Hardware Self-Diagnostic Function - Mitsubishi MELSEC-Q Series User Manual

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TROUBLESHOOTING

18.5 Hardware Self-diagnostic Function

(1) Hardware self-diagnostics function
Mode Diagnostic item
ROM diagnostic test
Work RAM diagnostic test
Battery-backed-up RAM
Mode 1
diagnostic test
Ethernet diagnostic test
CompactFlash
Mode 2 card interface
diagnostic test
Mode 3 RS-232 diagnostic test
Diagnostic tests of Modes 1
Mode 1+2+3
to 3
Default setting
(2) Before executing hardware self-diagnostic tests
The hardware self-diagnostics function allows the hardware check of the C Controller
module.
When the C Controller module is started up in the hardware self-diagnostic mode, the
following hardware self-diagnostic tests can be executed. (
Table18.25 Hardware self-diagnostics function
Reads the ROM data and performs a sum check.
Checks test data by writing/reading/verifying them on the work RAM.
Checks test data by writing/reading/verifying them on the battery-backed-
up RAM.
Conducts the self-loopback test of CH1 (10BASE-T/100BASE-TX
interface).
Diagnoses the status of the CompactFlash card interface.
(This test does not diagnose whether the installed CompactFlash card is
normal or abnormal. Data are not written to the CompactFlash card.)
Conducts the self-loopback test of CH2 (RS-232 interface).
Conducts diagnostic tests in order from Mode 1 to 3.
Returns the C Controller module to the factory setting state.
-
( Section 5.10)
(a) Removing modules and wiring cables
Remove all the wiring cables and modules except for the power supply module
and C Controller module from the C Controller system.
However, for execution of Mode, the self-loopback wiring cable must be
connected.
(b) Mounting in CPU slot
Mount the C Controller module in the CPU slot.
Otherwise, the hardware self-diagnostic tests cannot be executed.
Description
18.5 Hardware Self-diagnostic Function
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