Emerson PCM-22, Manual

Page: 69 / 110

PCM-22 Software Setup
P/N 400274-01 Revision A7 61
is always functional. See Master Length Lower Limit and the CQ serial
command.
66 Cycle Error
This output function activates in situations where a serious profile error
was detected and it is not possible for the PCM-22 to execute the
specified profile.
1) Activates when a cycle is started without executing a
Home or Index
reference move first. In this case, a F External Distance Error fault
will occur and the
CQ
serial command will return zero. See
Homes
and the Follower Zero Position
.
2) Activates when a cycle is starting if a Cycle Inter-Relationship
problem is detected. In this case the PCM-22 will stop the cycle
without initiating motion. The CQ serial command will have flags set
indicating where the problem is.
3) Activates when excessive Follower Phase Variation, Master Phase
Variation, Follower Length or Master Length change is detected. This
causes the next Master Length , next Follower Length or the next
Cycle Point to become less than the corresponding Master/Follower
Length Lower Limit . In order to attempt to control the situation, the
average length will be used and the phase will be temporarily
changed. The output will be latched active even if the situation was
controlled. It is up to the user to decide how to handle this error
condition when a cycle is executing. The CQ serial command will have
flags set indicating where the problem is. Other than user changes,
the primary causes of this would be too small of a Working Segment
for the Follower velocity required, encoder slippage, mechanical
failure, noisy sensors or low averaging in the Follower profile.
4) Activates when a Missing Master Sensor or Missing Follower Sensor
condition is detected. The serial command CQ will return 0x810 or
0x820, respectively, indicating this. The output will be deactivated if
the situation was corrected.
5) Activates when a cycle is stopping and an active cycle limit flag is
detected. The CQ serial command will have flags set indicating where
the problem is.
It may be active after the cycle has ended. See
Cycle Limit Reached
and
Maximum Master Velocity
.
71 Cycle Dropped Out
Activates after the Cycle Drop Out input was activated and the Follower
axis has arrived at the Cycle Drop Out Position . Please note that if the
Master sync source stops while the Cycle Drop Out input is activated,
but before the dropout position is reached, the output will not activate . It
may be active after the cycle has ended if used in conjunction with Cycle
Exit .