Starting And Stopping Temperature Control; Precautions For Operation; Unit; Run/Stop Control - Omron CJ Series Operation Manual

Starting and Stopping Temperature Control

3-12 Starting and Stopping Temperature Control

3-12-1 Run/Stop Control

Starting Loop 1 and
Stopping Loop 2

3-13 Precautions for Operation

!Caution It takes approximately 4 seconds for outputs from the Temperature Control
66
To start temperature control for a loop that has been stopped, turn OFF the
corresponding Stop Bit in the output area of the CIO Area words allocated to
the Temperature Control Unit. To stop temperature control for the loop, turn
ON the Stop Bit.
• The initial setting of the bits is OFF (running).
• There is a separate Stop Bit for each loop.
To start control in loop 1 and stop control in loop 2, turn OFF the Loop 1 Stop
Bit (bit 06 of CIO word n+2) and turn ON the Loop 2 Stop Bit (bit 04 of CIO
word n+2).
Bit
CIO n+2
15 Loop 1 Save Bit
14 Loop 2 Save Bit
13 Loop 1 Change PID Constants
Bit
12 Loop 2 Change PID Constants
Bit
11 0
10 0
09 0
08 0
07 Loop 1 0
06 Stop Bit
05 Loop 2 0
04 Stop Bit
03 Loop 1 Stop AT Bit
02 Start AT Bit
01 Loop 2 Stop AT Bit
00 Start AT Bit
When the IOM Hold Bit is ON, consider the status of external loads because
the output bits will not be cleared when the PLC is switched to PROGRAM
mode from RUN or MONITOR mode.
Unit (control outputs and heater burnout alarm output) to go ON after the PLC
is turned ON. This delay must be taken into account if the Temperature Con-
trol Unit is being incorporated in an external sequence circuit.
Section 3-12
CIO word
CIO n+12
Loop 3 Save Bit
Loop 4 Save Bit
Loop 3 Change PID Constants
Bit
Loop 4 Change PID Constants
Bit
0
0
0
0
Loop 3 0
Stop Bit
Loop 4 0
Stop Bit
Loop 3 Stop AT Bit
Start AT Bit
Loop 4 Stop AT Bit
Start AT Bit