Omron DRT2 Series Operation Manual page 210

Remote I/O Communications Characteristics
Maximum I/O Response
Time
PLC cycle (instruction
execution cycle)
PLC cycle (peripheral
servicing cycle)
Master Unit processing
Input
Output
T
IN
T : The Output Slave's communications time/Slave (Refer to
RT-OUT
page 198.)
T : The PLC's peripheral servicing cycle time
PLC2
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 199 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
T = T + T
MIN IN RT-IN
The maximum I/O response time occurs with the I/O timing shown in the fol-
lowing diagram.
Instruction execution
cycle time
Instruction
execution
T T
RM PLC2
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 page 199.)
RM
T : The PLC's instruction execution cycle time
PLC1
T : The PLC's peripheral servicing cycle time
PLC2
Note Refer to SECTION 4 Functions, SECTION 5 General-purpose Slaves and
SECTION 6 Environment-resistive Slavess for details on Input and Output
Slaves' ON and OFF delay times. Refer to Refresh Time on page 199 and
the Operation Manual for the PLC being used for details on the PLC's instruc-
tion execution and peripheral servicing cycle times.
The maximum I/O response time (T
T = T + 2 × T
MAX IN
) is the total of the following terms:
MIN
+ T + T + T
PLC2 RT-OUT OUT
Instruction
execution
Peripheral
servicing
cycle time
T T
PLC1 PLC2
) is the total of the following terms:
MAX
+ T + 2 × T
RM PLC1 PLC2
Section 8-1
T T
RM OUT
+ T
OUT
193