Bfm#65][Bfm#105][Bfm#145][Bfm#185] Output Limiter Lower Limit; Bfm#66][Bfm#106][Bfm#146][Bfm#186] Cooling Upper Output Limiter Setting - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U

8.2.29 [BFM#65][BFM#105][BFM#145][BFM#185] Output limiter lower limit

To these buffer memories, set the output limiter lower limit for setting the lower limit of the control output value
(MV).
→ For details on the output limiter upper limit/heating upper output limiter, refer to Subsection 8.2.28.
BFM No.
CH1 CH2 CH3 CH4
#65 #105 #145 #185
*1. These buffer memories can be written only while standard PID control is being performed.
Caution
• Handling numbers containing decimal places. The set value should be the actual value multiplied by 10.
• The setting of the output limiter lower limit is invalid while two-position control is being performed.
• The setting of the output limiter lower limit is invalid while heating/cooling PID control is being performed.
• Proper PID constants may not be obtained if the output limiter lower limit is set and auto tuning is
performed.
Do not set the output limiter lower limit when performing auto tuning.

8.2.30 [BFM#66][BFM#106][BFM#146][BFM#186] Cooling upper output limiter setting

To these buffer memories, set the output limiter upper limit on the cooling side for setting the upper limit of the
control output value (MV) on the cooling side.
→ For details on the output limiter upper limit/heating upper output limiter, refer to Subsection 8.2.28.
BFM No.
CH1 CH2 CH3 CH4
#66 #106 #146 #186
*1. 1000 in the case of heating/cooling PID control.
*2. These buffer memories can be written only while heating/cooling PID control is being performed.
Caution
• Handling numbers containing decimal places. The set value should be the actual value multiplied by 10.
• The setting of the cooling output limiter upper limit is invalid while two-position control is being performed.
• The setting of the cooling output limiter upper limit is invalid while standard PID control is being performed.
• Proper PID constants may not be obtained if the cooling output limiter upper limit is set and auto tuning is
performed.
Do not set the cooling output limiter upper limit when performing auto tuning.
94
→ For an operation example of the output limiter lower limit, refer to Subsection 8.2.28.
Setting range :
• PID control :
-50 to Output limiter upper limit-1 (-5.0% to )
• Heating/cooling PID control :
0 (Not used)
Setting range :
• PID control :
0 (Not used)
• Heating/cooling PID control :
0 to 1050 (0.0 to 105.0%)
Description
Description
8 Buffer Memory
8.2 Buffer Memory Details
Initial
R/W Backup
value
*1
0
R/W
Initial
R/W Backup
value
*1 *2
0 R/W