4. FUNCTIONS
MELSEC-A
4-18
(4) PROFIBUS I/F module Ready signal (X1D)
This turns on when the AJ71PB96F/A1SJ71PB96F module preparation ends. When self
diagnostics is set this signal turns on when there is a self diagnostic normal end. Refer to the
following flowchart for information regarding the difference with the communication Ready signal
(X1B).
Differences between the X1B and X1D
NO
YES
NO
NO
YES
YES
X1D ON
X1B ON
Conduct self
diagnostic?
Self diagnostic program
Self diagnostic
OK?
Communi-
cation preparation
end?
Error processing
Communication preparation
(5) PROFIBUS I/F watchdog timer error signal (X0D)
This turns on when the AJ71PB96F/A1SJ71PB96F detects a watchdog timer error.
(6) Network trouble signal (X04)
This turns on when a value is set in the buffer memory network trouble information area. To turn
off the network trouble signal (X04), turn on the network trouble read out end signal (Y04).