Sanken S06-4A005-B Instruction Manual page 140

【Control Switching by External Terminals】
The function to switch various control actions in PID control with the signal input by external multi-function terminal (DI1~DI8).
● The following is the table of multi-function terminal input signal in PID control.
Code No. Function Name
1414
Selection of input terminal DI1
1415
Selection of input terminal DI2
1416
1417
Selection of input terminal DI3
1418
Selection of input terminal DI4
1419
Selection of input terminal DI5
1420
1421
Selection of input terminal DI6
Selection of input terminal DI7
Selection of input terminal DI8
● VFPID Signal
Used to switch from open loop control to PID control.
ON: Open loop control. (No PID feedback control)
Use PID command value directly as the PID output.
OFF: Switch from Open loop control to PID control.
Note: When start PID control with ON→OFF and return the VFPID signal to open loop control by another OFF→ON,
since the PID command value is directly used as the PID output, the output frequency will change greatly in case
that the integral output is large before ON, it may also cause an over-current alarm.
When return from OFF to ON, please send a stop command during inverter stoppage or after PID control is
locked by PIDLCK signal, it must be used with a stop action.
● PIDLCK Signal
Hold control output in PID control, use it when stop action is carried under that status.
ON： Lock the PID control output (hold). (no PID feedback control)
The PID control output changes with a proportion to PID command value.
OFF： Carry out PID control.
The followings are application examples of VFPID signal and PIDLCK signal.
Example) Start = open loop control
Constant-speed = switch to PID control, and start operation.
End = Lock PID control, open loop control deceleration stops.
Frequency
Control switching
PID locking
Control Open loop
Data Content
76：V/f-PID control switching terminal/VFPID
77：PID control locking terminal/PIDLCK
85：PID switching terminal/PIDL
86：PID switching terminal /PIDH
87：PID1 resetting terminal/RPID1
88：PID1 external terminal selection/PID1EX
89：PID2 external terminal selection/PID2EX
91：PID integral value holding terminal/IHOLD
92：PID integral value eliminating terminal/ICLEAR
PID control
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Factory
Setting Resolution
Presets
1 1
2
3
4
5
6
7
8
Time
Open loop