Pid Control Function; Process Pid Control - Toshiba TOSVERT VF-PS1 Instruction Manual

2. PID control function

VF-AS1 and VF-PS1 have three types of PID control functions.
You can select the type of PID control for applications by setting parameter.

2.1. Process PID control

Process PID control is selected for temperature or pressure control of fan and pump, which is performed
gently in response to change the speed.
[Process PID control (f359=1)]
[Diagram]
Process upper limit
(f367)
Process value
Process lower limit
(f368)
Feedback value
[Parameter setting]
See the chapter 4 and 5 for detail of parameter setting.
1) Select the PID control type.
Title
f359
2) Select the input of process value and feedback value.
You need to convert temperature or pressure into frequency for setting.
Process value
Feedback value
Frequency free unit covertion function enables to set process value and feedback value easily
See the chapter 7 for detail.
3) Set the following parameters to suit the motor if necessary.
f270～f275
PID deviation upper limit
(f364)
PID control
－
PID deviation lower limit
(f365)
Function
PID control switching
Item Title
fmod
f207
f360
Title
Maximum frequency
fh
ul Upper limit frequency
ll Lower limit frequency
Jump frequency 1 to 3
f240
Operation starting frequency
f241
Operation starting frequency hysteresis
f243
Stop frequency setting
PID output upper limit
(f370)
PID output lower limit
(f371)
Setting
1(process PID control)
Function
Frequency setting mode selection 1
Frequency setting mode selection 2
PID control feedback control signal selection
Function
3
E6581329①
Output frequency upper limit
(ul)
Increase/
Jump
decrease rate
frequency
processing
Output frequency lower limit
(ll)
,