Rockwell Automation 25B PowerFlex 520-Series Adjustable Frequency AC Drive User Manual - Manual (Page 218)

218 Rockwell Automation Publication 520-UM001G-EN-E - September 2014
Appendix F PID Set Up
A460 and A472 [PID x Fdback Sel] are used to select the source of the PID
feedback.
Analog PID Reference Signals Parameters t091 [Anlg In 0-10V Lo] and t092 [Anlg In 0-10V Hi] are used to
scale or invert an analog PID Reference or PID Feedback.
Scale Function
For a 0...5V signal, the following parameter settings are used so that a 0V signal =
0% PID Reference and a 5V signal = 100% PID Reference.
• t091 [Anlg In 0-10V Lo] = 0.0%
• t092 [Anlg In 0-10V Hi] = 50.0%
• A459 [PID 1 Ref Sel] = 5 “0-10V Input”
Invert Function
For a 4-20 mA signal, the following parameter settings are used so that a 20 mA
signal = 0% PID Reference and a 4 mA signal = 100% PID Reference.
• t092 [Anlg In4-20mA Lo] = 100.0%
• t096 [Anlg In4-20mA Hi] = 0.0%
A460, A472 [PID x Fdback Sel] Options
Options Description
0 “0-10V Input” Selects the 0-10V Input (default setting). Note that the PID will not function with a bipolar analog
input. It will ignore any negative voltages and treat them like a zero.
1 “4-20mA Input“ Selects the 4-20 mA Input.
2 “Serial/DSI” Serial/DSI will be used as an input for the PID Feedback.
3 “Network Opt” The reference word from a communication network option becomes the PID Reference.
4 “Pulse Input” Pulse train will be used as an input for the PID Feedback.
5 “Encoder”
(1)
(1) Setting is specific to PowerFlex 525 drives only.
Encoder will be used as an input for the PID Feedback.
6 “Ethernet/IP”
(1)
Ethernet/IP will be used as an input for the PID Feedback.
0 10 20 30 40 50 60 70 80 90 100
PID Reference (%)
Input V
olts
2
4
6
8
10
12