448
Remote I/O Communications Characteristics Section 8-1
CS, CJ, C200HX/HG/HE (-Z), and C200HS PLCs
Minimum I/O Response
Time
The minimum I/O response time occurs when the DeviceNet Slave I/O
refreshing is executed just after the input signal is received by the Master and
I/O is refreshed for the Slave first in the next I/O refresh cycle.
T
IN
: The Input Slave's ON (OFF) delay (Minimum value: 0)
T
OUT
: The Output Slave's ON (OFF) delay (Minimum value: 0)
T
RT-IN
: The Input Slave's communications time/Slave (Refer to page 450.)
T
RT-OUT
: The Output Slave's communications time/Slave (Refer to
page 450.)
T
PLC
: The PLC's cycle time
T
RF
: The PLC's DeviceNet Unit refresh time (Refer to page 451.)
Note Refer to SECTION 5 General-purpose Slaves and SECTION 6 Environment-
resistive Slaves for details on Input and Output Slaves' ON and OFF delay
times. Refer to Refresh Time on page 451 and the Operation Manual for the
PLC being used for details on the PLC's cycle time.
The minimum I/O response time (T
MIN
) is the total of the following terms:
T
MIN
= T
IN
+ T
RT-IN
+ (T
PLC
− T
RF
) + T
RT-OUT
+ T
OUT
PLC
TOUTTIN (TPLC−TRF) TRT-OUTTRT-IN
TRF
TPLC
Master Unit
Input
Output
Instruction
execution
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