Bfm#70][Bfm#110][Bfm#150][Bfm#190] Control Output Cycle Setting/Heating Control Output Period Setting; Bfm#71][Bfm#111][Bfm#151][Bfm#191] Cooling Control Output Period Setting - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U
8.2.34 [BFM#70][BFM#110][BFM#150][BFM#190] Control output cycle setting/
Heating control output period setting
To these buffer memories, enter the control output (MV) cycle. For heating/cooling PID control, enter the
control output (MV) cycle on the heating side.
Set the time in which the control output (MV) turns ON and OFF.
The ON duration and OFF duration of the control output (MV) are as follows.
ON duration :
Control output cycle/Control output cycle on heating side (sec) × Control output value (%)
OFF duration :
Control output cycle/Control output cycle on heating side (sec) × (100 - Control output value (%))
BFM No.
CH1 CH2 CH3 CH4
#70 #110 #150 #190 Setting range : 5 to 1000 (0.5 to 100.0 sec.)
Example of operation
(When the control output cycle is 30 sec and the control output value (MV) is 60%)
Control output (MV)
Caution
Handling numbers containing decimal places. The set value should be the actual value multiplied by 10.

8.2.35 [BFM#71][BFM#111][BFM#151][BFM#191] Cooling control output period setting

To these buffer memories, enter the control output (MV) cycle on the cooling side for heating/cooling PID
control.
The ON duration and OFF duration of the control output (MV) are as follows.
ON duration :
Control output cycle on cooling side (sec) × Control output value (%)
OFF duration :
Control output cycle on cooling side (sec) × (100 - Control output value (%))
BFM No.
CH1 CH2 CH3 CH4
#71 #111 #151 #191
*1. 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.
98
Description
18 sec. 12 sec.
ON
OFF
Control output cycle
30 sec.
→ For an operation example of the control output cycle on the cooling side,
Description
Setting range :
• PID control :
0 (Not used)
• Heating/cooling PID control :
5 to 1000 (0.5 to 100.0 sec.)
8 Buffer Memory
8.2 Buffer Memory Details
Initial
R/W Backup
value
300 R/W
refer to Subsection 8.2.34.
Initial
R/W Backup
value
*1
300
R/W