Rockwell Automation Reliance Electric MD65, User Manual

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I-4
MD65 AC Drive User Manual
PID Feedback Sel (A133) is used to select the source of the PID
feedback.
Table I.2 – PID Feedback Sel (A133) Options
Analog PID Reference Signals
Parameters Anlg ln 0-10V Lo (A110) and Anlg ln 0-10V Hi (A111)
are used to scale or invert an analog PID Reference.
Important: Firmware version FRN 1.xx does not support
PID Feedback scaling from an analog input.
Examples
Scale Function
For a 0-5 volt signal, the following parameter settings are used so
that a 0 volt signal = 0% PID Reference and a 5 volt signal = 100%
PID Reference.
• Angl ln 0-10V Lo (A110) = 0.0%
• Angl ln 0-10V Hi (A111) = 50.0%
• PID Ref Sel (A132) = 0 “0-10V Input”
Option 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 4-20mA Input.
2 “Comm Port” The reference word from a communication network such as
Modbus RTU or DeviceNet becomes the PID Feedback. The
value sent over the network is scaled so that P035 [Maximum
Freq] x 10 = 100% Feedback. For example, with [Maximum
Freq] = 60 Hz, a value of 600 sent over the network would
represent 100% Feedback.
0 10 20 30 40 50 60 70 80 90 100
PID Reference (%)
Input V
olts
2
4
6
8
10
12