User Defined Communication; Introduction - LG GLOFA-GM Series User Manual

Chapter 7 Communication function
Chapter 7 Communication function

7.1 User defined communication

7.1.1 Introduction

User defined communication is the mode with which user can define other company's protocols in GLOFA PLC for
communication between Cnet I/F module and other company's devices. Since lots of different communication
protocols produced by various makers of communication devices are used, all the different protocols can't be built in
communication module. Thus, user is to define protocol and to configure program in accordance with its application
field in order to communicate with other company's devices on the basis of the defined protocol in Cnet I/F module.
Such a tool to define protocol frame shall be used for this as Frame Editor provided along with Cnet I/F module to
compose and edit other company's protocol. For user defined mode, exact contents of protocol to use shall be known
to communicate exact data. User-defined protocol frame can be downloaded or uploaded via Frame Editor to Cnet I/F
module and the saved contents are kept indelibly inside Cnet I/F module for use even though powered off. In addition
to frame edit, programming by Function Block which controls transmission/receiving in PLC shall be performed for
user defined mode service. This chapter describes the communication specification of user defined mode and the
way to use. As Gm7 Cnet series is different from the other Cnet I/F modules in its application, please read the
user definition in 7.1.5 G7L-CUEC carefully.
[Table 7.1] Operation mode of Cnet I/F module that is operated in user defined mode
Module name
switch
G3L-CUEA
G4L-CUEA
G6L-CUEB
G6L-CUEC
G7L-CUEB
G7L-CUEC
Remark
[Note 1] In interlocking mode, RS-232C and RS-422 channels are operated via identical protocol.
[Note 2] In stand-alone mode, RS-232C and RS-422 channels are operated via different protocols respectively.
Mode
RS-232C
0
User defined communication
2
User defined communication
4
User defined communication
5
Dedicated communication
6
GMWIN
9
0
User defined communication
9
N/A
User defined communication
Operation mode
RS-422
User defined communication
User defined communication
Dedicated communication
User defined communication
User defined communication
On-line mode Ver. 2.0
On-line mode Ver. 2.0
7-1
Remark
Interlocking mode
[Note 1]
Stand-alone mode
[Note 2]
Set by Frame Editor
Set by Frame Editor
Set by GMWIN