Emerson ROC827 Guidelines, Troubleshooting J & K Type Thermocouple Input Modules

ROC827 Instruction Manual

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:

ƒIBM-compatible personal computer.

ƒROCLINK 800 Configuration software (version 1.60 or greater)

ƒFlat-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

6.1Guidelines

When you are attempting to diagnose a problem with the ROC827:

ƒRemember to write down what steps you have taken.

ƒNote the order in which you remove components.

ƒNote the orientation of the components before you alter or remove them.

ƒSave the configuration and log data. Refer to “Preserving Configuration and Log Data” in this chapter.

ƒRead 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.

Issued Mar-06 Troubleshooting 6-1