Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 46)

Voting Processor Firmware
Chapter 5
5Ć7
Figure 5.3
Operational Sequence for Downstroke in Single Mode
Select single mode
Is the shaft near the top?
Have all operators released all
RUN buttons?
Has each operator pressed his
RUN buttons simultaneously,
and within 5 seconds for all
stations?
Both voting processors
energize their solenoid triacs to
actuate the clutch for the
downstroke Has an operator released a
RUN button?
Select inch mode and position the
shaft near the top.
NOTE: Releasing a RUN button during the downstroke stops the press. If the shaft does
not reach the nearĆbottom zone, operators may resume the downstroke. If the shaft
reaches the nearĆbottom zone, an operator must inch the press back to the nearĆtop
position. 12262
No
Yes
Yes
No
Is the shaft past the near
bottom zone?
Start upstroke.
Go to figure 5.4
Both voting processors
deĆenergize their solenoid
triacs to stop the shaft. A stop
condition message is
displayed.
Yes
Did the shaft coast into the
near bottom zone while
breaking?
Have all operators released all
RUN buttons?
Has each operator pressed his
RUN buttons simultaneously,
and within 5 seconds for all
stations?
CAUTION: Releasing a RUN
button late in the downstroke
can damage the press
No
No
Yes
No
Yes
No
Yes
Yes
Start onĆtheĆhop
downstroke.
From figure 5.4
No
Yes
Main Motor Forward
Yes
No