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(6) Checking communication error and network event history
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). ( Page 206, CHAPTER 9)
1. The number of communication errors is stored in SW0074 to SW0077, and SW007C to SW007F.
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).
When Event count clear (SB0009) is accepted, Event history clear acceptance status (SB0061) turns on.
When the event count is cleared, Event history clear completion status (SB0062) turns on.
Number Description Number Description
SB0006 Clear communication error count
SB0009 Event count clear
SB0061 Event history clear acceptance status SW0074 PORT1 cable disconnection detection count
SB0062 Event history clear completion status 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)
SB007A Event history status SW007A Event count
SW007C PORT2 cable disconnection detection count
SW007D PORT2 receive error detection count
SW007E PORT2 total no. of received data (lower 1 word)
SW007F PORT2 total no. of received data (upper 1 word)
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