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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)
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
PC 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