8
- 47
8.3 Using Link Special Relay (SB) and Link Special Register (SW)
8
PROGRAMMING
(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 count (SB0007) is turned ON, IN-side
cable disconnection detection count (SW0074) can be cleared.
When Clear OUT-side transmission error count (SB0008) is turned ON,
OUT-side cable disconnection detection count (SW0084) can be cleared.
Table 8.23 SB/SW used in checking for cable disconnections and cable insertion errors of own station
No.
Description
No.
Description
SB0007
Clear IN-side transmission error count
—
SB0008
Clear OUT-side transmission error count
SB0064
Own station's loop status
SW0064
Own station's loop status
SB006A
Own station's IN-side cabling status
—
SB006B
Own station's OUT-side cabling status
—
SW0074
IN-side cable disconnection detection count
SW0084
OUT-side cable disconnection detection count
Summary of Contents for QJ71GP21-SX
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