11-12
Programming Example 2: Connecting to a PLC Section 1-6
BCD
Communications
1-6-4 Timing Chart
RUN
START
DU (START)
Upward differentiation of START signal
REQ-A
D.V.-A
DU (D.V.-A)
Upward differentiation of A DATA VALID signal
DD (D.V.-A)
Downward differentiation of A DATA VALID signal
REQ-B
D.V.-B
DU (D.V.-B)
Upward differentiation of B DATA VALID signal
DD (D.V.-B)
Downward differentiation of B DATA VALID signal
REQ-C
D.V.-C
DU (D.V.-C)
Upward differentiation of C DATA VALID signal
DD (D.V.-C)
Downward differentiation of C DATA VALID si
nal