Rockwell Automation 20B PowerFlex 70, PowerFlex 700 Reference Manual User Manual
Page 84
Digital Inputs
84
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
Examples of configurations that cause an alarm are:
•
User tries to configure both the “Start” input function and the “Run Forward”
input function at the same time. “Start” is only used in “3-wire” start mode,
and “Run Forward” is only used in “2-wire” run mode, so they should never be
configured at the same time
•
User tries to assign a toggle input function (for instance “Forward/Reverse”)
to more than one physical digital input simultaneously.
•
These alarms, called Type 2 Alarms, are different from other alarms in that it
will not be possible to start the drive while the alarm is active. It should not be
possible for any of these alarms to occur while drive is running, because all
configuration parameters are only changeable while drive is stopped.
Whenever one or more of these alarms is asserted, the drive ready status will
become “not ready” and the HIM will reflect a message signaling the conflict.
In addition, the drive status light will be flashing yellow.
There are three different digital input configuration alarms. They appear to the
user (in [Drive Alarm 2]) as “DigIn CflctA”, “DigIn CflctB”, and “DigIn CflctC”.
“DigIn CflctA”
indicates a conflict between different input functions that are
not specifically associated with particular start modes.
The table below defines which pairs of input functions are in conflict.
Combinations marked with a “ ” will cause an alarm.
Important:
There are combinations of input functions in
that will
produce other digital input configuration alarms. “DigIn CflctA”
alarm will also be produced if “Start” is configured and “Stop –
Clear Faults” is not.
Table 10 Input function combinations that produce “DigIn CflctA” alarm
“DigIn CflctB”
indicates a digital Start input has been configured without a
Stop input or other functions are in conflict. Combinations that conflict are
marked with a “ ” and will cause an alarm.
Acc2/Dec2
Accel 2
Decel 2
Jog
Jog Fwd
Jog Rev
Fwd/Rev
Acc2 / Dec2
Accel 2
Decel 2
Jog
Jog Fwd
Jog Rev
Fwd / Rev