Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 755 / 1218

Parameters (A) Application parameters
FR-A800 5 - 553
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.
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.
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.
I001234E
Fig. 5-268: Automatic switchover to PID control
Pr. 554 setting
Inverter operation
At FUP signal, FDN signal
output
At Y48 signal output At SLEEP operation start
0 (Initial value) Signal output only
Signal output only
Coasts to stop
1
Signal output shutoff
(E.PID)
2 Signal output only
Signal output shutoff
(E.PID)
3
Signal output shutoff
(E.PID)
10 Signal output only
Signal output only
Deceleration stop
11
Signal output shutoff
(E.PID)
12 Signal output only
Signal output shutoff
(E.PID)
13
Signal output shutoff
(E.PID)
Tab. 5-229: Stop action at SLEEP function
Output frequency
Without
PID control
Time
PID control
Pr. 127