Installation manual

2-12 PowerFlex
®
700H Control Wiring
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”), parameter 96 [TB Man Ref Sel] is set to the
same input. To switch between Auto and Manual, parameter 364 [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. Parameter 192 [Save HIM Ref] can enable manual mode to allow starts
and jogs from the HIM in 2-wire mode.