Omron EJ1 - 07-2008, Operation Manual

Page: 146 / 198

127
Remote I/O Communications Characteristics Section 7-1
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 peripheral servicing 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
PLC2
+ T
RT-OUT
+ T
OUT
Maximum I/O Response
Time The maximum I/O response time occurs with the I/O timing shown in the fol-
lowing diagram.
T
IN
: The Input Slave's ON (OFF) delay
T
OUT
: The Output Slave's ON (OFF) delay
T
RM
: The whole Network's communications cycle time (Refer to page 131.)
T
PLC1
: The PLC's instruction execution cycle time
T
PLC2
: The PLC's peripheral servicing cycle time
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 peripheral servicing cycle time.
The maximum I/O response time (T
MAX
) is the total of the following terms:
T
MAX
= T
IN
+ 2 × T
RM
+ T
PLC1
+ 2 × T
PLC2
+ T
OUT
T
PLC2
T
RM
T
OUT
T
IN
T
RM
T
PLC1
T
PLC2
Instruction execution
cycle time
PLC cycle (instruction
execution cycle)
PLC cycle (peripheral
servicing cycle)
Master Unit processing
Input
Output
Peripheral
servicing
cycle time
Instruction
execution
Instruction
execution