Pid Control; Intended Value Setting; Detected Value Setting - Saftronics FP5/GP5 Series Technical Manual

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Chapter 6: Programming Features
6.8

PID Control

To enable PID Control, set PID selection (n084) from 1 to 3.
Setting
0
1
2
3
Then select the PID Control intended value or detected value settings as follows.
6.8.1.

Intended Value Setting

For setting the intended value, control circuit Terminal FV voltage signal (0 to 10 V) or multi-step speed constants n025 to
n029 can be used.
Control circuit Terminal FV voltage signal: Set Operation mode selection (n002) to 2 or 3.
Multi-step speed constants (n025 to n029): Set Operation mode selection (n002) to 0 or 1. (Combination of multi-step
speed reference and jog frequency reference.)
6.8.2.

Detected Value Setting

For setting the detected value, control circuit Terminal FI current signal (4 to 20mA) or voltage signal (0 to 10 V) can be
used.
Control circuit Terminal FI current signal: Set auxiliary analog input selection (n043) to 1.
Control circuit Terminal FI voltage signal: Set auxiliary analog input selection (n043) to 0. (Cut jumper J1 on the control
PC board.)
The following shows the block diagram of PID Control.
NOTE:
1. Value I is reset to 0 in the following cases:
•
When operation stops.
•
When the integral value reset signal is input by multi-function contact input selection. (Any of constants n035 to n039 are
set to 18.
2. The upper limit of value I can be set by constant n090. Increase the value of constant n090 to upgrade control capability by
integration. If the control system vibrates and it cannot be stopped by adjusting the integral time or output lag filter time,
etc., decrease the setting of constant n090.
3.
PID Control can be canceled by a multi-function contact input signal. By setting any of constants n035 to n039 to 19, and by
closing the contact during running, PID Control is disabled and the intended value signal itself is used as a frequency
reference signal.
Firmware – S2011 and S3012
Revision: 1 (9/98)
PID disabled
PID enabled (Deviation I D-controlled.)
PID with feed forward (Feedback value is D-controlled.)
PID with feed forward (Feedback is reversed characteristics.)
Figure 49 PID Control Block Diagram
Description
58
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