Omron Sysmac CJ Series, Operation Manual

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Error and Alarm Processing Section 5-1
5-1-3 Alarms Detected by the Temperature Control Unit
The ERC Indicator will light when an alarm occurs that is detected by the
Temperature Control Unit itself. The corresponding error flag will be turned
ON in the Unit’s Special I/O Unit Area. A separate CIO word is allocated to
each loop, as shown in the following table.
ERC Indicator Lit and RUN Indicator Lit
These alarms indicate that an incorrect operation was performed while the Unit
was operating normally. These alarms are cleared automatically when the
cause of the alarm is corrected.
If pin 1 of the Temperature Control Unit’s DIP Switch is OFF (stop operation
when CPU Unit is in PROGRAM mode), the RUN Indicator will be OFF when
the CPU Unit is in PROGRAM mode.I
Bit CIO word
n+8 n+9 n+18 n+19
15
Loop 1
status
Save Completed
Loop 2
status
Save Completed
Loop 3
status
Save Completed
Loop 4
status
Save Completed
14 Sensor Error Sensor Error Sensor Error Sensor Error
13 CT Overflow CT Overflow 0 0
12 Fatal Control Error Fatal Control Error Fatal Control Error Fatal Control Error
11 Standby Standby Standby Standby
10 PID Constants
Calculated PID Constants
Calculated PID Constants
Calculated PID Constants
Calculated
09 Setting Error Setting Error Setting Error Setting Error
08 Stop Stop Stop Stop
07 0 0 0 0
06 0 0 0 0
05 0 0 0 0
04 Control Output Control Output Control Output Control Output
03 AT AT AT AT
02 HB HB 0 0
01 AL1 AL1 AL1 AL1
00 AL2 AL2 AL2 AL2
Lit
RUN
ERC
ERH
Not lit
Bit Alarm name Cause Control status Processing
Bit 14 Sensor Error An input error has
occurred. Control operation continues.
(Output OFF.)
Alarm operates as if the tem-
perature is out of range.
Check the corresponding loop for incor-
rect input wiring, short circuit, and incor-
rect input type setting.
Bit 13 CT Overflow The heater current
is above 55.0 A. Control operation continues. The corresponding loop’s heater current
value will be correct when the current is
within range.
Bit 09 Setting Error There is an error in
a setting. The incorrect setting will be
ignored and operation will
continue with the settings
retained in the Unit. Check the corresponding loop’s “Setting
Error Number” in CIO (n+7) or
CIO (n+17). Correct the indicated setting.
Bit 02 Heater Burnout A heater circuit has
burned out.
Control operation continues. Check the corresponding loop’s heater
and repair the heater where the burnout
occurred.