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