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MELSEC-Q
APPENDICES
Table 3 Link special register (SW) list (Continued)
No. Name Description
Availability
Control
station
Normal
station
Remote
master
station
Remote I/O
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
3
SW00BD
(189)
Timeout on the forward
loop side (TIME)/ coaxial
bus timeout (TIME)
Accumulates and stores the number of "TIME" errors on the
forward loop side for the optical loop, or the number of "TIME"
errors of the coaxial bus for the coaxial bus.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00BE
(190)
Receiving 2k bytes or
more on forward loop side
(DATA)/coaxial bus
receiving 2k bytes or
more (DATA)
Accumulates and stores the number of "DATA" errors on the
forward loop side for the optical loop, or the number of "DATA"
errors of the coaxial bus for the coaxial bus.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00BF
(191)
DPLL error on the forward
loop side/coaxial bus
DPLL error
Accumulates and stores the number of "DPLL" errors on the
forward loop side for the optical loop, or the number of "DPLL"
errors of the coaxial bus for the coaxial bus.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00C0
(192)
UNDER on the reverse
loop side
Accumulates and stores the number of "UNDER" errors on the
reverse loop side.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00C1
(193)
CRC on the reverse loop
side
Accumulates and stores the number of "CRC" errors on the
reverse loop side.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00C2
(194)
OVER on the reverse
loop side
Accumulates and stores the number of "OVER" errors on the
reverse loop side.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00C3
(195)
Short frame on the
reverse loop side
Accumulates and stores the number of "Short frame" errors on
the reverse loop side.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00C4
(196)
Abort on the reverse loop
side (AB, IF)
Accumulates and stores the number of "AB.IF" errors on the
reverse loop side.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00C5
(197)
Timeout on the reverse
loop side (TIME)
Accumulates and stores the number of "TIME" errors on the
reverse loop side.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00C6
(198)
Receiving 2k bytes or
more on reverse loop side
(DATA)
Accumulates and stores the number of "DATA" errors on the
reverse loop side.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3
SW00C7
(199)
DPLL error on reverse
loop side
Accumulates and stores the number of "DPLL" errors on the
reverse loop side.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
3: To reset from the SW00B8 to C7, turn on the SB0006.
The numbers of times stored in the SW00B8 to SW00C7 will not cause any problems if they are counting up gradually over a long period of time. If they are
counted up rapidly in a short period of time (while monitoring with GX Developer, etc.), the cable may be faulty.