Chapter 6 Server function and P2P service
6-4
Since address of Modbus 1~9999 (decimal number), size of bit IO area is 9999/8=1249.875 byte
(Namely 1249, byte should be integer unit).
Also size of word IO area is 9999*2=19998 byte.
In case the user set 0 as base address of bit output (0XXXX) area, Modbus bit area 00001
corresponds 0
th
byte 0
th
bit, 00002 corresponds 0
th
byte first bit.
6.2 P2P Service
6.2.1 General
P2P service means acting client operation of communication module. P2P instructions available at
Cnet I/F module are 4 (Read/Write/Send/Receive).
Registration and edit of P2P service is executed in XG-PD, each P2P parameter consists of max.
32 P2P block.
The following figure is example of P2P parameter setting window of XG-PD.
[Figure 6.2.1] P2P parameter setting example
Note
[N1] P2P 01 is fixed allocated at built-in communication, P2P 02 for first communication
module, P2P 03 for second communication. So slot number should be correct.
P2P parameter registration window
Diverse P2P parameter setting about one Cnet I/F module is available.
Each P2P parameter consists of P2P channel, P2P block, user frame definition.
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