Overall Performance; I/O Response Time - Omron C200HW-CORT21-V1 Operation Manual

Performance

2-3-3 Overall performance

2-3-3-1 I/O response time

Minimum vs. maximum
PLC
CORT21-V1
Bus
Input node
Output node
PLC
CORT21-V1
Bus
Input node
Output node
This section describes the performance of the C200HW-CORT21-V1 in
combination with the host PLC.
First, the I/O response time is described. This is the time between an input
being set (or reset) on an Input Node and an output being set (or reset) on an
Output Node, all under the condition that the Input Node and Output Node
are linked to the C200HW-CORT21-V1.
After that, the maximum transmission / reception rate of user defined CAN
messages is described.
The figures below show the minimum and maximum I/O response time. In
the bottom figure, the processing of received messages is finished just after
a PLC I/O refresh, and the received application data cannot be transferred to
the PLC until the next I/O refresh. The other factors that can influence the I/O
response time are for both cases identical and are explained below.
t t t t
IN MD UPR RF
minimum I/O response time
t t t
IN MD UPR
t : Input Node ON (OFF) delay
IN
t : Output Node ON (OFF) delay
OUT
t : Message Delay time
MD
t t
PE RF
t t t
PE RF
maximum I/O response time
t : Unit Processing time for Received messages
UPR
t : Unit Processing time for Transmitted messages
UPT
t : Program Execution time
PE
t : I/O Refresh time
RF
t t t
UPT MD OUT
t t t
PE RF UPT MD
Section 2-3
t
OUT
27