Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 43)

Voting Processor Firmware
Chapter 5
5Ć4
Figure 5.1
Cam Limit Switch Settings
Near Top
Position
Run - On
Near Bottom
Zone
Upstroke
Anti - Repeat
before run-on contacts make, or the controller faults.
Run-on contacts must make (not necessarily at the same time)
before
Anti-repeat contacts must break for at least 70ms during
upstroke, then make before run-on contacts break, or the controller faults.
Anti-repeat contacts must make (not necessarily at the same time)
before run-on contacts break, or the controller faults.
Run-on contracts must break (not necessarily at the same time)
MAKE
MAKE
MAKE
BREAK
MAKE
MAKE
BREAK
MAKE
MAKE
MAKE
MAKE
BREAK
MAKE
MAKE
BREAK
BREAK
BREAK
BREAK
Down-
stroke
Near
Bottom
Up-
stroke
Near
Top
Run-On Anti-
Repeat
Zone
Comments
Cam Linit Switch Settings
Refer to Diagnostic Messages, table 7.C. Hex codes 80 thru AA, for descriptions of faults caused
by cam limit switches.
12970
70 ms
NOTE:
Install two mechanically independent cam limit switch assemblies each with three cams and three
limit switches. Set the assemblies to similar settings according to the requirements of your press.
You can set cam limit switches to other configurations provided they meet the make/break conditions
listed below:
Downstroke
Top-Stop
-Check
TopĆstopĆcheck contacts must make (not necessarily at the same time)
TopĆstopĆcheck contacts break, or the controller faults.
TopĆstopĆcheck contacts must break (not necessarily at the same time)
before antiĆrepeat contacts break or the controller faults.
before TopĆstopĆcheck contacts make or the controller faults.
Top-stop-
check
Table 5.A
Operation of Cam Limit Switches
This
Cam
In this
Mode
With these
Conditions Provides the PM Module a Signal:
AntiĆ
Repeat
OnĆtheĆhop single
stroke
Run buttons released
past bottom
To allow a second stroke when run buttons
are pressed a second time
RunĆon Inch and MicroĆinch
(forward) and Single
stroke
Cam opens at nearĆtop
position To turn OFF triac output for
stopĆonĆtop (cycle stop)
Continuous Cam opens at nearĆtop
position after
stopĆonĆtop command
Single stroke and
Continuous
Cam closes at
nearĆbottom position
To let operator release any depressed run
buttons without interrupting a single stroke
or continuous stroking
TopĆStop
Check
any Cam closes during
stopĆonĆtop
To energize a Brake Fault output to warn
that the brake is faulty (Hazardous
Condition)
Inch and
MicroĆinch
(reverse)
Cam opens in nearĆtop
position
To turn OFF solenoid outputs to stop the
cycle