Error Display - Omron E5CN User Manual

Error Display

When an error has occurred, the No.1 display alternately indicates error codes together with the current display
item.
This section describes how to check error codes on the display, and the actions you must take to remedy the
problem.
Input error
Meaning
The input value has exceeded the control range.
* Control range
Platinum resistance : Temperature setting lower limit –20°C to temperature setting upper limit +20°C
thermometer,
thermocouple input
ES1A input : Same as input indication range
Analog input : –5% to 105% of scaling range
Action
Check the wiring of inputs for miswiring, disconnections, short-circuits and the input type.
If no abnormality is found in the wiring and input type, turn the power OFF then back ON again. If the display
remains the same, the E5CN must be repaired. If the display is restored, then a probable cause could be elec-
trical noise affecting the control system. Check for electrical noise.
Operation at error
After the error occurs, the error is displayed, and control output functions turn OFF. (Current output is approx.
0 mA).
Alarm outputs function as if the upper limit value has been exceeded.
When "output input error" (advanced function level) is set to ON, the alarm 1 output turns ON when an input
error occurs.
An error message is displayed when "process value" or "PV/SP" are displayed.
Memory error
Meaning
Internal memory operation is in error.
Action
First, turn the power OFF then back ON again. If the display remains the same, the E5CN must be repaired. If
the display is restored, then a probable cause could be electrical noise affecting the control system. Check for
electrical noise.
Operation at error
Control output and alarm output turn OFF. (Current output is approx. 0 mA).
120
(temperature setting lower limit –40°F to temperature setting upper limit +40°F)
Appendix A