Emerson Rosemount TCL, Manual

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Chapter 11 Troubleshooting .......................................................................................................... 85
11.1 Overview ................................................................................................................................... 85
11.2 Using the diagnostic feature ...................................................................................................... 85
11.3 Troubleshooting when a Fault message is showing .................................................................... 86
11.3.1
Main Board CPU, Main Board Factory Data, and Main Board User Data errors ...............86
11.3.2 Hardware Error ............................................................................................................87
11.3.3 Sensor Board Unknown, Sensor Board HW (Hardware) or SW (Software) Mismatch, or
Sensor Board Not Communicating .............................................................................. 87
11.3.4 Sensor Incompatible ................................................................................................... 87
11.3.5 Sensor CPU Error ......................................................................................................... 87
11.3.6 Sensor RTD open ......................................................................................................... 88
11.3.7 Sensor 1 Not Detected ................................................................................................ 88
11.3.8 Sensor Factory Data, Sensor Board User Data, and Sensor EEPROM Write errors ..........88
11.3.9 Sensor ADC error .........................................................................................................88
11.3.10 Sensor RTD Out of Range ............................................................................................ 88
11.4 Troubleshooting when a Warning message is showing .............................................................. 89
11.4.1
Sensor Need Factory Cal .............................................................................................. 89
11.4.2 Sensor Negative Reading .............................................................................................89
11.4.3 Sensor RTD Sense Open .............................................................................................. 89
11.4.4 Sensor Temperature High or Low ................................................................................ 90
11.5 Troubleshooting when no error message is showing ..................................................................90
11.5.1
Zero current is too high. .............................................................................................. 91
11.5.2 Zero current is unstable. ..............................................................................................91
11.5.3 Sensitivity is low or readings are low. ...........................................................................91
11.5.4 Process readings are erratic or wander. ....................................................................... 93
11.5.5 Readings drift. .............................................................................................................94
11.5.6 Readings are too high ..................................................................................................94
11.5.7 Temperature was more than 3 °C different from transmitter ....................................... 94
11.5.8 Current output is too low. ........................................................................................... 94
11.5.9 Alarm relays don't work. .............................................................................................. 94
11.6 Simulating inputs .......................................................................................................................95
11.7 Simulating temperature .............................................................................................................95
11.7.1
General ....................................................................................................................... 95
11.7.2 Simulating temperature .............................................................................................. 96
Chapter 12 Return of material ........................................................................................................ 99
Contents
Instruction Manual iii