Bfm#75][Bfm#115][Bfm#155][Bfm#195] Normal/Reverse Operation Selection - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U

8.2.39 [BFM#75][BFM#115][BFM#155][BFM#195] Normal/reverse operation selection

To these buffer memories, set whether normal operation or reverse operation is performed in standard PID
control.
Enter "K0" to specify normal operation.
Enter "K1" to specify reverse operation.
BFM No.
CH1 CH2 CH3 CH4
#75 #115 #155 #195
*1. These buffer memories can be written only while standard PID control is being performed.
Operation
• Normal operation
The control output (MV) increases as the measured value (PV) increases.
Normal operation is generally used for cooling control.
Control output (MV)
• Reverse operation
The control output (MV) decreases as the measured value (PV) increases.
Reverse operation is generally used for heating control.
Control output (MV)
Caution
The setting of normal operation/reverse operation is invalid while heating/cooling PID control is being
performed.
102
Setting range :
• PID control :
0 : Normal operation
1 : Reverse operation
• Heating/cooling PID control :
0 (Not used)
Normal operation
Reverse operation
Description
Measured value (PV)
Measured value (PV)
8 Buffer Memory
8.2 Buffer Memory Details
Initial
R/W Backup
value
*1
1
R/W