Allen-Bradley ClutchBrake PLC-5 Series - Ladder Logic to Simulate Rotary Cam Limit Switches

7–5Set Up or Simulate Rotary Cam Limit Switches
Publication 65566.5.1 - October 1996
Figure 7.3
AMCI
Resolver and Interface Module
AMCI Interface Module in Module Group 0
AMCI Brushless Resolver
AMCI Cable
I/O Chassis
Figure 7.4
NSD
Resolver and Converter with 1771IBD Input Module
1771IBD Input Module in Module Group 0
NSD VREP062
Resolver
NSD VE2A
Converter
NSD 3PRPT
Cable
I/O Chassis
4.Repeat step 3 if using dual resolvers.
5.For one or both I/O chassis with a resolver input, remove RCLSs
from circuit wiring by jumpering RCLS inputs to respective
power rails. For instructions to do this, refer to wiring
customization instructions, Module Group 2 (sheet 2) in chapter 3
of this manual.
6.Study the RCLS operation shown in Figure 7.1 and Table 7.B.
You will need to simulate RCLS operation with ladder logic.
We show you how in the next section.
If using resolver inputs, you must program all three of the following
command bits to simulate rotary cam limit switches shown in Figure 7.1:
Bit Address ON/OFF States
BCAM B151/00 ON - in downstroke
OFF- in all other zones
TCAM B151/01 ON - in upstroke (and ACAMopen zone)
OFF - in all other zones
ACAM B151/02 ON - in all zones except ACAMopen zone
OFF - in ACAM open zone (for at least 75 ms.)
Ladder Logic to Simulate
Rotary Cam Limit
Switches