OPERATION MANUAL CompoBus/S

I/O Response Time Characteristics Section 2-5
2-5-1 Slaves Other Than Analog Terminals
Minimum I/O Response
Time
42
PLC cycle
Master Unit
processing
Communications
cycle
Slave
processing
Input
Output
The following timing chart shows the minimum I/O response time.
IN
TI/O TPLC
TM-in-min TM-out-min
TS(IN) TS(OUT)
Minimum I/O response time (T MIN)
OUT
The minimum I/O response time is the total of the following terms:
TMIN = IN + TS(IN) + TM-in-min + TI/O + TPLC + TM-out-min + TS(OUT) + OUT
TMIN : Minimum I/O response time
TPLC: PLC’s cycle time
IN: Input delay in the Slave (Refer to 2-5-3 Slave I/O Delay Times on
page 51.)
OUT: Output delay in the Slave (Refer to 2-5-3 Slave I/O Delay Times on
page 51.)
TS (IN) : Input data transmission time for one node.
High-speed Communications Mode: 20 µs
Long-distance Communications Mode: 160 µs
TM-in-min: Minimum input processing time in the Master
CS-series, C200HX/HG/HE-(Z)E, C200HS, or CQM1 Master Unit:
TM-in-min = 0 µs
CS-series Master Units:
TM-in-min =20 µs (allocated words for 1 unit number),
25 µs (allocated words for 2 unit numbers)
CJ-series Master Units:
TM-in-min = 25 µs
TM-out-min: Minimum output processing time in the Master
CS-series, C200HX/HG/HE-(Z)E, C200HS, of CQM1 Master Unit:
TM-out-min = 0 µs
CS-series Master Units:
TM-out-min = 33 µs (allocated words for 1 unit number),
43.5 µs (allocated words for 2 unit numbers)
CJ-series Master Unit:
TM-out-min = 45 µs
TS (OUT) : Output data transmission time for one node.
High-speed Communications Mode: 15 µs