Omron CS1W-DRM21, Operation Manual

Page: 318 / 379

301
Remote I/O Communications Characteristics Section 7-1
T
RT-OUT
: Output Slave’s communications time/Slave (See page 306.)
T
PLC2
: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
Note 1. Refer to SECTION 4 General-purpose Slaves, SECTION 5 Environment-
resistive and Waterproof Slaves,
and
SECTION 6 Special I/O Slave Units
Specifications for details on Input and Output Slaves’ delay times.
2. Refer to Refresh Time on page 307 and the PLC’s Operation Manual for
details on the PLC’s peripheral servicing cycle time.
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
: Master Unit’s communications cycle time (See page 305.)
T
PLC1
: The PLC’s instruction execution cycle time
T
PLC2
: 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
Note 1. Refer to SECTION 4 General-purpose Slaves, SECTION 5 Environment-
resistive and Waterproof Slaves, and SECTION 6 Special I/O Slave Units
Specifications
for details on Input and Output Slaves’ delay times.
2. Refer to Refresh Time on page 307 and the PLC’s Operation Manual for
details on the PLC’s peripheral servicing cycle time. (Look under Asyn-
chronous Operation.)
PLC cycle
(instruction execution cycle)
Master Unit processing
Input
Output
PLC cycle
(peripheral servicing cycle)
Instruction
execution
Instruction execution
cycle time
Peripheral
servicing
cycle time
Instruction execution
T
PLC2
T
PLC1
T
PLC2
Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: CustomerService@valin.com