Omron CJ Series Operation Manual page 66

Data Exchange with the CPU Unit
I/O Address
Word Bits
Inputs n+8 01
(Tempera-
00
ture Con-
trol Unit to
n+9 15
CPU Unit)
14
13
12
11
10
09
08
05 to 07
04
03
02
01
00
Loop Name
Loop 1 AL1 Flag The AL1/AL2 Flag is ON when the temperature is within the alarm
range set for the input value. The flag is OFF when the tempera-
AL2 Flag
ture is not within the alarm range set for the input value.
Loop 2 Save Com- The Save Completed Flag turns ON when writing data from RAM
pleted Flag to EEPROM has been completed. The write is started by turning
ON bit 14 of CIO (n+2), the Save Bit. The Save Completed Flag
turns OFF when the Save Bit turns ON. (It is OFF immediately
after power is turned ON.)
Sensor Error The Sensor Error Flag turns ON for the following:
Flag
A sensor is not connected.
The connection to sensor is broken.
A temperature exceeding the specified temperature range has
been input.
CT Overflow The CT Overflow Flag turns ON if the heater current detected by
Flag the CT (Current Transformer) exceeds 55.0 A.
Fatal Control The Fatal Control Error Flag turns ON for the following:
Error Flag
Cold-junction compensator error, CPU Unit WDT error
Standby Flag The Standby Flag turns ON when the Temperature Control Unit is
waiting for I/O refreshing after power is turned ON or the Unit is
restarted.
PID Con- The PID Constants Calculated Flag turns ON when the PID con-
stants Calcu- stants calculated for autotuning have been updated.
lated Flag
When this flag is ON, the PID constants in the Operating Parame-
ters Output Area have not been output to the Temperature Control
Unit. When this flag is OFF, the PID constants in the Operating
Parameters Output Area have been output to the Temperature
Control Unit.
Setting Error The Setting Error Flag turns ON when there is a setting error in the
Flag settings in the I/O memory of the CPU Unit.
Stop Flag When the Stop Flag is OFF, the Temperature Control Unit is con-
trolling temperature. When it is ON, the Temperature Control Unit
is not controller temperature.
--- Leave set to all zeros.
Control Out- The Control Output Flag is ON when the control output is ON.
put Flag
AT Flag The AT Flag is ON when autotuning is being performed. The AT
Flag is OFF when autotuning is not being performed.
HB Flag The HB (heater burnout) Flag turns ON if the detected heater cur-
rent reaches or exceeds the value set as the Heater Burnout Cur-
rent.
AL1 Flag The AL1/AL2 Flag is ON when the temperature is within the alarm
range set for the input value. The flag is OFF when the tempera-
AL2 Flag
ture is not within the alarm range set for the input value.
Section 2-5
Function
43