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MELSEC-Q

8 TROUBLESHOOTING

8.6 H/W Information

H/W information screen displays details of the LED and switch information of the
network modules. To display the H/W information screen, click the H/W information

button on the system monitor window of GX Developer.

(1) H/W information on the master module

1) -a

1) -b

2) -b

2) -a

The following explains each of these items.

1) H/W LED information

The following table lists the LED information on the master module.
The value for each item is displayed as: 0001 on, 0000 off.

Item Description

PLC to PLC network: on

REMOTE

Remote I/O network: on

DUAL

In multiplex transmission: on

SW. E

Switch setting error: on

M/S. E.

Duplicate station number or remote master station on same network: on

PRM. E.

Parameter error: on

MNG

Remote master station set or multiplexed remote master station performing
master operation: on

S. MNG

Multiplexed remote master station performing master operation: on

D. LINK

In data link: on

T. PASS

Baton pass participation: on

CRC

Error during code check of receiving data: on
1)-a: Forward loop

1)-b: Reverse loop

OVER

Error when receive data processing has been delayed: on
1)-a: Forward loop

1)-b: Reverse loop

AB.IF.

Error when "1" over specification is continuously received or when the
received data length is short
1)-a: Forward loop

1)-b: Reverse loop

TIME

Error when data link monitor timer has operated: on
1)-a: Forward loop

1)-b: Reverse loop

DATA

Error when error data of 2k-byte or more has been received: on
1)-a: Forward loop

1)-b: Reverse loop

UNDER

Error internal processing of send data is not fixed interval: on
1)-a: Forward loop

1)-b: Reverse loop

LOOP

Error when there is loop error: on
1)-a: Forward loop

1)-b: Reverse loop