Contents
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xi
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4. INSTALLATION AND WIRING
4.1 Operating Environment................................................................................................................................................................ 59
4.2 Installing the Rack........................................................................................................................................................................... 60
4.3 Mounting the Modules.................................................................................................................................................................. 61
4.4 Connecting the Expansion Unit............................................................................................................................................. 61
4.5 Grounding.............................................................................................................................................................................................. 62
4.6 Grounding Methods........................................................................................................................................................................ 63
4.7 Wiring the Power Supply............................................................................................................................................................ 65
4.8 I/O Wiring ............................................................................................................................................................................................... 66
4.9 Power up/down Sequence........................................................................................................................................................ 68
4.10 Safty Circuit ....................................................................................................................................................................................... 69
5. MAINTENANCE AND CHECKS
5.1 Daily Checks........................................................................................................................................................................................ 70
5.2 Periodic Checks ................................................................................................................................................................................ 72
5.3 Spare Parts to Keep in Stock ................................................................................................................................................. 73
5.4 Battery Replacement..................................................................................................................................................................... 74
5.5 Fuse Replacement.......................................................................................................................................................................... 76
6. TROUBLESHOOTING
6.1 Troubleshooting Procedure...................................................................................................................................................... 77
6.2 Power Supply Check..................................................................................................................................................................... 78
6.3 CPU Check ........................................................................................................................................................................................... 79
6.4 Program Check.................................................................................................................................................................................. 79
6.5 Input Check........................................................................................................................................................................................... 80
6.6 Output Check ...................................................................................................................................................................................... 81
6.7 Faults Due to External Problems......................................................................................................................................... 82
6.8 List of Items for Self-Diagnostic check............................................................................................................................ 83
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