Hitachi FL.NET User Manual page 167

5 USER GUIDE
Token hold time (ms): Token holding time of the self-node
Token hold time = 1.1 + 0.001 × S + 0.001 × R + (MFT + 0.2) × F + MFT
Refresh cycle time (ms): Sum of the token hold time values of all the nodes.
Refresh cycle time = 1.1 × n + 0.002 × W + (MFT + 0.2) × (F1 + F2 + F3 ...... + Fn) + MFT × n
Cyclic transfer throughput (ms)
Time from setting data in the memory of the transmitting side CPU till calculating by using
calculation by the ladder program of the receiving side CPU.
Cyclic transfer throughput = RCT + SCT ...................................... [For ladder processing]
Cyclic transfer throughput = RCT .................................................. [For C mode processing]
Word block read throughput (ms)
Time from starting the operational function for word block reading till transmitting to
transmission of ACK to the opposite part from the self-node.
Word block read throughput = 8 + 3RCT + Token holding time
Transparent message (ms)
Message creating time (ms) = 0.02 + (0.0007 × MS) ............. [When message creating time > MFT]
Message creating time (ms) = MFT ....................................... [When message creating time ≤ MFT]
Message transmit processing time (ms) = (0.00096 × MS)
Message receive processing time (ms) = (0.0013 × MR)
1:1 transmission request processing time = 1.272 + 2RCT + Token holding time of the self-node
1:N transmission request processing time = 0.742 + RCT + Message creating time + Message
= 9.1 + 0.001 × S + 0.001 × R + (MFT + 0.2) × F + MFT
+ Message creating time + Message transmit
processing time + Message receive processing time
= 3.992 + 2RCT + 1.1 + 0.001× S + 0.001 × R
+ (MFT + 0.2) × F + MFT + (0.00166 × MS)
+ (0.0013 × MR)
transmit processing time
= 0.762 + RCT + (0.00166 × MS)
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