A - 15
A Appendices
E5@C Digital Temperature Controllers User’s Manual (H174)
A-4 Error Displays
A
A-4 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.
Meaning
The input value has exceeded the control range. *
The input type setting is not correct.
The sensor is disconnected or shorted.
The sensor wiring is not correct.
The sensor is not wired.
* Control Range
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 Digital 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
After an error occurs, the error is displayed and the alarm outputs function as if the upper limit has
been exceeded.
It will also operate as if transfer output exceeded the upper limit. If an input error is assigned to a
control output or auxiliary output, the output will turn ON when the input error occurs. The error
message will appear in the display for the PV.
Note: The heating and cooling control outputs will turn OFF. When the manual MV, MV at stop, or MV at error
is set, the control output is determined by the set value.
s.err
Input Error
Resistance thermometer,
thermocouple input:
Temperature setting lower limit −20°C to temperature setting upper limit +20°C
(Temperature setting lower limit −40°F to temperature setting upper limit +40°F)
ES1B input: Same as input indication range
Analog input: −5% to +105% of scaling range
To Next Page
Loading...
Need help?
General
