Mitsubishi Electric MELSEC Q Series Reference Manual page 316

• When station No. 1, 2, and 4 are monitored
The IN-side cable insertion error status of station No. 3 is stored into the link special register (SW) in
values as shown below.
No.
SW0080
SW0081
SW0082
The OUT-side cable insertion error status of station No. 3 is stored into the link special register (SW) in
values as shown below.
No.
SW0070
SW0071
SW0072
• When station No. 3 is monitored
Since station No. 3 is disconnected from the network, the values are stored into the link special register
(SW) as shown below.
No.
SW0064
(b) Checking for cable disconnections and cable insertion errors of own station
1.
When there is a cable disconnection or cable insertion error, Own station's loop status (SB0064) is
turned ON.
2.
The status of cable disconnections and cable insertion errors can be checked in Own station's
loop status (SB0064).
The status of cable insertion errors can also be checked with the following link special relay (SB).
• Own station's IN-side cabling status (SB006A)
• Own station's OUT-side cabling status (SB006B)
3.
The cable disconnection detection count can be checked with the following link special register
(SW).
• IN-side cable disconnection detection count (SW0074)
• OUT-side cable disconnection detection count (SW0084)
4.
When Clear IN-side transmission error counter (SB0007) is turned ON, IN-side cable disconnection
detection count (SW0074) can be cleared.
When Clear OUT-side transmission error counter (SB0008) is turned ON, OUT-side cable
disconnection detection count (SW0084) can be cleared.
No.
SB0007 Clear IN-side transmission error counter
SB0008 Clear OUT-side transmission error counter
SB0064 Own station's loop status
SB006A Own station's IN-side cabling status
SB006B Own station's OUT-side cabling status
314
Description
OUT-side loopback station No.
OUT-side loopback factor
IN-side mis-cabling station No.
Description
IN-side loopback station No.
IN-side loopback factor
OUT-side mis-cabling station No.
Description
Own station's loop status
Description
—
No.
—
SW0064 Own station's loop status
—
SW0074 IN-side cable disconnection detection count
SW0084 OUT-side cable disconnection detection count
Value to be stored
4
30
H
3
Value to be stored
2
03
H
3
Value to be stored
33
H
Description