT Figure 14.14 Door Light Example 14.4.3 PLC Status Bits (for PLC-5s and Micrologix) Status memory allows a program to check the PLC operation, and also make some changes. A selected list of status bits is shown in Figure 14.15 for Allen-Bradley Micrologic and PLC-5 PLCs. More complete lists are available in the manuals. For example the first four bits S2:0/x indicate the results of calculations, including carry, overflow, zero and negative/sign. The S2:1/15 will be true once when the PLC is turned on - this is the first scan bit. The time for the last scan will be stored in S2:8. The date and clock can be stored and read from locations S2:18 to S2:23.
plc memory - 14.13 S2:0/0 carry in math operation S2:0/1 overflow in math operation S2:0/2 zero in math operation S2:0/3 sign in math operation S2:1/15 first scan of program file S2:8 the scan time (ms) S2:18 year S2:19 month S2:20 day S2:21 hour S2:22 minute S2:23 second S2:28 watchdog setpoint S2:29 fault routine file number S2:30 STI (selectable timed interrupt) setpoint S2:31 STI file number S2:46-S2:54,S2:55-S2:56 PII (Programmable Input Interrupt) settings S2:55 STI last scan time (ms) S2:77 communication scan time (ms) Figure 14.15 Status Bits and Words for Micrologix and PLC-5s The other status words allow more complex control of the PLC. The watchdog timer allows a time to be set in S2:28 so that if the PLC scan time is too long the PLC will give a fault condition - this is very important for dangerous processes. When a fault occurs the program number in S2:29 will run. For example, if you have a divide by zero fault, you can run a program that recovers from the error, if there is no program the PLC will halt. The locations from S2:30 to S2:55 are used for interrupts. Interrupts can be used to run programs at fixed time intervals, or when inputs change. 14.4.4 User Function Control Memory Simple ladder logic functions can complete operations in a single scan of ladder logic. Other functions such as timers and counters will require multiple ladder logic scans to finish. While timers and counters have their own memory for control, a generic type of control memory is defined for other function. This memory contains the bits and words in Figure 14.16. Any given function will only use some of the values. The meaning of particular bits and words will be described later when discussing specific functions.
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ST1 B T2 A T1 C*B T3 page 0 ST3 T4
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page i 1.1 TODO LIST 1.4 2. PROGRAM
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page iii 7.4 PRACTICE PROBLEM SOLUT
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page v 14.2 MEMORY ADDRESSES 14.1 1
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page vii 20.3 SUMMARY 20.16 20.4 PR
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page ix 25.2 CONTROL OF LOGICAL ACT
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page xi 30.1 INTRODUCTION 30.1 30.2
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page xiii 35.21 U 35.28 35.22 V 35.
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plc wiring - 1.2 tougher, and the p
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plc wiring - 1.4 This book supports
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plc wiring - 2.2 logic diagrams was
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plc wiring - 2.4 115VAC wall plug r
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plc wiring - 2.6 A B B Note: When A
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plc wiring - 2.8 number there. The
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plc wiring - 2.10 2.1.3 PLC Connect
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plc wiring - 2.12 2.1.5 Ladder Logi
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plc wiring - 2.14 Solution: There a
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plc wiring - 2.16 4. Less expensive
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plc wiring - 3.2 quantities of I/O
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plc wiring - 3.4 5 Vdc (TTL) 200-24
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plc wiring - 3.6 There are many tra
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plc wiring - 3.8 ASIDE: PLC outputs
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plc wiring - 3.10 24 V DC Output Ca
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plc wiring - 3.12 put card directly
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plc wiring - 3.14 3.4 A CASE STUDY
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plc wiring - 3.16 L1 N 010 020 stop
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plc wiring - 3.18 disconnect circui
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plc wiring - 3.20 Resistor Tapped R
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plc wiring - 3.22 program. 200 201
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plc wiring - 3.24 3.8 PRACTICE PROB
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plc wiring - 3.26 14. 24Vdc + - 1 c
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plc wiring - 3.28 button inputs. b)
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discrete sensors - 4.2 puts from se
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discrete sensors - 4.4 term sourcin
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discrete sensors - 4.6 sensor V+ V+
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discrete sensors - 4.8 PLC Input Ca
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discrete sensors - 4.10 When purcha
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discrete sensors - 4.12 4.3.3 Optic
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discrete sensors - 4.14 In the figu
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discrete sensors - 4.16 effective b
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discrete sensors - 4.18 The optical
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discrete sensors - 4.20 C Ak = ----
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discrete sensors - 4.22 Material Co
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discrete sensors - 4.24 metal induc
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discrete sensors - 4.26 4.3.8 Fluid
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discrete sensors - 4.28 below. 00 0
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discrete sensors - 4.30 forget to i
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discrete sensors - 4.32 5. A transp
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discrete sensors - 4.34 7. 00 01 02
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discrete sensors - 4.36 9. L1 N sto
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discrete actuators - 5.1 5. LOGICAL
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discrete actuators - 5.3 Valve type
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discrete actuators - 5.5 F advancin
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discrete actuators - 5.7 Hydraulic
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discrete actuators - 5.9 Flow contr
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discrete actuators - 5.11 5.11 PRAC
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discrete actuators - 5.13
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plc boolean - 6.2 Note: By conventi
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plc boolean - 6.4 Idempotent A + A
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plc boolean - 6.6 6.3 LOGIC DESIGN
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plc boolean - 6.8 Ladder Logic for
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plc boolean - 6.10 der logic there
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plc boolean - 6.12 A = B⋅ C ⋅ (
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plc boolean - 6.14 A+ CA = A+ C pro
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plc boolean - 6.16 D1 D2 D3 multipl
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plc boolean - 6.18 Solution: D = A
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plc boolean - 6.20 The inputs and o
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plc boolean - 6.22 A = ( S⋅ M⋅
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plc boolean - 6.24 • Truth tables
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plc boolean - 6.26 b) Simplify the
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plc boolean - 6.28 2. A B D C 3. B
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plc boolean - 6.30 9. a) ( A+ B)
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plc boolean - 6.32 A B C B C D C A
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plc boolean - 6.34 17. D A Y 18. CA
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plc boolean - 6.36 c) A X B A C C A
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plc boolean - 6.38 algebra, and the
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plc karnaugh - 7.1 7. KARNAUGH MAPS
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plc karnaugh - 7.3 expression. The
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plc karnaugh - 7.5 7.3 PRACTICE PRO
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plc karnaugh - 7.7 5. Examine the t
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plc karnaugh - 7.9 Boolean equation
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plc karnaugh - 7.11 13. Consider th
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plc karnaugh - 7.13 5. 00 FG 01 11
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plc karnaugh - 7.15 9. CD AB AB A B
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plc karnaugh - 7.17 12. DA + ACD AB
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plc karnaugh - 7.19 4. Convert the
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plc operation - 8.2 inputs and outp
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plc operation - 8.4 input scan take
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plc operation - 8.6 8.3 PLC STATUS
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plc operation - 8.8 8.7 PRACTICE PR
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plc timers - 9.1 9. LATCHES, TIMERS
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plc timers - 9.3 The operation of t
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plc timers - 9.5 I/0 O/0 I/0 O/1 L
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plc timers - 9.7 oven has been turn
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plc timers - 9.9 value. The timer i
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plc timers - 9.11 I/1 TON T4:1 dela
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plc timers - 9.13 Start Stop Auto A
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plc timers - 9.15 CTU A Counter C5:
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plc timers - 9.17 The program in Fi
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plc timers - 9.19 9.6 INTERNAL RELA
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plc timers - 9.21 Solution: A T4:0/
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plc timers - 9.23 Solution: Motor S
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plc timers - 9.25 Solution: Go Stop
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plc timers - 9.27 Solution: TS1 LS1
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plc timers - 9.29 8. Complete the t
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plc timers - 9.31 17. Design a conv
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plc timers - 9.33 7. A RTF Timer T4
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plc timers - 9.35 9. input TON RTO
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plc timers - 9.37 14. I/1 T4:1/DN T
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plc timers - 9.39 16. left button T
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plc timers - 9.41 18. A T4:0/TT C5:
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plc timers - 9.43 22. GIVE SOLUTION
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plc timers - 9.45 3. Explain what w
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plc design - 10.2 Most control syst
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plc design - 10.4 Description: Step
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plc design - 10.6 step4 bottom LS s
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plc design - 10.8 Description: A ha
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plc design - 10.10 3. The first wra
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plc design - 10.12 3. (for both sol
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plc design - 10.14 (with latches fi
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plc design - 10.16 a) Start in an i
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plc flowchart - 11.1 11. FLOWCHART
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plc flowchart - 11.3 START Open out
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plc flowchart - 11.5 STEP 1: Add la
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plc flowchart - 11.7 STEP 2: Write
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plc flowchart - 11.9 F2 start MCR U
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plc flowchart - 11.11 F6 MCR L outl
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plc flowchart - 11.13 FS F1 F6 T1 T
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plc flowchart - 11.15 11.4 SUMMARY
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plc flowchart - 11.17 2. Start Get
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plc flowchart - 11.19 F3 gas can fu
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plc flowchart - 11.21 first scan L
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plc flowchart - 11.23 ST3 button MC
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plc flowchart - 11.25 ST8 button MC
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plc flowchart - 11.27 3. A welding
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plc states - 12.1 12. STATE BASED D
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plc states - 12.3 be active while c
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plc states - 12.5 Red Yellow Green
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plc states - 12.7 Step 2: Define St
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plc states - 12.9 RESET THE STATES
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plc states - 12.11 FIRST STATE WAIT
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plc states - 12.13 THIRD STATE WAIT
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plc states - 12.15 first scan L STB
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plc states - 12.17 Informally, Stat
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plc states - 12.19 Now, simplify th
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plc states - 12.21 OUTPUT LOGIC FOR
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plc states - 12.23 Each of the alte
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plc states - 12.25 A state diagram
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plc states - 12.27 CALCULATE STATE
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plc states - 12.29 STA T5 B T4 D ST
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plc states - 12.31 4. Given the fol
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plc states - 12.33 24 V AC Power Su
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plc states - 12.35 3. T1 = ST1 •
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plc states - 12.37 5. TA = ST2 ⋅
Page 309 and 310: plc states - 12.39 first scan MCR L
Page 311 and 312: plc states - 12.41 state 3 MCR rese
Page 313 and 314: plc states - 12.43 first scan state
Page 315 and 316: plc states - 12.45 state 4 remote M
Page 317 and 318: plc states - 12.47 ST1 remote T1 bu
Page 319 and 320: plc states - 12.49 12.5 ASSIGNMENT
Page 321 and 322: plc states - 12.51 6. Implement the
Page 323 and 324: plc states - 12.53 using an equatio
Page 325 and 326: plc states - 12.55 INPUTS I/1 - sta
Page 327 and 328: plc numbers - 13.2 decimal binary o
Page 329 and 330: plc numbers - 13.4 start with decim
Page 331 and 332: plc numbers - 13.6 Therearethreemot
Page 333 and 334: plc numbers - 13.8 decimal binary b
Page 335 and 336: plc numbers - 13.10 13.2.2 Other Ba
Page 337 and 338: plc numbers - 13.12 Figure 13.17 AS
Page 339 and 340: plc numbers - 13.14 An example of a
Page 341 and 342: plc numbers - 13.16 DATA CHECKSUM 1
Page 343 and 344: plc numbers - 13.18 a) from base 10
Page 345 and 346: plc numbers - 13.20 17. Do the foll
Page 347 and 348: plc numbers - 13.22 14. octal binar
Page 349 and 350: plc memory - 14.1 14. PLC MEMORY To
Page 351 and 352: plc memory - 14.3 programs are for
Page 353 and 354: plc memory - 14.5 Type A-ASCII B -
Page 355 and 356: plc memory - 14.7 literal data valu
Page 357 and 358: plc memory - 14.9 A MOV source 130
Page 359: plc memory - 14.11 CU - count up bi
Page 363 and 364: plc memory - 14.15 • In memory lo
Page 365 and 366: plc memory - 14.17 9. A B B C MOV S
Page 367 and 368: plc basic functions - 15.1 15. LADD
Page 369 and 370: plc basic functions - 15.3 NOTE: I
Page 371 and 372: plc basic functions - 15.5 A MOV so
Page 373 and 374: plc basic functions - 15.7 ADD sour
Page 375 and 376: plc basic functions - 15.9 given as
Page 377 and 378: plc basic functions - 15.11 FRD Sou
Page 379 and 380: plc basic functions - 15.13 A AVE F
Page 381 and 382: plc basic functions - 15.15 A FAL C
Page 383 and 384: plc basic functions - 15.17 EQU A N
Page 385 and 386: plc basic functions - 15.19 the hig
Page 387 and 388: plc basic functions - 15.21 15.3.2
Page 389 and 390: plc basic functions - 15.23 Solutio
Page 391 and 392: plc basic functions - 15.25 15.4.4
Page 393 and 394: plc basic functions - 15.27 6. A th
Page 395 and 396: plc basic functions - 15.29 3. coun
Page 397 and 398: plc basic functions - 15.31 first s
Page 399 and 400: plc basic functions - 15.33 9. NEG
Page 401 and 402: plc basic functions - 15.35 6. Writ
Page 403 and 404: plc advanced functions - 16.2 ter i
Page 405 and 406: plc advanced functions - 16.4 entry
Page 407 and 408: plc advanced functions - 16.6 16.2.
Page 409 and 410: plc advanced functions - 16.8 advan
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plc advanced functions - 16.10 16.1
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plc advanced functions - 16.12 A FO
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plc advanced functions - 16.16 prog
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plc advanced functions - 16.18 A X
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plc advanced functions - 16.20 e.g.
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plc advanced functions - 16.24 Prog
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plc advanced functions - 16.28 T4:0
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plc advanced functions - 16.30 8. D
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plc advanced functions - 16.32 B3:0
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plc advanced functions - 16.34 3. I
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plc advanced functions - 16.36 S3 S
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plc advanced functions - 16.38 11.
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plc iec61131 - 17.1 17. OPEN CONTRO
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plc iec61131 - 17.3 Name Type Bits
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plc il - 18.1 18. INSTRUCTION LIST
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plc il - 18.3 LD I:000/0 AND( I:000
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plc il - 18.5 Ladder A X Instructio
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plc il - 18.7 Ladder A X Y Instruct
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plc il - 18.9 Program File 2: Label
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plc st - 19.1 19. STRUCTURED TEXT P
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plc st - 19.3 GOOD BAD *) FUNCTION
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plc st - 19.5 Text Program Line VAR
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plc st - 19.7 Time Value 25ms 5.5ho
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plc st - 19.9 • Functions for Boo
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plc st - 19.11 F8:10 := 0; FOR (N7:
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plc st - 19.13 the delay time for a
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plc st - 19.15 • The list below g
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plc st - 19.17 Function MAX(A,B,...
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plc st - 19.19 .... D := TEST(1.3,
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plc sfc - 20.1 20. SEQUENTIAL FUNCT
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plc sfc - 20.3 selection branch - a
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plc sfc - 20.5 press will then retr
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plc sfc - 20.7 first scan INITIALIZ
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plc sfc - 20.9 transition 5 top lim
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plc sfc - 20.11 step 6 U step 6 L t
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plc sfc - 20.13 Program 3 (for step
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plc sfc - 20.15 ST2 TR8 ST2 TR13 FS
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plc sfc - 20.17 20.4 PRACTICE PROBL
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plc sfc - 20.19 2. Start EW crosswa
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plc sfc - 20.21 4. step 1 step 2 T1
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plc sfc - 20.23 T1 remote L step 3
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plc sfc - 20.25 step 1 step 2 step
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plc fb - 21.2 A FBD program is cons
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plc fb - 21.4 Figure 21.6 shows a d
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plc analog - 22.1 22. ANALOG INPUTS
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plc analog - 22.3 A more realistic
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plc analog - 22.5 R = 2 N = R max -
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plc analog - 22.7 Figure 22.6 Low S
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plc analog - 22.9 ASIDE: This devic
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plc analog - 22.11 (Note: each type
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plc analog - 22.13 important if the
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plc analog - 22.15 Given, Calculate
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plc analog - 22.17 tion will change
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plc analog - 22.19 A t V eff = A A
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plc analog - 22.21 flow. The resist
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plc analog - 22.23 • Analog shiel
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plc analog - 22.25 5. A card with a
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plc analog - 22.27 7. A SIN Source
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plc analog - 22.29 22.8 ASSIGNMENT
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continuous sensors - 23.2 terized w
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continuous sensors - 23.4 θ max V
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continuous sensors - 23.6 sensors r
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continuous sensors - 23.8 Normally
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continuous sensors - 23.10 A rod dr
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continuous sensors - 23.12 on off o
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continuous sensors - 23.14 Sealant
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continuous sensors - 23.16 After th
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continuous sensors - 23.18 stress d
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continuous sensors - 23.20 23.2.5 L
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continuous sensors - 23.22 These se
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continuous sensors - 23.24 result i
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continuous sensors - 23.26 very hig
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continuous sensors - 23.28 mV 80 E
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continuous sensors - 23.30 Thermist
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continuous sensors - 23.32 23.2.9 O
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continuous sensors - 23.34 device +
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continuous sensors - 23.36 The circ
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continuous sensors - 23.38 put is p
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continuous sensors - 23.40 ratio. I
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continuous sensors - 23.42 10. enco
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continuous actuators - 24.1 24. CON
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continuous actuators - 24.3 command
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continuous actuators - 24.5 wear, w
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continuous actuators - 24.7 ASIDE:
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continuous actuators - 24.9 L2 L1 L
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continuous actuators - 24.11 torque
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continuous actuators - 24.13 • Si
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continuous actuators - 24.15 runnin
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continuous actuators - 24.21 cally
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continuous actuators - 24.23 e f =
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continuous actuators - 24.25 24.5 S
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continuous actuators - 24.27 How ma
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plc pid - 25.2 valve a) Water Tank
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plc pid - 25.4 to a process, and tu
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plc pid - 25.6 θ neural desired +
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plc pid - 25.8 next two sections de
Page 615 and 616:
plc pid - 25.10 Figure 25.10 A Comb
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plc pid - 25.12 25.3.4 PID Control
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plc pid - 25.14 PID Control Block:
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plc pid - 25.16 S2:1/15 - first sca
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plc pid - 25.18 SOLUTION Analog Inp
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plc pid - 25.20 BT9:0/DN BT9:2/EN B
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plc pid - 25.22 4. Assume the value
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plc pid - 25.24 7. S2:1/15 - first
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plc pid - 25.26 25.8 ASSIGNMENT PRO
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plc fuzzy - 26.1 26. FUZZY LOGIC T
Page 635 and 636:
plc fuzzy - 26.3 1. If (bucket is f
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plc fuzzy - 26.5 1. If v error is L
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plc fuzzy - 26.7 final motor contro
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plc fuzzy - 26.9 response will be s
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plc serial - 27.2 An example of a n
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plc serial - 27.4 A typical data by
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plc serial - 27.6 Modem Computer co
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plc serial - 27.8 RI - (ring indica
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plc serial - 27.10 ABL(channel, con
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plc serial - 27.12 ACI String ST9:1
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plc serial - 27.14 on many new inst
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plc serial - 27.16 5. Write a progr
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plc serial - 27.18 5. MOV Source F8
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plc network - 28.1 28. NETWORKING
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plc network - 28.3 ... R Repeater R
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plc network - 28.5 that syntax, for
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plc network - 28.7 28.1.4 Control N
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plc network - 28.9 • Data packet
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plc network - 28.11 MG9:0/EN MSG Se
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plc network - 28.13 1bit 11 bits 1b
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plc network - 28.15 46 to 1500 byte
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plc network - 28.17 1 byte 1 byte D
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plc network - 28.19 CMD 00 01 02 05
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plc network - 28.21 Table 1: Networ
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plc network - 28.23 Figure 28.17 A
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plc network - 28.25 2. MG9:0/EN MG9
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plc network - 28.27 b) MG9:0/EN MSG
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plc network - 28.29 to advance a he
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plc internet - 29.2 Aside: Open a D
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plc internet - 29.4 SMTP (Simple Ma
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plc internet - 29.6 Aside: While lo
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plc internet - 29.8 • A client do
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plc internet - 29.10 Windows machin
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plc hmi - 30.1 30. HUMAN MACHINE IN
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plc hmi - 30.3 1. Who needs what in
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plc electrical - 31.1 31. ELECTRICA
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plc electrical - 31.3 terminals pow
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plc electrical - 31.5 L1 L2 L3 star
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plc electrical - 31.7 L1 L2 L3 M M
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plc electrical - 31.9 31.2.2 Ground
Page 715 and 716:
plc electrical - 31.11 Note: Always
Page 717 and 718:
plc electrical - 31.13 31.2.4 Suppr
Page 719 and 720:
plc electrical - 31.15 Dirt - Dust
Page 721 and 722:
plc electrical - 31.17 more sensiti
Page 723 and 724:
plc electrical - 31.19 • Use NO b
Page 725 and 726:
plc electrical - 31.21 4. Why are n
Page 727 and 728:
plc software - 32.2 Sabotage - For
Page 729 and 730:
plc software - 32.4 provides good t
Page 731 and 732:
plc software - 32.6 Table 1: ANSI/I
Page 733 and 734:
plc software - 32.8 orifice plate m
Page 735 and 736:
plc software - 32.10 Each block in
Page 737 and 738:
plc software - 32.12 2. A basic mod
Page 739 and 740:
plc software - 32.14 Project Notes
Page 741 and 742:
plc software - 32.16 Application No
Page 743 and 744:
plc software - 32.18 Internal Locat
Page 745 and 746:
plc software - 32.20 These design s
Page 747 and 748:
plc selection - 33.1 33. SELECTING
Page 749 and 750:
plc selection - 33.3 PLC MEMORY TIM
Page 751 and 752:
plc selection - 33.5 Typical values
Page 753 and 754:
plc selection - 33.7 FEATURE PLC Si
Page 755 and 756:
plc selection - 33.9 - when a speci
Page 757 and 758:
plc function ref - 34.1 34. FUNCTIO
Page 759 and 760:
plc function ref - 34.3 XIC, XIO, O
Page 761 and 762:
plc function ref - 34.5 OSR, OSF -
Page 763 and 764:
plc function ref - 34.7 CTU - CounT
Page 765 and 766:
plc function ref - 34.9 TON - Timer
Page 767 and 768:
plc function ref - 34.11 DTR - Data
Page 769 and 770:
plc function ref - 34.13 LIM - LIMi
Page 771 and 772:
plc function ref - 34.15 ADD, DIV,
Page 773 and 774:
plc function ref - 34.17 CLR - CLea
Page 775 and 776:
plc function ref - 34.19 SRT - SoRT
Page 777 and 778:
plc function ref - 34.21 34.1.7 Mov
Page 779 and 780:
plc function ref - 34.23 COP - file
Page 781 and 782:
plc function ref - 34.25 FLL - file
Page 783 and 784:
plc function ref - 34.27 34.1.9 Lis
Page 785 and 786:
plc function ref - 34.29 SQI - SeQu
Page 787 and 788:
plc function ref - 34.31 FOR, NXT,
Page 789 and 790:
plc function ref - 34.33 SFR - Sequ
Page 791 and 792:
plc function ref - 34.35 MSG - MeSs
Page 793 and 794:
plc function ref - 34.37 34.1.12 St
Page 795 and 796:
plc function ref - 34.39 AEX - Asci
Page 797 and 798:
plc function ref - 34.41 ASC - Asci
Page 799 and 800:
plc function ref - 34.43 Table 1: I
Page 801 and 802:
plc function ref - 34.45 BSR BTD BT
Page 803 and 804:
plc function ref - 34.47 Table 1: I
Page 805 and 806:
plc glossary - 35.1 35. COMBINED GL
Page 807 and 808:
plc glossary - 35.3 background supp
Page 809 and 810:
plc glossary - 35.5 bottom-up desig
Page 811 and 812:
plc glossary - 35.7 noise immunity.
Page 813 and 814:
plc glossary - 35.9 35.4 D daisy ch
Page 815 and 816:
plc glossary - 35.11 DTR (Data Term
Page 817 and 818:
plc glossary - 35.13 flow chart - a
Page 819 and 820:
plc glossary - 35.15 impedance - In
Page 821 and 822:
plc glossary - 35.17 ladder diagram
Page 823 and 824:
plc glossary - 35.19 motion detect
Page 825 and 826:
plc glossary - 35.21 OSF (Open Soft
Page 827 and 828:
plc glossary - 35.23 used to pull i
Page 829 and 830:
plc glossary - 35.25 but at the cos
Page 831 and 832:
plc glossary - 35.27 step response
Page 833 and 834:
plc glossary - 35.29 operating syst
Page 835 and 836:
plc references - 36.1 36. PLC REFER
Page 837 and 838:
plc references - 36.3 Table 1: Auth
Page 839 and 840:
plc references - 36.5 *Ridley, J.E.
Page 841 and 842:
gfdl - 37.2 ical or political posit
Page 843 and 844:
gfdl - 37.4 * A. Use in the Title P
Page 845 and 846:
gfdl - 37.6 37.8 AGGREGATION WITH I
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