Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 434

8 TROUBLESHOOTING
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Item
CRC During received data code check errors: Illuminated
1)-a: Forward loop side, 1)-b: Reverse loop side
OVER During delayed received data processing errors: Illuminated
1)-a: Forward loop side, 1)-b: Reverse loop side
AB.IF. When errors are triggered owing to values other than the stipulated "1" are received
consecutively, and when errors are triggered owing to the length of the received data being too
short: Illuminated
1)-a: Forward loop side, 1)-b: Reverse loop side
TIME When errors are triggered owing to the data link monitoring timer being activated: Illuminated
1)-a: Forward loop side, 1)-b: Reverse loop side
DATA When errors are triggered owing to abnormal data exceeding 2kbytes has been received:
Illuminated
1)-a: Forward loop side, 1)-b: Reverse loop side
UNDER When errors are triggered owing to the internal processing of transmission data not being
completed within the specified period of time: Illuminated
1)-a: Forward loop side, 1)-b: Reverse loop side
LOOP When errors are triggered owing abnormalities on the loop: Illuminated
1)-a: Forward loop side, 1)-b: Reverse loop side
2) H/W switch information
Displays the switch information for the network module.
2)-a: Displays the switch settings for the H/W mounted on the network
module.
Item
STx10 Position 10 of the station number setting switch
STx1 Position 1 of the station number setting switch
MODE Mode setting switch
2)-b: Displays the switch information actually set up on the network module.
Item
NETNO. Network number setting
GRPNO. Group number setting
STNO. Station number setting
MODE Operation mode setting
BAUD Communication speed
CONFIG Station type, controlled station operations
during recovery, transmission mode settings
Description
Description
Description
MELSEC-Q
Display range
0 to 239
0 to 9
1 to 64
0: On-line
7: Self loop-back test
8: Internal self loop-back test
9: Hardware test
Optical loop Coaxial bus
0: 10 Mbps 0: 10 Mbps
1: 25 Mbps
b15 b8 b7 b5
All "0" Empty
Controlled station
operations
0: Switched
1: Not switched
Transmission mode
0: On-line mode (start)
1: Debug mode (stop)
Twisted bus
0: 156Kbps
1: 312Kbps
2: 625Kbps
3: 1.25Mbps
4: 2.5Mbps
5: 5Mbps
6: 10Mbps
b0
Station type
0: Normal station
1: Controlled station
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