Rockwell PowerFlex 70 User Manual

C-12 Application Notes
PI Enable
The output of the PI loop can be turned on (enabled) or turned off
(disabled). This control allows the user to determine when the PI loop is
providing part or all of the commanded speed. The logic for enabling the
PI loop is shown in below.
The drive must be running for the PI loop to be enabled. The loop will be
disabled when the drive is ramping to a stop, jogging or the signal loss
protection for the analog input(s) is sensing a loss of signal.
If a digital input has been configured to “PI Enable,” two events are
required to enable the loop: the digital input must be closed AND bit 0 of
the PI Control parameter must be = 1.
If no digital input is configured to “PI Enable,” then only the Bit 0 = 1
condition must be met. If the bit is permanently set to a “1”, then the
loop will become enabled as soon as the drive goes into “run”.
Drive
Running
Drive
Ramping
to Stop
Drive
Jogging
Bit 0 of
[PI Control] = 1
(enabled) Signal Loss
The Configured
Digital Input
is Closed
A Digital Input
is Configured
to PI Enable
"Enabled" Status
Digital Input
is Reflected
in [PI Status]
Bit 0 = 1
The PI Loop
is Enabled
PI Enabled
Spd Cmd
PI Output
PI Pre-load Value
PI Pre-load Value = 0 PI Pre-load Value > 0
Pre-load to Command Speed
PI Enabled
Spd Cmd
PI Output
Start at Spd Cmd
-100.0 -75.0 -50.0 -25.0 0.0 25.0 50.0 75.0 100.0
Normalized Feedback
Normalized SQRT(Feedback)
-100.0
-75.0
-50.0
-25.0
0.0
25.0
50.0
75.0
100.0

Rockwell PowerFlex 70 Specifications

General

Brand	Rockwell
Model	PowerFlex 70
Category	Controller
Language	English