Startup Procedures - Parker H Series Installation & Service Instructions Manual

Safety Guidelines for the Application, Installation and Maintenance of Solid State Control

4.6 Startup Procedures

Checks and tests prior to startup and startup procedures
recommended by the manufacturer should be followed.
C.4.6 Startup Procedures
Startup procedures can provide important benefits for
safety with new installation, or after modifications or
repairs. A "dry run" under controlled conditions can verify
proper installation and functioning of the control system
before it is turned over to operating personnel.
Many programmable solid state systems have the
capability for simulating operation in a mode known as
"test" mode or "dry run" mode. These modes allow a user
to check a program and correct obvious programming
errors with outputs disabled. Unexpected machine motion
and possible damage to workpieces and equipment is
thus avoided. These modes can also be used to verify
proper system operation after a repair.
Many programmable systems provide capability for "force
on" and "force off" of inputs and outputs. Use of these
functions can reduce troubleshooting and maintenance
time by enabling personnel to bypass certain operations
without physically operating switches on a machine. Care
must be taken when using "force" functions to avoid
exposing personnel to hazardous machine motions or
process operations.
For controllers operating a machine tool or robot, running
a part program at a fraction of the programmed operating
speed with a workpiece of soft material is considered
"good practice". This allows an operator to observe possible
interference of tooling with the part and make corrections
to the program. A workpiece of soft material such as
wood, plastic, or machinable wax will minimize risk of tool
damage if there is a tool crash with the workpiece.
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