PCP message transmission time
(Original Document)
About us
Introduction
Message transmission time is the time between the sending of the messages and the receiving of the report.
Graph 2
The following figure presents the graph of the number of cycles G m in an INTERBUS message
Calculation example
The example shows a write request transmission of 39 bytes. Upon receiving the message, the report size is 4 bytes.
The table lists the different elements used in the transmission time calculation
Number of PCP words (Bandwidth)
1
2
4
IBS scanning time (in ms, read from Graph 1)
3
3
3
Sending of the 39 byte write request
Number of cycles Gm (read from Graph 2)
39
13
6
TD1 = Gm *scanning time +10 (in ms)
127
49
28
Receiving the 4 byte report
Number of cycles Gm (read from Graph 2)
4
2
1
TD2 = Gm *scanning time +10 (in ms)
22
16
13
Request transmission time
= TD1 + TD2 (in ms)
149
65
41