Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 18)

Clutch/Brake Controller Hardware
Chapter 3
3Ć9
Important: There is no backplane switch setting to configure the optional
dump valve circuit. You configure the optional dump valve circuit by
inserting dump valve modules (cat. no. 1771-OD and 1771-IA) into
module group 4, slots 0 and 1, respectively of chassis A and B. You must
also set bit 14 unconditionally in your configuration rungs.
Important: To configure your clutch/brake controller for Micro-inch, see
chapter 4 “Module Group 5, Slot 0 Reserved for Micro-inch”.
Important: Your PLC ladder program must include unconditioned
configuration rungs that set or reset configuration bits to match the
settings of backplane switches. Refer to chapter 4.
Establish the address of chassis A and B in each clutch/brake module so
the PLC can communicate with it. Use valid rack addresses as
determined by your PLC.
Switch assembly SW-1 determines the rack address. It is located under a
sliding cover plate on the left side of the clutch/brake module near the top.
Loosen the two screws holding the cover plate and slide it open. Locate
switch assembly SW-1 at the top of the printed circuit board as shown in
Figure 3.4.
Using switch assembly SW-1, designate chassis A and B as follows:
Chassis A - any rack address having position 6 OFF
Chassis B - next consecutive upper or lower rack address
Important: If your ladder program monitors rack adapter fault bits for
each chassis containing a clutch/brake module, the fault bits will indicate
a faulted rack whenever the module trips power to I/O swingarms. This is
because clutch/brake modules stop all communciation with the PLC until
they verify that swingarm power has been disconnected.
Important: Always configure I/O racks assigned to clutch/brake
controllers as full racks, so the PLC can write configuration bits to each
PM chassis in Module Group 7.
Rack Address
of Chassis A and B