Hitachi WJ Series

Chapter 9 Inverter Functions
9-2-15
9.2.10 Setting Frequency Command by PID Control
 How to use PID control for the fan and pump?
 How to use process control?
 When using the PID function, output frequency command is set according to PID calculation
results. To enable this function, set the "PID enable [A071]" to "Enable (01)" or "Enable (with
inverted output) (02)". Set the PID target value input source for the "Frequency input source
selection [A001]
*1
" and set the feedback input source for the "PID feedback input source
selection [A076]".
For details regarding the PID function, refer to "9.8 Driving by PID Process Control".
Code
Item
Description
Data
[A001]
*1
Frequency input
source selection
Sets the target value input source when the PID function
is enabled.
00 to 10
[A071]
PID enable
Disable: The PID function is disabled.
00
Enable: The PID function is enabled. The PID calculation
results only support forward rotation.
01
Enable: The PID function is enabled. Reverse rotation
can also be performed according to the PID
calculation results.
02
[A076]
PID feedback input
source selection
Analog current input from the [Ai2] terminal
00
Analog voltage input from the [Ai1] terminal
01
Input from Modbus communication
02
Pulse frequency from the [PLA] terminal
03
Calculation function result
10
*1. "2nd-motor control [SET]" target parameter. The second control parameter is also subject to setting.
Q
A