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Message Delay Times Section 8-4
Note This communications cycle time is calculated assuming that there is no node
that transmits event frames before the SEND command is executed.
Link Unit servicing (source node) × 2 PLC cycle time (source node) × 2
Transmission processing (command) 3 ms
Communications cycle time × 2 (See note.) (600 × 4 + 110 × 32 + 320 × 0 + 4 ×
0 + 2,290) × 2 = 8,210 µs × 2 ≅
16.4 ms
Transmission delay (command) 0.112 ≅ 0.1 ms
Reception processing (command) 2.3 ms
Link Unit servicing (destination node) PLC cycle time (destination node)
Transmission processing (response) 0.00125 × 256 + 3 = 3.32 ≅ 3.3
Transmission delay (response) 0.008 × 256 + 0.112 = 2.16 ≅ 2.2
Reception processing (response) 0.00125 × 256 + 2.3 = 2.62 ≅ 2.6
Total (max. transmission delay) PLC cycle time (source node) ×
2 + PLC cycle time (destination
node) + Peripheral servicing
time (destination node) +
29.9 ms