Sinee EM500 - PID Positive;Negative Action

EM500 Open-Loop Vector Control Inverter User Manual
248
the status of the input function “PID Positve/Negative Action Switch” together. See Table
7-12 for their relationship details
Table 7-12 PID Positive/Negative Action
F09.04
44: PID Positive/Negative
Action Switch
Action mode
Description
0
0
Positive Action
Positive offset and output
0
1
Negative Action
Positive offset, but negative
output
1
0
Negative Action
Positive offset, but negative
output
1
1
Positive Action
Positive offset and output
Note: The offset is usually “Setting - Feedback” in PID control.

When feedback signal is greater than PID setting, inverter’s output frequency
is required to decrease to make PID reach to a balance. When pressure is higher, the
pressure feedback is greater. In this case, inverter’s output frequency falls to reduce
the pressure and make it constant. PID should be set as positive effect.

When feedback signal is greater than PID setting, it’s required to increase
inverter output frequency to balance PID. An example is given about supply control:
PID regulator shall be in the negative action control
No.
Function
Range
Unit
Default
Type
F09.05
Proportional Gain 1
0.00 - 100.00
0.40
●
F09.06
Integral Time 1
0.000 - 30.000，0.000: No Integral
s
10.000
●
F09.07
Differential Time 1
0.000 - 30.000
ms
0.000
●
F09.08
Proportional Gain 2
0.00 - 100.00
0.40
●
F09.09
Integral Time 2
0.000 - 30.000，0.000: No Integral
s
10.000
●
F09.10
Differential Time 2
0.000 - 30.000
ms
0.000
●
F09.11
PID Parameter
Switching
0: Disabled
1: Switching through Numeric Input
Terminal
2: Automatic Switching by Offset
0
●
F09.12
PID Parameter
Switching Offset 1
0.00 - F09.13
%
20.00
●
F09.13
PID Parameter
Switching Offset 2
F09.12 - 100.00
%
80.00
●