Program control starts
1:00 2:00
200
0
0:30 1:00
2:00
300
Select ‘Program control’ in [OUT/OFF key function] in Engineering mode 1.
Factory default value is Control output OFF function.
Set the following items in Engineering mode 1 if necessary:
Step time unit, Power restore action, Program start temperature,
Program control start type, Number of repetitions
Program pattern can be set in Main setting mode.
Example of program pattern setting
Step 1 2 3 4 5
SV ( ) 200 200 300 300 0
Time 1:00 2:00 0:30 1:00 2:00
Wait value ( ) 10 0 10 0 0
(Fig. 8.7-6)
In the above program pattern, control is performed at each step as follows.
Step 1: The SV gradually rises to 200 for 1 hour.
When step ends, Wait function works so that control cannot proceed to the next step until
PV reaches 190 when step ends.
Step 2: Fixed value control is performed to keep SV at 200 for 2 hours.
Step 3: Control is performed so that the SV gradually rises to 300 for 30 minutes.
When step is finished, Wait function works so that control cannot proceed to the next step
until PV reaches 290 .
Step 4: Fixed value control is performed to keep SV at 300 for 1 hour.
Step 5: Control is performed so that the SV gradually falls to 0 for 2 hours.
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