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ROC827 Instruction Manual
Issued Mar-06 Troubleshooting 6-1
Chapter 6 – Troubleshooting
This chapter provides generalized guidelines for troubleshooting the
ROC827. Perform the procedures in this chapter before you remove
power from the ROC827 for any reason, after you restore power to the
ROC827, and if you disassemble the ROC827.
Use the following tools for troubleshooting:
IBM-compatible personal computer.
ROCLINK 800 Configuration software (version 1.60 or greater)
Flat-head (size 1/10 inch) and Philips (size 0) screwdrivers.
In This Chapter
6.1 Guidelines................................................................................................6-1
6.2 Checklists ................................................................................................6-2
6.2.1 Serial Communications ................................................................6-2
6.2.2 I/O Point .......................................................................................6-2
6.2.3 Software .......................................................................................6-3
6.2.4 Powering Up.................................................................................6-3
6.2.5 MVS Module.................................................................................6-3
6.3 Procedures ..............................................................................................6-4
6.3.1 Preserving Configuration and Log Data.......................................6-4
6.3.2 Restarting the ROC827................................................................6-4
6.3.3 Troubleshooting Analog Input Modules........................................6-5
6.3.4 Troubleshooting Analog Output Modules.....................................6-7
6.3.5 Troubleshooting Discrete Input Modules......................................6-7
6.3.6 Troubleshooting Discrete Output Modules...................................6-8
6.3.7 Troubleshooting Discrete Output Relay Modules ........................6-8
6.3.8 Troubleshooting Pulse Input Modules..........................................6-9
6.3.9 Troubleshooting RTD Input Modules ...........................................6-9
6.3.10 Troubleshooting J & K Type Thermocouple Input Modules.......6-10
6.1 Guidelines
When you are attempting to diagnose a problem with the ROC827:
Remember to write down what steps you have taken.
Note the order in which you remove components.
Note the orientation of the components before you alter or remove
them.
Save the configuration and log data. Refer to “Preserving
Configuration and Log Data” in this chapter.
Read and follow all Cautions in this manual.
When you are done troubleshooting, perform the restart procedure as
described in “Restarting the ROC827” in this chapter.