Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 467

Remote I/O Communications Characteristics
CVM1- and CV-series PLCs (Synchronous Mode)
Minimum I/O Response
Time
446
The minimum I/O response time occurs with the I/O timing shown in the fol-
lowing diagram.
PLC
Master Unit
Input
Output
T
T : The Input Slave's ON (OFF) delay (Minimum value: 0)
IN
T : The Output Slave's ON (OFF) delay (Minimum value: 0)
OUT
T : The Input Slave's communications time/Slave (Refer to page 450.)
RT-IN
T : The Output Slave's communications time/Slave (Refer to
RT-OUT
page 450.)
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 cycle time.
The minimum I/O response time (T
T = T + T
MIN IN RT-IN
Cycle time
Instruction
Periph-
Periph-
eral ser- eral ser-
execution
vicing vicing
T +T
IN RT-IN PLC0
) is the total of the following terms:
MIN
+ 2 × T + T
PLC0 RT-OUT
Section 8-1
Instruction Periph- Instruction
eral ser-
execution
execution
vicing
T T T
PLC0 RT-OUT OUT
+ T
OUT