Rockwell Automation Allen Bradley 22B-A012x104, Руководство пользователя

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F-4 PID Set Up
PowerFlex 40 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22B-UM001I-EN-E
PID Reference and Feedback
Parameter A132 [PID Ref Sel] is used to enable the PID mode (A132 ¦ 0
“PID Disabled”) and to select the source of the PID Reference. If A132
[PID Ref Sel] is not set to 0 “PID Disabled”, PID can still be disabled by
select programmable digital input options (parameters
A051 - A054 ) such
as “Jog”, “Local” or “PID Disable”.
Table F.A A132 [PID Ref Sel] Options
A133 [PID Feedback Sel] is used to select the source of the PID
feedback.
Table F.B A133 [PID Feedback Sel] Options
Option Description
0 “PID Disabled” Disables the PID loop (default setting)
1 “PID Setpoint“ Selects Exclusive Control. A137 [PID Setpoint] will be used to
set the value of the PID Reference
2 “0-10V Input” Selects Exclusive Control. Selects the 0-10V Input. Note that
the PID will not function with a bipolar analog input. It will
ignore any negative voltages and treat them like a zero.
3 “4-20mA Input” Selects Exclusive Control. Selects the 4-20mA Input.
4 “Comm Port” Selects Exclusive Control. The reference word from a
communication network (see
Appendix C for details on the
reference word) such as Modbus RTU or DeviceNet becomes
the PID Reference. The value sent over the network is scaled
so that P035 [Maximum Freq] x 10 = 100% reference. For
example, with [Maximum Freq] = 60 Hz, a value of 600 sent
over the network would represent 100% reference.
5 “Setpnt, Trim” Selects Trim Control. A137 [PID Setpoint] will be used to set
the value of the PID Reference.
6 “0-10V, Trim” Selects Trim Control. Selects the 0-10V Input. Note that the
PID will not function with a bipolar analog input. It will ignore
any negative voltages and treat them like a zero.
7 “4-20mA, Trim” Selects Trim Control. Selects the 4-20mA Input.
8 “Comm, Trim” Selects Trim Control. The reference word from a
communication network (see
Appendix C for details on the
reference word) such as Modbus RTU or DeviceNet becomes
the PID Reference. The value sent over the network is scaled
so that P035 [Maximum Freq] x 10 = 100% reference. For
example, with [Maximum Freq] = 60 Hz, a value of 600 sent
over the network would represent 100% reference.
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 (see
Appendix C of the PowerFlex 40 User Manual for details on the
reference word) 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.
22B-UM001.book Page 4 Tuesday, May 30, 2017 5:22 PM