7–9Set Up or Simulate Rotary Cam Limit Switches
Publication
65566.5.1 - October 1996
The software is designed to fault when it sees conditions other than
the correct progression of these three rotational zones during a press
stroke:
•Top zone
•Downstroke
•Upstroke
Important: The software reads these zones according to the on/off
positions of ACAM, BCAM, and TCAM switches that you set
(Figure 7.1) mechanically for hardware switches or that the
software reads from resolver inputs if using resolvers to simulate
your RCLSs.
During each stroke, the rotary cam limit switches must cycle as
follows (linear representation of Figure 7.1):
Near Top Zone Downstroke Zone Upstroke Zone
BCAM
TCAM
ACAM
Off
Off
On
Off
On
On
BCAM and TCAM can transition within the
same scan or overlap their On states.
*
*
When the software detects any one of the following fault conditions,
it is designed to turn outputs off and set the corresponding fault bit in
B168:
When the software
detects this condition:
It turns outputs Off and sets
this fault bit for Processor A
and this fault bit for
Processor B (B168/xxx):
All three limit switches go Off 026 106
BCAM turns Off before
TCAM turns On (at bottom)
28 108
BCAM On when ACAM is Off 26, 33 106, 113
ACAM does not cycle
during upstroke
034 114
Important: The ladder logic for turning outputs off and setting fault
bits is factory configured for you. No programming is required.
Important: For suggestions on troubleshooting your position
monitoring devices, continue to the next section. For the complete
listing of fault codes, refer to appendix C, Fault Codes and Operator
Prompts.
How Transition Faults
Stop the Press
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