8. Commissioning
GEM80-400
Page 8-2
ALSPA GEM
80-400 SERIES CONTROLLERS TECHNICAL MANUAL
Issue 3 04/99
These will allow you to write test programs for checking out the equipment. In
addition, you will need User Information Sheets or Technical Manuals, depending
on your system configuration, for:
-
Basic I/O Modules
-
Verification I/O Modules
and, optionally, in the case of Enhanced Controller systems:
-
Fast I/O Modules
-
Extra Central Highway Modules (such as IMAGEM videos, GEMLAN-D
Modules,
STARNET and so on)
8.4.
Overview of Commissioning Procedure
To commission a GEM
80 system, you need to check out everything to eliminate
errors. The larger the system, the more things there are to check.
For instance, the wireperson may have connected wires to the wrong terminals.
They may have only made one mistake in every thousand terminations, but
that's enough - your system won't work the way you expected it to until the error
has been put right. If not checked, your system might even cause serious
machinery damage by switching on wrong outputs.
So, commissioning requires a methodical, painstaking approach. Don't try to
speed up the procedure by cutting corners, or you'll land yourself with problems.
The basic principle is to start off with a small amount of equipment, check it out
thoroughly, and then, when you're 100% certain that it all works, add a bit more
equipment, check that, and so on. The recommended sequence for
commissioning is as follows:
−
Check the hardwired safety circuits into which the watchdog operates.
−
Check the power supply module.
−
Check the processor module.
−
Add to this the Basic I/O, inputs first, then outputs.
−
Add to this the Verification I/O, inputs first, then outputs.
−
Add to this the Fast I/O, again inputs first, then outputs (optional, with
Enhanced
Controller systems only).
−
Add to this the serial links to other controllers, printers or VDUs.
−
Add to this any extra Central Highway Modules, such as offline data
storage
memory, videos and
associated memory
modules, GEMLAND Modules,
STARNET Modules, etc. (again,
optional with Enhanced Controller systems only).
8.5.
Safety Circuits Checks
(1)
If possible, remove the control supply that feeds the safety circuit. If,
however, this circuit is continuously energised from a main circuit-breaker
which cannot readily be opened during commissioning, break the circuit
using any convenient contact which can be held open, such as a stop
lock-off emergency stop push-button. This is one reason why the
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