Mitsubishi Electric QJ71LP21 Reference Manual page 327

APPENDIX
No. Name
3 DPLL error on the forward
SW00BF loop side/coaxial bus
(191) DPLL error
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
DPLL error on reverse
SW00C7
loop side
(199)
4 Number of retries on the
SW00C8 forward loop side/ coaxial
(200) bus retries error
4
Number of retries on the
SW00C9
reverse loop side
(201)
5
Line error on the forward
SW00CC
loop side
(204)
6
Line error on the reverse
SW00CD
loop side
(205)
7
SW00CE Number of loop switches
(206)
7
SW00CF Loop switch data pointer
(207)
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.
4: This may be counted up at power on/reset, but it is not an error.
Clear with the SB0005 when the number of retries is not required before starting data linking.
5: To reset the SW00CC, turn on the SB0007.
6: To reset the SW00CD, turn on the SB0008.
7: To reset the SW00CE to SW00E7, turn on the SB0009.
App - 23
Table 2 Link special register (SW) list (Continued)
Description
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
Accumulates and stores the number of "UNDER" errors on the
reverse loop side.
Other than 0: Number of errors
Accumulates and stores the number of "CRC" errors on the
reverse loop side.
Other than 0: Number of errors
Accumulates and stores the number of "OVER" errors on the
reverse loop side.
Other than 0: Number of errors
Accumulates and stores the number of "Short frame" errors on
the reverse loop side.
Other than 0: Number of errors
Accumulates and stores the number of "AB.IF" errors on the
reverse loop side.
Other than 0: Number of errors
Accumulates and stores the number of "TIME" errors on the
reverse loop side.
Other than 0: Number of errors
Accumulates and stores the number of "DATA" errors on the
reverse loop side.
Other than 0: Number of errors
Accumulates and stores the number of "DPLL" errors on the
reverse loop side.
Other than 0: Number of errors
Accumulates and stores the number of retries on the forward
loop side for the optical loop, or the number of retries of the
coaxial bus for the coaxial bus.
Other than 0: Number of errors
Accumulates and stores the number of retries on the reverse
loop side.
Other than 0: Number of errors
Accumulates and stores the number of detected line errors on
the forward loop side.
Other than 0: Number of detected line errors
Accumulates and stores the number of detected line errors on
the reverse loop side.
Other than 0: Number of detected line errors
Accumulates and stores the number of loop checks conducted.
Other than 0: Number of loop switches
Stores the pointer that indicates the next loop switch data.
MELSEC-Q
Use permitted/prohibited
Remote
Control Normal
master
station station
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
Remote I/O
station
App - 23