Omron CJ Series Operation Manual page 210

5 Remote I/O Communications
• TCrmInMax: Maximum input processing time at Master Unit
Communications
mode
Communications mode 3
Communications mode 8
*1 Communications Mode 8
M = (Number of Word Input Slave Units x 0.625 µs) + [{(Number of Bit Input Slave Units × 7) ÷ 8} × 0.375
µs] + [(Number of Word Output Slave Units or Word Input Slave Units, whichever is greater + Number of
Bit Output Slave Units and Bit Input Slave Units, whichever is greater) × 0.5 µs]
M Calculation Example
Conditions
Baud rate
---
M = (16 × 0.625 µs) + (1 × 0.375 µs) + {(16 + 16) × 0.5 µs} ≅ 0.027 ms
Reference Example
The following table shows the calculation results for the maximum I/O response time for Bit Slave
Units with the maximum number of nodes and a CPU Unit task period of 1 ms.
Communica-
tions mode
Communica-
tions mode 3
Communica-
tions mode 8
5-58
Baud rate
4.0 Mbps
0.35 ms
0.25 ms + M (
*1
Word outputs
8 nodes
Number of nodes con-
nected
32 word nodes (16 input, 16
output)
128 bit nodes (64 bit input,
64 bit output)
128 word nodes (64 input,
64 output)
256 bit nodes (128 bit input,
128 bit output)
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
3.0 Mbps
0.35 ms 0.39 ms
) 0.27 ms + M ( ) 0.33 ms + M (
*1
Word inputs Bit outputs
16 nodes 16 nodes
Bit Slave Unit max. I/O response time (ms)
4 Mbps 3 Mbps
11.0 12.4
18.2 21.5
(With message communications)
1.5 Mbps 93.75 kbps
0.39 ms
) 0.35 ms + M (
*1
Bit inputs
8 nodes
1.5 Mbps 93.75 kbps
20.9 194.6
40.6 442.6
)
*1