5.Description of Function Codes
EM12 User's Manual
80
bC-25
Power-on time of 1st fault
Default
0
bC-26
Running time of 1st fault
Default
0
Description
bC-11~bC-26 same as bC-03~bC-10.
5.14 Group bd Motor protection
bd-00
Overset alarm current value
Default
0.00
Setting Range
0.0~600A
bd-01
Overcurrent alarm delay time
Default
0.00
Setting Range
0.0~600s
For example: 4KW inverter rated current is 9A, customer site needs to protect motor when load current is at 6A
more than 5s, corresponding setting parameters: bd-00=6.00A and bd-01=5.0S exceeds current and time panel
display Err24 protection error and stop.
5.15 Group C0: Process Control PID Function
PID control is a general process control method. By performing proportional, integral and differential operations
on the difference between the feedback signal and the target signal, it adjusts the output frequency and constitutes
a feedback system to stabilize the controlled counter around the target value.
It is applied to process control such as flow control, pressure control and temperature control. The following
figure shows the principle block diagram of PID control.
Diagram 5-25 Principle block diagram of PID control.
C0-00
PID setting source
Default
7
Setting
Range
0
C0-01
1
AI1
2
AI2
3
AI3
4
Pulse setting (HDI)
5
Communication setting
6
Multi-function
7
New mode(pressure value)
C0-01
PID digital setting
Default
50.0%
Setting Range
0.0%~100.0%
C0-00 is used to select the channel of target process PID setting. The PID setting is a relative value and ranges
from 0.0% to 100.0%. The PID feedback is also a relative value. The purpose of PID control is to make the PID
setting and PID feedback equal.
C0-02
PID setting change time
Default
0.00s
Setting Range
0.00s~650.00s
Summary of Contents for EM12 Series
Page 5: ......
