Bfm#232] Cooling Method Setting - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U
Alarm
mode
Upper/lower limit deviation value
14
alarm with re-wait
Caution
It is not possible to change the setting while control is being performed.
If the setting is changed while control is being performed, the contents of setting are reflected when control is
stopped.

8.2.54 [BFM#232] Cooling method setting

To these buffer memories, set the cooling method for performing heating/cooling PID control.
Select the cooling method among "air cooling type", "water cooling type" and "cooling gain linear type" in
accordance with the cooling unit.
Because the cooling characteristics are considerably different between the air cooling method and the water
cooling method, PID constants suitable to the cooling unit can be obtained by setting the cooling method
before starting auto tuning.
The selected cooling method is applied to all channels.
BFM No.
CH1 CH2 CH3 CH4
#232
*1. GR1 and GR2 can be written only while heating/cooling PID control is being performed.
Caution
Set the cooling method before performing auto tuning because the setting affects arithmetic operation results
of PID constants acquired by auto tuning.
112
Alarm type
When absolute deviation (= Measured value (PV) - Set value (SV)) is more than
alarm set value, an alarm is issued.
However, when control is started and when set value is changed the measured
value is ignored.
Setting range :
• PID control :
0 (Not used)
• Heating/cooling PID control :
0 : Air cooling type
1 : Water cooling type
2 : Cooling gain linear type
Description
→ For details on the cooling method, refer to Subsection 6.6.4.
Description
8 Buffer Memory
8.2 Buffer Memory Details
Initial
R/W Backup
value
*1
0
R/W