LS Industrial Systems SV-iV5 Series - Web_47(Process PID Feedback Source Setting)

7. WEB Control Application
7-36
PID Type Block Diagram
19) WEB_46 PIDHoldTime : PID controller Maintenance Time after Hold
In case of Inverter Hold Command, the motor speed is reduced to 0. In case the output deviation of Process PID
controller exists, the motor is operated by the deviation of PID output. To avoid this, this is the function where it
conducts PID operation for the period of time set to WEB_46 PIDHoldTime, and then the motor carries out free run
and stops by the friction force of the system. If the output of Process PID is 0, the motor stops regardless of the
time set to WEB_46 PIDHoldTime.
Function
Code
Loader Display Name of Function Set Range Unit
Factory
Default
WEB_46 PIDHoldTime
PID Controller Maintenance
Time after Hold
0.0 ~ 100.0 sec 5.00
20) WEB_47 PID F/B Src : Process PID Feedback Source Setting
WEB_47 PID F/B Src is the function where the feedback source is set when Process PID controller is used. When
set to “Analog”, the definition of analog input terminal (AIO_01, AIO_13, AIO_25) is set to “Tension F/B”, and such
amount of feedback is input to the inverter. In this case, the amount of feedback is “0” unless the terminal is
defined . In case set to “Option”, it is to input the amount of feedback to inverter through communication. In this
case, the amount of feedback is “0” unless such value is input.
In case of setting to “Option”, please conduct communication cycle not exceeding 10[ms].
Function
Code
Loader Display Name of Function Set Range Unit
Factory
Default
WEB_47 PID F/B Src PID Feedback Source
Analog
Option
Analog
Line Speed from reference block
1
-1
Line Speed direction from reference block
PID output from PID block
1
-1
PID direction from
reference block
PID Type
WEB-44
If Line Speed is lower than WEB_45,
Output is WEB_45.