Error Displays - Omron E5CN User Manual

Error Displays

When an error occurs, the error contents are shown on the No. 1 display.
This section describes how to check error codes on the display, and the actions to be taken to remedy the
problems.
s.err
Input Error
Meaning
The input value has exceeded the control range. (See note.)
Note Control Range
Resistance thermometer, thermocouple input: Temperature setting lower limit
ES1B input:
Analog input
Action
Check the wiring of inputs for miswiring, disconnections, and short-circuits and check 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 Controller must be replaced. If the display is restored, then the probable
cause is electrical noise affecting the control system. Check for electrical noise.
Operation at Error
After an error occurs, the error is displayed and the alarm outputs function as if the upper limit has been
exceeded.
When the "input error output" parameter in the advanced function level is set to ON, the alarm 1 output turns
ON whenever an input error occurs.
An error message is displayed when the PV, PV/SP, or PV/MV is displayed.
Note When the manual MV, MV at stop, or MV at PV error is set, the control output corresponds to the set
value.
[[[[
Display Range Exceeded
]]]]
Meaning
Though this is not an error, it is displayed if the process value exceeds the display range when the control
range is larger than the display range.
The display ranges are shown below (with decimal points omitted).
• When less than 1,999
• When more than 9,999
204
setting upper limit + 20 C
(Temperature setting lower limit
setting upper limit + 40 F)
Same as input indication range
5% to +105% of scaling range
[[[[
]]]]
Appendix A
20 C to temperature
40 F to temperature