Mitsubishi Electric MELSEC Q Series Reference Manual page 371

APPENDICES
No. Name
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)
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 - 29
Table 3 Link special register (SW) list (Continued)
Description
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
Turning ON Clear retry count (SB0005) clears the stored value.
Accumulates and stores the number of retries on the reverse
loop side.
Other than 0: Number of errors
Turning ON Clear retry count (SB0005) clears the stored value.
Accumulates and stores the number of detected line errors on
the forward loop side.
Other than 0: Number of detected line errors
Turning ON Clear forward loop transmission errors (SB0007)
clears the stored value.
Accumulates and stores the number of detected line errors on
the reverse loop side.
Other than 0: Number of detected line errors
Turning ON Clear reverse loop transmission errors (SB0008)
clears the stored value.
Accumulates and stores the number of loop checks conducted.
Other than 0: Number of loop switches
Turning ON Clear loop switch count (SB0009) clears the stored
value.
Stores the pointer that indicates the next loop switch data.
0 to 15: Loop switch data (SW00D0 to SW00DF)
Turning ON Clear loop switch count (SB0009) clears the stored
value.
MELSEC-Q
Availability
Remote
Control Normal
master
station station
station
Optical Coaxial Optical Coaxial Optical Coaxial Optical Coaxial
Remote I/O
station
App - 29