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Remote I/O Communications Characteristics
Maximum I/O Response
Time
Master Unit
Input
Output
The maximum I/O response time occurs with the I/O timing shown in the fol-
lowing diagram.
Cycle time
Periph-
Instruction
eral ser-
PLC
execution
vicing
T
T
T
IN
RM+
PLC0
T
:
The Input Slave's ON (OFF) delay
IN
T
:
The Output Slave's ON (OFF) delay
OUT
T
:
The whole Network's communications cycle time (Refer to
RM
page 115)
T
:
The PLC's cycle time (instruction execution + peripheral servicing)
PLC0
Note Refer to the information on each slave for details on Input and Output Slaves'
ON and OFF delay times. Refer to 7-1-2 CompoWay/F Communications
Cycle Time and Refresh Time and the Operation Manual for the PLC being
used for details on the PLC's instruction execution and peripheral servicing
cycle times.
The maximum I/O response time (T
T
= T
+ 2 × T
MAX
IN
Periph-
Instruction
Periph-
eral ser-
eral ser-
execution
vicing
vicing
T
PLC0
) is the total of the following terms:
MAX
+ 3 × T
+ T
RM
PLC0
OUT
Section 7-1
Periph-
Instruction
Instruction
eral ser-
execution
execution
vicing
T
T
T
PLC0
RM
OUT
113
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