STEP ET Series - Page 130

Chapter 7 Parameter Explanation
Shanghai Sigriner STEP Electric Co., Ltd.
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Figure 7-27 PID principle block diagram
Function code
Name
Setting range
Factory setting
P51.00
Closed loop control option
0~1
0
Closed loop running control options: 0: invalid; 1: valid
Function code
Name
Setting range
Factory setting
P51.01
Closed loop main reference mode
0~6
0
P51.02
Closed loop auxiliary reference
mode
0~6
2
P51.03
Closed loop auxiliary reference
operation
0~6
0
In closed loop system with feedback, if there are main and auxiliary reference, the main reference
value can be internal reference, analog, communication; the auxiliary reference value can be analog,
internal reference.
P51.01 closed loop control main reference mode is selected as follows.
0: Digital voltage pressure internal preset (P51.07); 1: A0; 2: A1; 6: Modbus communication
reference
P51.02 closed loop control auxiliary reference mode is selected as follows.
0: None; 1: A0; 2: A1; 6: Modbus communication reference
P51.03 closed loop control reference main and auxiliary operations are selected as follows.
0: No operation; 1: Main ＋ auxiliary; 2: Main - auxiliary; 5: Taking maximum value; 6: Taking
minimum value
The function of main and auxiliary operation of closed loop reference is the same as that for open
loop reference. See P50.01 for details.
Note: The closed loop control analogs such as main reference, auxiliary reference, main feedback
and auxiliary feedback cannot be set to the same channel.
Function code
Name
Setting range
Factory setting
P51.04
Closed loop main feedback mode
0~6
1
P51.05
Closed loop auxiliary feedback
mode
0~6
2
P51.06
Closed loop auxiliary feedback
operation
0~6
0