Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 468

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 449.)
T : The PLC's cycle time (instruction execution + peripheral servicing)
PLC0
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 instruction execution and peripheral
servicing cycle times.
The maximum I/O response time (T
T = T + 2 × T
MAX IN
Periph-
Periph- Instruction
eral ser- eral ser-
execution
vicing
vicing
T
PLC0
) is the total of the following terms:
MAX
+ 3 × T + T
RM PLC0 OUT
Section 8-1
Instruction Periph- Instruction
eral ser-
execution execution
vicing
T T T
PLC0 RM OUT
447