ALLEN BRADLEY 1747-L551 PLC Processor

More documents

Recommendations

Info

10–26 Troubleshooting SLC 5/04 (1747-L541, 1747-L542, and 1747-L543) SLC 5/05 (1747-L551, 1747-L552, and 1747-L553) Keyswitch GND VBB Mother Board GND Mother Board VBB Right Side View Troubleshooting Your Input Modules The following will assist you in troubleshooting your input modules. Input Circuit Operation An input circuit responds to an input signal in the following manner: 1. An input filter removes false signals due to contact bounce or electrical interference. 2. Opto-electrical isolation protects the input circuit and backplane circuits by isolating logic circuits from input signals. 3. Logic circuits process the signal. 4. An input LED turns on or off indicating the status of the corresponding input device. Input Input Conditioning Opto-Electrical Isolation Logic Circuits Backplane LED Publication 1747-6.2
Troubleshooting 10–27 Troubleshooting Your Input Modules If your Input Circuit LED is On Off And Your Input Device is On/Closed/Activated Off/Open/Deactivated at On/Closed/Activated Off/Open/Deactivated And Probable Cause Recommended Action Your input device will not turn off. Your program operates as though it is off. Your program operates as though it is on and/or the input circuit will not turn off. Your program operates as though it is off and/or the input circuit cuit will not turn on. Your input device will not turn on. Your program operates as though it is on. Device is shorted or damaged. Input circuit is damaged. Input is forced off in program. Input device Off-state leakage current exceeds input circuit specification. Input device is shorted or damaged. Input circuit is damaged. Input circuit is incompatible. Low voltage across the input. Incorrect wiring or an open circuit. Input signal turn on time too fast for input circuit. Input circuit is damaged. Input device is shorted or damaged. Input is forced on in program. Input circuit is damaged. Verify device operation. Replace device. Verify proper wiring. Try other input circuit. Replace module. Check the FORCED I/O or FORCE LED on processor and remove forces. Check device and input circuit specifications. Use load resistor to bleed-off current. Verify device operation. Replace device. Verify proper wiring. Try other input circuit. Replace module. Check specification and sink/source compatibility (if DC input). Check the voltage across input circuit and check source voltage. Check wiring and COMmon connections. Check timing specifications. Verify proper wiring. Try other input circuit. Replace module. Verify operation. Replace device. Check processor FORCED I/O or FORCE LED and remove forces. Verify proper wiring. Try other input circuit. Replace module. Verify proper wiring. Try other input circuit. Replace module. Publication 1747-6.2
Page 1 and 2:
Allen-Bradley SLC 500 Modular Hardw
Page 3 and 4:
The information below summarizes th
Page 5 and 6:
iv Table of Contents DH-485 Interfa
Page 7 and 8:
vi Table of Contents Recommendation
Page 9 and 10:
viii Table of Contents Connecting t
Page 11 and 12:
x Table of Contents Calculating Hea
Page 13 and 14:
P-2 Preface How to Use this Manual
Page 15 and 16:
P-4 Preface Conventions Used in thi
Page 17 and 18:
1-2 Quick Start for Experienced Use
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
2-2 Selecting Your Hardware Compone
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
2-10 Selecting Your Hardware Compon
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
3-2 System Installation Recommendat
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
3-10 System Installation Recommenda
Page 63 and 64:
3-12 System Installation Recommenda
Page 65 and 66:
4-2 Mounting Your SLC 500 Control S
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
5-2 Identifying the Components of Y
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
5-10 Identifying the Components of
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
6-2 Installing Your Hardware Compon
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
6-10 Installing Your Hardware Compo
Page 97 and 98:
7-2 Wiring Your I/O Modules Contact
Page 99 and 100:
7-4 Wiring Your I/O Modules Prepari
Page 101 and 102: 7-6 Wiring Your I/O Modules Feature
Page 103 and 104: 7-8 Wiring Your I/O Modules Octal L
Page 105 and 106: 7-10 Wiring Your I/O Modules Using
Page 107 and 108: This chapter describes how to start
Page 109 and 110: Starting Up Your Control System 8-3
Page 119 and 120: This chapter covers the following m
Page 121 and 122: Maintaining Your Control System 9-3
Page 127 and 128: In this chapter, you will learn abo
Page 129 and 130: Troubleshooting 10-3 Replacing Fuse
Page 131 and 132: Troubleshooting 10-5 If the LEDs in
Page 133 and 134: Troubleshooting 10-7 If the LEDs in
Page 135 and 136: Troubleshooting 10-9 Identifying SL
Page 137 and 138: Troubleshooting 10-11 Troubleshooti
Page 139 and 140: Troubleshooting 10-13 If the LEDs i
Page 143 and 144: Troubleshooting 10-17 Identifying S
Page 145 and 146: Troubleshooting 10-19 If the RS232
Page 147 and 148: Troubleshooting 10-21 Identifying P
Page 151: Troubleshooting 10-25 Returning the
Page 155 and 156: Troubleshooting 10-29 Troubleshooti
Page 157 and 158: 11-2 Replacement Parts Catalog Numb
Page 159 and 160: The information in this appendix wi
Page 161 and 162: Setting Up the DH-485 Network A-3 O
Page 163 and 164: Setting Up the DH-485 Network A-5 E
Page 165 and 166: Setting Up the DH-485 Network A-7 I
Page 167 and 168: Setting Up the DH-485 Network A-9 T
Page 169 and 170: Setting Up the DH-485 Network A-11
Page 175 and 176: This appendix provides an overview
Page 177 and 178: RS-232 Communication Interface B-3
Page 195 and 196: This appendix provides an overview
Page 197 and 198: Setting Up the DH+ Network C-3 Wiri
Page 199 and 200: This appendix provides a brief intr
Page 201 and 202: Control Networks D-3 DeviceNet Netw
Page 203 and 204:
- Use this Table to Calculate the
Page 205 and 206:
Power Supply Worksheet E-3 Hardware
Page 207 and 208:
This appendix will assist you in ca
Page 209 and 210:
Calculating Heat Dissipation for th
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
This appendix: • describes SLC 5/
Page 217 and 218:
Communicating with Devices on an Et
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
You can find the following terms us
Page 231 and 232:
Glossary GL-3 Initiator — A node
Page 233 and 234:
Glossary GL-5 Signal Delay — For
Page 235 and 236:
I-2 Index hardware features, 5-2, 6
Page 237 and 238:
I-4 Index DH-485 Communication Inte
Page 239 and 240:
I-6 Index keyswitch positions for t
Page 241 and 242:
I-8 Index Publication 1747-6.2 Q Qu
Page 243 and 244:
I-10 Index T testing inputs, 8-5 ou
show all

ALLEN BRADLEY 1747-L551 PLC Processor

Create successful ePaper yourself

Delete template?

Save as template?