Mitsubishi Electric MELSEC-Q Series User Manual page 205

Number
SB006A PORT1 linkup status (own station)
SB006C PORT1 error frame reception status (own station) SW0068
SB006E PORT1 error frame detection (own station)
(4) Detecting cable disconnections
Number
SB0047 Baton pass status (own station)
(5) Checking communication error and network event history
Number
SB0006 Clear communication error count
SB0009 Event count clear
SB007A Event history status
(b) Checking the line status (own station)
1) If there is a line error in the own station, one of SB006A, SB006C, and
SB006E will turn on.
2) The line status can be checked using SW0064, SW0068, and SW0069.
Description
Cable disconnection is detected using the CC-Link IE Field Network diagnostics as well
as link special relays (SBs) and link special registers (SWs). (Refer to Chapter 9.)
1) If a cable is disconnected, a baton pass error causes Baton pass status (own
station) (SB0047) to turn on.
2) 30H is stored in Cause of baton pass interruption (SW0048).
Details on the causes of error can be checked using link special relays (SBs) and
link special registers (SWs) corresponding to the station number where the error
has occurred.
Description
Communication errors and network events are detected using the CC-Link IE Field
Network diagnostics as well as link special relays (SBs) and link special registers (SWs).
(Refer to Chapter 9.)
1) The number of communication errors is stored in SW0074 to SW0077. The
number can be cleared by Clear communication error count (SB0006).
2) When network event history occurs, Event history status (SB007A) is turned
on. Number of network event history items is stored in Event history
cumulative count (SW007A). The number can be cleared by Event history
count clear (SB0009).
Description
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Number
SW0064 Connection status (own station)
PORT1 line error occurrence rate (max.)
SW0069 PORT1 line error occurrence rate (present)
Number
SW0048 Cause of baton pass interruption
Number
SW0074 PORT1 cable disconnection detection count
SW0075 PORT1 receive error detection count
SW0076 PORT1 total no. of received data (lower 1 word)
SW0077 PORT1 total no. of received data (upper 1 word)
SW007A Event count
11 - 19
Chapter 11 PROGRAMMING
Description
Description
Description
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