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14. TROUBLESHOOTING
MELSEC-A
14.2 Checking ACPU's Operation
When an error has occurred within the PC CPU when a G-controller module
is started or executing monitoring, the following occurs.
When started up: The display gives an error message and its corrective
action.
When monitoring: An error alarm is given or a message is given on the system
alarm screen.
Follow the corrective procedure or read the User's Manual of the PC CPU to
eliminate the cause of the error.
14.3 Module Installation, Switch Settings, and ROM or Memory Card Installation
•
(1)
Installation of the module
The G-controller module must be installed securely to the base unit as
described in the PC CPU's User's Manual.
(2)
Switch settings
Switch settings must be done according to section 4.
After completing switch settings, start up PC CPUs and G-controller
modules.
The G-controller modules RUN/STOP keyswitch and setup switches
(SW5-[]) must be set as follows:
(a) RUN/STOP keyswitch
Set the switch in accordance with the mode the G-controller module
was in at start-up.
Mode
at
Start-up
RUN/STOP
RUN LED
Keyswitch
Key input enabled
RUN
Monitor mode-
ON
Key input disabled
KEY-LOCK
Stop mode
-
STOP
OFF
(b) Setup switch (SW5-1)
When starting up the G-controller module by using canvas ROM
monitor data, set the switch in accordance with the type of canvas
ROM.
ROM Type
SW5-1
SW5-5
64K. WROM
OFF
128K. WROM
OFF
256K. WROM
ON
If the type of ROM is different from switch setting, an error message
may be displayed when the G-controller module is started or in-
definite data may be displayed or printed during monitoring.
14-3
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