LSIS XGL-C22A, User Manual, Page: 57 / 299

Chapter 6 Communication Parameter
6-5
(1) Communication type
Check the Cnet I/F module and set the parameter about each channel accurately. If communication type set
by parameter is different with channel type of real communication module, normal communication is
impossible because CPU recognizes the channel type of real communication module.
(a) Parity bit
The Cnet I/F module defines three parity bit. Each parity bit has the following meaning like [Table 6.2.2].
Parity Meaning reference
None Not use parity bit
Even If the number of 1 is even in the one byte, it sends 0 at the parity bit.
Odd If the number of 1 is odd in the one byte, it sends 0 at the parity bit.
[Table 6.2.2] Parity content
(b) Dedicated service driver
The user can select the operation mode about each channel of Cnet I/F module by using the driver selection
item.
Each channel of Cnet I/F module operates as server or client, each channel operates independently.
Type and meaning of operation mode for each channel is as following [Table 6.2.3].
Driver type Meaning Reference
P2P
Relevant port acts as client and it communicates by P2P
parameter setting. Refer to P2P
setting
XGT server
Supports the XGT dedicated communication and acts as
XGT server.
For dedicated
service
Modbus ASCII server Acts as modbus ASCII server
Modus RTU server Acts as modbus RTU server
[Table 6.2.3] Driver type and meaning
If operation mode of Cnet channel is XGT server or modbus, it supports the loader service with the dedicated
service.
1) XGT server
Supports reading/writing memory of the dedicated service
2) Modbus ASCII/RTU server
a) This is used when network is configured with modbus protocol and Cnet I/F module acts as server.
b) Since modbus memory area is different with XGT memory area, memory mapping is necessary.
c) For memory mapping, refer to the “Chapter 7.1”