Setting Frequency Command By Pid Control - Hitachi WJ Series User Manual

Chapter 9
9.2.10

Setting Frequency Command by PID Control

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