Error Detection - Omron C200H-TV Series Operation Manual

Error Detection

Error Detection
Sensor Input Errors
Display Error name
ser1
Loop 1 sensor error
ser2
Loop 2 sensor error
serr
Cold junction
compensating circuit
error
(C200H-TC00 )
Data Setting Console
CT Input Overflow
54
When an error occurs in an input or in the Unit, details of the error are output to
the Data Setting Console and input relays (words n+8 and n+9).
The following table shows the Data Setting Console display and error contents.
Output status after
error
Control output:
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
+10%FS.
Control output:
The transistor output or
voltage output turns OFF
or the current output falls
below 2 mA.
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 simultaneously,
ser1 is displayed preferentially. Even if a sensor error is detected in one Loop, the
other Loop continues to operate normally. Control operation restarts automati-
cally five seconds after the cause of the error is corrected. If a cold junction com-
pensating circuit error occurs, reset the power supply.
The following bits are set when a sensor input error occurs.
Loop 1 sensor error
Loop 2 sensor error
Cold junction
compensating circuit error
Display Error name
ct
CT input overflow
ffff
The information is displayed as heater current monitor data. It cannot be
checked while other parameter data is being displayed. The display returns to
normal after the cause of the error is removed.
The following bits are set when a CT overflow error occurs.
Wd (n+8), bit 13 = 1
Wd (n+9), bit 13 = 1
Cause
Reading is + 10%FS out
of sensor measurement
range (i.e., 10%FS
below the lower limit or
10%FS above the upper
limit).
Broken or incorrect input
Broken or incorrect in ut
wiring
Defective input sensor
Defective Unit
SW203-4 is OFF (Loop
2 enabled) but no sensor
connected to Loop 2
Abnormality in cold
junction compensating
circuit.
Wd. n+8, bit 14 = 1; Wd. n+9, bit 14 = 0
Wd. n+8, bit 14 = 0; Wd. n+9, bit 14 = 1
Wd. n+8, bit 14 = 1; Wd. n+9, bit 14 = 1
Cause
The detected heater
current exceeds 55.0 A.
Loop 1 CT overflow
Loop 2 CT overflow
Section 5
Remedy
Check the sensor wiring.
Replace the sensor.
Replace the Unit.
Correctly set switch
SW203-4.
Replace the Unit.
Remedy
Check the CT and
heater wiring.