GEM80-400
8. Commissioning
Issue 3 04/99
ALSPA GEM
80-400 SERIES CONTROLLERS TECHNICAL MANUAL
Page 8-7
8.10.
Basic and Verification I/O Logic Input Checks
A GEM
80 series controller will only scan I/O addresses that are referred to in the
user ladder program.
You can therefore begin by putting in a rung which contains a number of
A-table references and outputs to an internal trash can workspace table
location (e.g. G1), such as:
|
|
+ - - < AND > - < AND > - < AND > - < AND > - < OUT > - - +
|
A0
A1
A3
A4 G1
|
Each A-table word reference will cause the controller to scan all the bits
contained in it, e.g. a reference to A3 in the ladder program will cause the
controller to scan all the bits from A3.0 to A3.15.
Note...
It should be noted that addresses above and below A3 are not scanned,
i.e. A0-A2 and A4 onwards are not scanned.
To check the I/O inputs proceed as follows:
(1)
Check that the address and range switches are correctly set up on the
8191
Verification I/O Expander for
the particular inputs you
want to check. See Chapter 3 for the addressing principles.
(2)
Check the address switches on the Basic and Verification I/O Modules.
(3)
Check address decoder switches are correctly set on I/O Subrack
backplanes
relevant to the particular inputs you want to check.
(4)
Reconnect the I/O ribbon cables at the controller.
(5)
Check that I/O ribbon cables from expanders to subracks are complete.
(6)
Check plant cabling is completed to the Basic and Verification I/O
equipment and
to the plant input transducers.
(7)
Apply plant-side power to I/O input transducers but NOT to I/O output
equipment.
(8)
Power up the GEM
80 controller.
(9)
Set the programming tool connected to the GEM
80 to 'MONITOR/EDIT GEM
80 AS DATA LIST' mode.
(10) Select the ADDRESS ENTRY mode.
(11) Check that the associated F-tables are cleared. Enter input references you
want to check, e.g. A6.0, A7.1, etc.
(12) Select MONITOR mode.
(13) Operate the plant devices one at a time.
