Error Detection - Omron SYSMAC C200H-TC Operation Manual

Error Detection

Error Detection
Sensor Input Errors
Display
ser1
ser2
serr
Data Setting Console
CT Input Overflow
Heater Burnout Alarm
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When an error occurs in an input or in the Unit, details of the error are reported to
the Data Setting Console and input relays.
Error name
Control output:
Loop 1 sensor error
The transistor output or
voltage output turns OFF
or the current output falls
below 2 mA.
Alarm output:
The alarm is output The alarm is out ut
assuming the input is
Loop 2 sensor error
10%FS.
Cold junction Control output:
compensating circuit The transistor output or
error voltage output turns OFF
or the current output falls
below 2 mA.
Alarm output turns OFF.
When a sensor error occurs, one of the codes above and the detected tempera-
ture are displayed alternately.
If a Loop 1 sensor error ser1 and a Loop 2 sensor error ser2 occur simulta-
neously, ser1 is displayed preferentially. Even if a sensor error is detected in one
Loop, the other Loop continues to operate normally. Control operation restarts
automatically five seconds after the cause of the error is corrected.
The bits shown in the table below are set to 1 when a relay input error occurs.
Wd (n+8), bit 14
Wd (n+9), bit 14
Display
ffff
The display shown in the table above will appear if the CT overflow error occurs
when the heater current monitor is selected. The display returns to normal after
the cause of the error is removed.
The bits shown in the table below are set to 1 when the CT overflow error occurs.
Wd (n+8), bit 13
Wd (n+9), bit 13
Display
HB
indicator lit
Error displayed when an abnormality occurs in the loop currently being dis-
played.
Output status after
error
Reading is
of sensor measurement
range (i.e., 10%FS
below the lower limit or
10%FS above the upper
limit).
Broken or incorrect Broken or incorrect
sensor wiring
Defective sensor
Defective Unit
SW203-4 is OFF (Loop
2 enabled) but no sensor
connected to Loop 2
Abnormality in cold
junction compensating
circuit. Applies to
thermocouple type only.
Loop 1 sensor error
Loop 2 sensor error
Error name
CT input overflow
Error name
Heater burnout
Cause
10%FS out Check the sensor wiring.
Replace the sensor.
Replace the Unit.
Correctly set switch
SW203-4.
Replace the Unit.
Both bits = 1 after a cold junction
compensating circuit error. i
Cause
The detected heater Check the CT and
current exceeds 5.5 A. heater wiring.
Loop 1 CT overflow
Loop 2 CT overflow
Cause
The detected heater Check the heater
current is below the and heater wiring.
heater burnout current Replace heater if
value. necessary.
Section 5
Remedy
j
i i
Remedy
Remedy