1-22
Installation/Wiring
PLC = Auto, HIM = Manual
A process is run by a PLC when in Auto mode and requires manual
control from the HIM during set-up. The Auto speed reference is issued
by the PLC through a communications module installed in the drive.
Since the internal communications is designated as Port 5, [Speed Ref A
Sel] is set to “DPI Port 5” with the drive running from the Auto source.
Attain Manual Control
•
Press ALT then Auto/Man on the HIM.
When the HIM attains manual control, the drive speed command
comes from the HIM speed control keys or analog potentiometer.
Release to Auto Control
•
Press ALT then Auto/Man on the HIM again.
When the HIM releases manual control, the drive speed command
returns to the PLC.
PLC = Auto, Terminal Block = Manual
A process is run by a PLC when in Auto mode and requires manual
control from an analog potentiometer wired to the drive terminal block.
The auto speed reference is issued by the PLC through a
communications module installed in the drive. Since the internal
communications is designated as Port 5, [Speed Ref A Sel] is set to “DPI
Port 5” with the drive running from the Auto source. Since the Manual
speed reference is issued by an analog input (“Analog In 1 or 2”), [TB
Man Ref Sel] is set to the same input. To switch between Auto and
Manual, [Digital In4 Sel] is set to “Auto/ Manual”.
Attain Manual Control
•
Close the digital input.
With the input closed, the speed command comes from the pot.
Release to Auto Control
•
Open the digital input.
With the input open, the speed command returns to the PLC.
Auto/Manual Notes
1.
Manual control is exclusive. If a HIM or Terminal Block takes
manual control, no other device can take manual control until the
controlling device releases manual control.
2.
If a HIM has manual control and power is removed from the drive,
the drive will return to Auto mode when power is reapplied.
3.
[Save HIM Ref], parameter 192 can enable manual mode to allow
starts and jogs from the HIM in 2-wire mode.
Auto/Manual Examples
Summary of Contents for Allen-Bradley PowerFlex 700 B Series
Page 10: ...P 6 Overview Notes ...
Page 36: ...1 26 Installation Wiring Notes ...
Page 118: ...3 78 Programming and Parameters Notes ...
Page 162: ...A 28 Supplemental Drive Information Notes ...
Page 227: ......