Unit; Alarms Detected By The Temperature Control Unit - Omron CJ Series Operation Manual

Error and Alarm Processing
5-1-3

Alarms Detected by the Temperature Control Unit

Bit
n+8
15 Save Completed
14 Sensor Error
13 CT Overflow
12 Fatal Control Error
11 Standby
10 PID Constants
Calculated
09 Loop 1 Setting Error
status
08 Stop
07 0
06 0
05 0
04 Control Output
03 AT
02 HB
01 AL1
00 AL2
ERC Indicator Lit and RUN Indicator Lit
Bit Alarm name
Bit 14 Sensor Error An input error has
occurred.
Bit 13 CT Overflow The heater current
is above 55.0 A.
Bit 09 Setting Error There is an error in
a setting.
Bit 02 Heater Burnout A heater circuit has
burned out.
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.
n+9
Save Completed
Sensor Error
CT Overflow
Fatal Control Error
Standby
PID Constants
Calculated
Loop 2 Setting Error
status
Stop
0
0
0
Control Output
AT
HB
AL1
AL2
RUN
ERC
ERH
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
Cause Control status
Control operation continues.
(Output OFF.)
Alarm operates as if the tem-
perature is out of range.
Control operation continues.
The incorrect setting will be
ignored and operation will
continue with the settings
retained in the Unit.
Control operation continues.
CIO word
n+18
Save Completed
Sensor Error
0
Fatal Control Error
Standby
PID Constants
Calculated
Loop 3 Setting Error
status
Stop
0
0
0
Control Output
AT
0
AL1
AL2
Lit
Not lit
Check the corresponding loop for incor-
rect input wiring, short circuit, and incor-
rect input type setting.
The corresponding loop's heater current
value will be correct when the current is
within range.
Check the corresponding loop's "Setting
Error Number" in CIO (n+7) or
CIO (n+17). Correct the indicated setting.
Check the corresponding loop's heater
and repair the heater where the burnout
occurred.
Section 5-1
n+19
Save Completed
Sensor Error
0
Fatal Control Error
Standby
PID Constants
Calculated
Loop 4 Setting Error
status
Stop
0
0
0
Control Output
AT
0
AL1
AL2
Processing
73