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Industrial Automation Assessment Which are programming languages defined in IEC 61131 and for what are they used ? In a function block language, which are the two elements of programming ? How is a PLC program executed and why is it that way ? Draw a ladder diagram and the corresponding function chart. Draw a sequential chart implementing a 2-bit counter Program a saw tooth waveform generator with function blocks How are inputs and outputs to the process treated in a function chart language ? Program a sequencer for a simple chewing-gum coin machine Program a ramp generator for a ventilator speed control (soft start and stop in 5s) 98/100 2.3 Programmable Logic Controllers
Industrial Automation Limitations of IEC 61131 - it is not foreseen to distribute execution of programs over several devices - event-driven execution is not foreseen. Blocks may be triggered by a Boolean variable, (but this is good so). 99/100 2.3 Programmable Logic Controllers
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2005 March, HK courtesy ABB 2. Inst
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Industrial Automation The instrumen
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2.1 Instrumentation 2.1.1 Market 2.
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Industrial Automation Binary Signal
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Industrial Automation Precision: re
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Industrial Automation Variable diff
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Industrial Automation Small positio
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Industrial Automation Force measure
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courtesy Parker Motion & Control In
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Industrial Automation 2.1.3.2 Tempe
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Thermo-element (Thermocouple) two d
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•pulsed laser •load cell •pul
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Other means: Magnetic-dynamic Corio
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Industrial Automation Drives (varia
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Pumps, valves, rods,… Industrial
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Industrial Automation Transducer A
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Object measurand Transducer Industr
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Piping and Instrumentation Diagram
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Industrial Automation Instrumentati
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Square root extraction of the input
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Connection to process, or instrumen
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Industrial Automation German IP-Pro
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Industrial Automation European Expl
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Industrial Automation Assessment Ho
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2005 March, HK set point Control of
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140 120 2 1 180 3 5 200 4 Why do we
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Industrial Automation Controllers T
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Industrial Automation Modeling: Con
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set-point (solicited) Sollwert vale
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Steam ∆P ∆f Main steam valve Ac
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Industrial Automation Two-point con
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value % 1.20 1.00 0.80 0.60 0.40 0.
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Industrial Automation A glance back
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The Watts "governor" (1791) - the f
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Industrial Automation Plant model f
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m(t), y 0 (t) 2 1.5 1 0.5 0 -0.5 co
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u 0 (t), y 0 (t) 2 1.8 1.6 1.4 1.2
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controller gain set-point u 0 error
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PID-Controller (Proportional-Integr
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time domain Laplace domain Industri
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1 0 P (K p = 15) less error, but un
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2.1 Instrumentation 2.2 Control 2.2
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Industrial Automation Nested loops
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Industrial Automation To probe furt
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POST_START_TIMER_MOD N_GT FAULT_STA
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Industrial Automation Programmable
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Industrial Automation PLC: Characte
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Switzerland SAIA, Weidmüller Indus
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(1) (2) (3) Compact Monolithic cons
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courtesy ABB Industrial Automation
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€ compact PLC (fixed number of I/
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23 4 3 3 2 12 2 I/O modules Industr
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Industrial Automation Specific Cont
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Micro: 15 to 128 I/O points Medium:
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Industrial Automation 2.3.3 PLCs: F
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CPU fieldbus controller field bus R
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Industrial Automation Matching the
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Industrial Automation Continuous Pl
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"combinatorial" 1) e.g. ladder logi
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Extend procedural languages to expr
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Function Block Diagram (FBD) AUTO A
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Industrial Automation 2.4.2.1 Funct
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Example 1: Example 2: A B external
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Industrial Automation Function Bloc
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Types of Programming Organisation U
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inary elements AND OR XOR S1 SR R Q
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Basic blocks Industrial Automation
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Page 167 and 168: Variables: Input: In0, In1, In2, In
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Page 171 and 172: Function Blocks: Continuous (time)
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Page 175 and 176: Industrial Automation 2.3.5.7 Ladde
Page 177 and 178: origin: electrical circuit correspo
Page 179 and 180: Series Parallel Industrial Automati
Page 181 and 182: Industrial Automation Ladder logic
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Page 187 and 188: Industrial Automation Programming e
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