Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 44)

Voting Processor Firmware
Chapter 5
5Ć5
Inch and MicroĆinch Modes
Use inch or micro-inch mode before entering single or continuous mode
to position the shaft near the top, or for machine tool set-up. You may jog
the shaft either forward or in reverse. The shaft stops when it moves into
the near top position or when you release an INCH button.
Figure 5.2
Operational Sequence for Inch or MicroĆInch Mode
Select inch or microĆinch
mode
Has an operator released
both INCH buttons?
Has an operator pressed
both INCH buttons
simultaneously?
Both voting processors
energize their solenoid triacs
to actuate the clutch
Has the shaft moved into its
nearĆtop position?
Has an operator released
either INCH button?
Both voting processors
deĆenergize their solenoid
triacs to stop the shaft in its
nearĆtop position
WARNING: If the shaft
coasted past its nearĆtop
position while braking, the
brake is faulty and
hazardous. Repair it
immediately.
WARNING: To guard against the
possibility of personal injury, install a
keylock mode select switch so that only
supervisory personnel can select inch
mode.
NOTE: Use inch or microĆinch mode to position the shaft near the top. Operators may
jog the shaft in either direction. The shaft stops when it moves near top position or
when an operator released an INCH button.
12261
No
No
Yes
Yes
No
Yes
Yes
No
Clutch/Brake Operating Modes