Q12Dccpu-V - Mitsubishi Electric MELSEC Q Series User Manual

6.5.2

Q12DCCPU-V

(1) Diagnostics types
In the hardware diagnostics test, diagnostics on the following items are performed.
7-segment LED
Mode
display
0 00
1 01
2 02
3 03
4 04
5 05
6 06
7 07
(2) Operating procedure
(a) Preparation
Before performing the hardware diagnostics test on the Q12DCCPU-V, take the steps listed below:
1.
Install the module.
Install the power supply module and the Q12DCCPU-V to the base unit.
Insert the Q12DCCPU-V into the CPU slot.
Do not install any module other than a power supply module and the Q12DCCPU-V.
● For Q12DCCPU-V (Extended mode) with a serial number whose first five digits are "15102" or higher, the hardware
diagnostics can be executed even if the module is mounted on the slot other than the CPU slot. When executing the
hardware diagnostics with mounting Q12DCCPU-V (Extended mode) other than CPU slot, mount another CPU module
on the CPU slot.
• Although an error may be detected on the CPU mounted on the CPU slot, the hardware diagnostics can be
executed.
2.
Check the wiring.
Check that the power supply wiring is property arranged.
Do not connect any cable other than power supply cables.
3.
Prepare for respective diagnostics as necessary. ( Page 77, (2)(b) in this section)
4.
Power on.
Check that the power supply voltage is within the specified range.
Check that the RUN/STOP/MODE switch is positioned in STOP.
80
Diagnostic item
Diagnostic test of Mode 1 to
Mode 6
ROM diagnostic test
Work RAM diagnostic test
Battery backup RAM
diagnostic test
Ethernet diagnostic test
CompactFlash card
interface diagnostic test
RS-232 diagnostic test
USB diagnostic test
Bus diagnostic test
7-segment LED test
Conducts tests in the order from Mode 1 to Mode 6.
Reads the ROM data and performs error detection.
Checks test data by writing/reading/verifying them on the work RAM.
Checks test data by writing/reading/verifying them on the battery backup
RAM.
Diagnoses the status of the Built-in Ethernet port (CH1 and CH2).
Diagnoses the Compact flash card slot status.
Conducts a self-loopback test of RS-232 connector (CH3).
The wiring for self-loopback is required.
Diagnoses the status of the USB connector.
Writes/reads/verifies the memory of the internal bus and register.
Shows the 7-segment LED test display.
Description