Hitachi IR.LINK User Manual page 79

Option for s10mini and s10v
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5 USER GUIDE
When the analog input/output is set to the synchronous mode at communication
The formula for communication time per station is outlined as follows:
• At 1 Mbps: 1.4 + (DS×0.06) + (DN×0.070) + (AS×0.23) + (AN×0.013) [ms]
• At 0.5 Mbps: 1.7 + (DS×0.06) + (DN×0.077) + (AS×0.23) + (AN×0.024) [ms]
DS: Number of slots in which the DI/DO modules are installed.
DN: Total I/O size of the DI/DO module (Number of bytes)
AS: Number of slots in which the AI/AO modules are installed.
AN: Total I/O size of the AI/AO module (Number of bytes)
For example, when 16-point DI (2 bytes) × 1, 16-point DO (2 bytes) × 1, 4-channel AI (8
bytes) × 2, and 4-channel AO (8 bytes) × 1 are installed and communication is made at 1
Mbps as shown in the following figure, the communication time is as follows:
Communication time (analog asynchronous mode) =
1.4 + (2×0.06) + (4×0.070) + (3×0.23) + (24×0.013) = 2.802 [ms]
Set a larger value than the total communication time of all IR.Stations as the refresh cycle.
DI
Power
IR.Station
supply
DO
AI
AI
AO
5-12

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