Fuji Electric FRENIC-HVAC User Manual page 544

J515 External PID Control 1 (ON/OFF control hysteresis width)
J515, J615 or J665 specifies the hysteresis width for ON/OFF control under external PID
control 1, 2 or 3 in a physical quantity, respectively.
Setting the P gain (J510/J610/J660) to "OFF" enables ON/OFF control. If the feedback value
(PV) exceeds the threshold value "Command setting value SV + Hysteresis width (J515)," the
manipulated value (MV) switches between two positions 0% and 100%.
- Data setting range: 0.00 to 9990.00 (The setting range is restricted by the maximum scale
and minimum scale.)
● Normal operation
Manipulated value J515
(MV)
ON
100%
0%
Command value (SV)
J615 (External PID Control 2 (ON/OFF hysteresis width))
J665 (External PID Control 3 (ON/OFF hysteresis width))
● Reverse operation
J515
100%
OFF
Feedback value (PV)
6-234
J515 J515
Manipulated value
(MV)
OFF
0%
Command value (SV)
ON
Feedback value (PV)