Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 472

APPENDICES
No. Name
3
Timeout on the forward
SW00BD
loop side (TIME)
(189)
3 Receiving 2k bytes or
SW00BE more on forward loop side
(190) (DATA)
3
DPLL error on the forward
SW00BF
loop side
(191)
3
UNDER on the reverse
SW00C0
loop side
(192)
3
CRC on the reverse loop
SW00C1
side
(193)
3
OVER on the reverse
SW00C2
loop side
(194)
3
Short frame on the
SW00C3
reverse loop side
(195)
3
Abort on the reverse loop
SW00C4
side (AB, IF)
(196)
3
Timeout on the reverse
SW00C5
loop side (TIME)
(197)
3 Receiving 2k bytes or
SW00C6 more on reverse loop side
(198) (DATA)
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.
App - 33
Table 4 Link special register (SW) list (continued)
Description
Optical loop: Stores the number of "TIME" errors on the forward
loop side.
Coaxial/twisted bus: Stores the number of "TIME" errors.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
Optical loop: Stores the number of "DATA" errors on the forward
loop side.
Coaxial/twisted bus: Stores the number of "DATA" errors.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
Optical loop: Stores the number of "DPLL" errors on the forward
loop side.
Coaxial/twisted bus: Stores the number of "DPLL" errors.
Other than 0: Number of errors
Turning ON Clear communication error count (SB0006) clears
the stored value.
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.
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.
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.
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.
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.
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.
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.
Use permitted/prohibited
Control Normal
station station
Loop Bus Loop Bus
[Availability column] Loop: optical loop, Bus: coaxial/twisted bus
MELSEC-Q
Remote
Remote I/O
master
station
station
Loop Bus Loop Bus
: Available, : Not available
App - 33