Fuji Electric FRENIC-HVAC User Manual page 551

J527 External PID Control 1 (Feedback error detection mode)
J529
J530
J531
Under external PID control, the inverter can detect abnormal feedback values (PV).
In the case of external PID control 1, if the error level of a PV signal (Upper limit: J529,
Lower limit: J53) is kept for the feedback error detection time (J531), the inverter regards it as
an error, then stops or continues running according to the mode specified by J527.
The table below lists the function codes available for external PID control 1, 2 and 3.
External PID
control 1
External PID
control 2
External PID
control 3
 External PID control 1 to 3 (Feedback error detection mode) (J527, J627, J677)
J527/J627/J677 specifies the error processing to be performed if a feedback error occurs.
- Data setting range: 0 to 2
Data for
J527/J627/J677
0
1
2
Feedback errors can be monitored from the external equipment by assigning the digital output
signal EPV1-OFF, EPV2-OFF or EPV3-OFF to any of the output terminals [Y1] to [Y4],
[Y5A/C], and [30A/B/C] with any of E20 through E24 and E27.
- External PID control 1: EPV1-OFF (E20 to E24 and E27, data = 215)
- External PID control 2: EPV2-OFF (E20 to E24 and E27, data = 225)
- External PID control 3: EPV3-OFF (E20 to E24 and E27, data = 235)
(Feedback error upper-limit)
(Feedback error lower-limit)
(Feedback error detection time)
J627 (External PID Control 2 (Feedback error detection mode)
J629 (External PID Control 2 (Feedback error upper-limit)
J630 (External PID Control 2 (Feedback error lower-limit)
J631 (External PID Control 2 (Feedback error detection time)
J677 (External PID Control 3 (Feedback error detection mode)
J679 (External PID Control 3 (Feedback error upper-limit)
J680 (External PID Control 3 (Feedback error lower-limit)
J681 (External PID Control 3 (Feedback error detection time)
Feedback error Feedback error
detection mode upper limit
J527 J529
J627 J629
J677 J679
Disable: Turn ON the following output signal and continue to run.
EPV1-OFF for external PID control 1
EPV2-OFF for external PID control 2
EPV3-OFF for external PID control 3
Enable: Coast to a stop (PVA trip)
Enable: Decelerate to a stop and cause a PVA trip.
6-241
6.3 Details of Function Codes
Feedback error Error detection
lower limit time
J530
J630
J680
Error processing
J531
J631
J681