Pid Automatic Switchover Control - Mitsubishi FR-A800 Instruction Manual

(A) Application parameters
PID automatic switchover control (Pr.127)
• The system can be started up more quickly by starting up without PID control activated.
• When Pr.127 PID control automatic switchover frequency is set, the startup is made without PID control until the output
frequency reaches the Pr.127 setting. Once the PID control starts, the PID control is continued even if the output frequency
drops to Pr.127 setting or lower.
Output frequency
Pr.127
STF
PID
Selection of action at a communication error and SLEEP function stop
selection (FUP signal, FDN signal,Y48 signal, Pr.554)
• Using Pr.554 PID signal operation selection, set the action when the measured value input exceeds the upper limit
(Pr.131 PID upper limit) or lower limit (Pr.132 PID lower limit), or when the deviation input exceeds the permissible value
(Pr.553 PID deviation limit).
• Choose whether to output the signals (FUP, FDN, Y48) only or to activate the protective function to output the inverter
shutoff.
• The stop action when the inverter output is shut off by the SLEEP function can be selected.
Pr.554 setting
At FUP signal, FDN signal output
0 (Initial value) Signal output only
1 Signal output + output shutoff (E.PID)
2 Signal output only
3 Signal output + output shutoff (E.PID)
10 Signal output only
11 Signal output + output shutoff (E.PID)
12 Signal output only
13 Signal output + output shutoff (E.PID)

When each of Pr.131, Pr.132 and Pr.553 corresponding to each of the FUP, FDN and Y48 signals is set to "9999" (function not
activated), signal output and protective function are disabled.
508
PARAMETERS
Without PID
control PID control
Inverter operation
At Y48 signal output

Signal output only
Signal output + output shutoff
(E.PID)
Signal output only
Signal output + output shutoff
(E.PID)
Time
At SLEEP operation start

Coasts to stop
Deceleration stop