C200Hx/Hg/He And Cqm1H-Series Plcs - Omron SYSMAC CS1W-RPT01 Operation Manual

Message Delay Times
8-4-2

C200HX/HG/HE and CQM1H-series PLCs

SEND(90)
SEND(90)
executed
268
Link Unit servicing (source node) × 2
Link service processing (source node) × 2
Transmission processing (command)
Communications cycle × 2 (See note.)
Transmission delay (command)
Reception processing (command)
Link servicing interval (destination node)
Link service processing (destination node)
Transmission processing (response)
Transmission delay (response)
Reception processing (response)
Total (max. transmission delay)
Note This communications cycle time is calculated assuming that there is no node
that transmits event frames before the RECV command is sent.
The following diagram indicates the data flow which will yield the maximum
delay time from the time SEND(90) is executed by the user program to the
time the Controller Link Unit stores the data in the destination Unit's memory.
Transmission processing
Link Unit servicing (destination
node)
Max. transmission delay
Max. transmission delay = Link Unit servicing interval (source node) + Trans-
mission processing + Communications cycle time + Transmission delay +
Reception processing + Link Unit servicing interval (destination node).
PLC cycle time (source node) × 2
1 ms × 2 = 2 ms
2 ms
(600 × 4 + 110 × 32 + 320 × 0 + 4 ×
0 + 2,290) × 2 = 8,210 µs × 2 ≅
16.4 ms
0.112 ≅ 0.1 ms
1.3 ms
As required by Programming
Device (destination node)
1 ms
0.00075 × 256 + 2 = 2.192 ≅
2.2 ms
0.008 × 256 + 0.112 = 2.16 ≅
2.2 ms
0.00075 × 256 + 2 = 2.192 ≅
2.2 ms
PLC cycle time (source node) ×
2 + Peripheral servicing time
(destination node) + 29.4 ms
Link Unit servicing
(source node)
Communications cycle
Transmission delay
Reception processing
Data stored
Section 8-4