Observe Control Motion; Allen-Bradley Plcs - Allen-Bradley SLC 500 User Manual

7. Observe Control Motion

Allen-Bradley PLCs

Now that program execution has been verified, checkout of control
motion can begin. All persons involved with the programming,
installation, layout design, machine or process design and
maintenance should be involved in making decisions for determining
the best and safest way to test the total system.
The following procedures are general in nature. Individual conditions
may warrant their modification. The basic approach is to initiate
testing with the least amount of machine motion. Only some outputs
are allowed to generate machine motion. Then additional machine
motion can be gradually added, thereby allowing any problems to be
detected more easily under controlled conditions. The following
procedure provides the steps for testing machine motion using one
output at a time.
During all phases of checkout, station a person ready
ATTENTION
to operate an emergency-stop switch if necessary.
The emergency-stop switch will de-energize the
!
master control relay and remove power from the
machine. This circuit must be hardwired only, it must
not be programmed.
Use the following procedures:
1. Identify the first output device to be tested and reconnect its
wiring.
Contact with AC line potential may cause injury
ATTENTION
to personnel. When reconnecting wiring, make
sure that the AC power disconnect switch is
!
opened.
Starting Up Your Control System
Publication 1747-UM011C-EN-P - December 2001
8-11