Omron EJ1 - 07-2008, Operation Manual

Page: 149 / 198

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Remote I/O Communications Characteristics Section 7-1
CS, CJ, C200HX/HG/HE (-Z), and C200HS PLCs
Minimum I/O Response
Time The minimum I/O response time occurs when the DeviceNet Slave I/O
refreshing is executed just after the input signal is received by the master and
I/O is refreshed for the slave first in the next I/O refresh cycle.
T
IN
: The Input Slave's ON (OFF) delay (Minimum value: 0)
T
OUT
: The Output Slave's ON (OFF) delay (Minimum value: 0)
T
RT-IN
: The Input Slave's communications time/slave
T
RT-OUT
: The Output Slave's communications time/slave
T
PLC
: The PLC's cycle time
T
RF
: The PLC's DeviceNet Unit refresh 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 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
PLC
−
T
RF
) + T
RT-OUT
+ T
OUT
PLC
T
OUT
T
IN
(T
PLC
− T
RF
) T
RT-OUT
T
RT-IN
T
RF
T
PLC
Master Unit
Input
Output
Instruction
execution