Error Displays - Omron E5CN-HT User Manual

Error Displays

When an error occurs, the error contents are shown on the No. 1 or the No. 2 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.)
The input type is not set correctly.
The sensor is disconnected or short-circuited.
The sensor is not wired correctly.
The sensor is not connected.
Note Control Range
Resistance thermometer, thermocouple input: Temperature setting lower limit
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.
Note With resistance thermometer input, a break in the A, B, or B' line is regarded as a disconnection.
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 setting level is set to ON, the output assigned
to the alarm 1 function turns ON whenever an input error occurs.
An error message is displayed when the PV, PV/SP, or PV/MV is displayed.
Note The control output turns OFF. However, when the manual MV, MV at reset, or MV at error is set, the con-
trol 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 19,999
• When more than 32,400
318
setting upper limit +20 C
(Temperature setting lower limit 40 F to temperature
setting upper limit +40 F)
5% to +105% of scaling range
[[[[
]]]]
Appendix
20 C to temperature