LG GLOFA-GM Series User Manual page 262

Chapter 8 Exercising program
Setting item
Operation
mode
Station No.
Communi-
cation speed
Data/Stop
Remark
[Note1] If module Ver.2.0 is used, set RS-232C channel to dedicated mode for dedicated master mode service
so to simplify programming. Refer to 7.3 Dedicated communication master in the manual for
programming procedure.
[Table 8.4] describes setting items of the module. Communication method and specification shall be set identical
also for monitoring device and optical modem. Refer to user's manual of the applied product for setting of optical
modem and monitoring device.
3) Programming
GMWIN program shall be prepared for user defined communication via RS-232C channel of Cnet stations 1,2,3
in system of [Figure 8.4], and frame for communication via dedicated communication protocol shall be also
prepared in Frame Editor. RS-422 channel of Cnet 1,2,3 stations needs no additional communication
programming because the monitoring device operates as a master station. Cnet station 4 needs no
communication programming either because it operates as a dedicated mode slave. Data memory mapping is all
identical for communication of Cnet 1,2,3 stations, thus, the same program may be shared in those 3 stations.
Next is how to prepare the program in station 1.
A) Dedicated communication protocol to be used: Cnet station 1 shall prepare frame in user defined mode for
communication through dedicated communication protocol of Cnet station 4. Use continuous reading/writing
commands of direct variables in dedicated communication protocol to allow communication between station 1
and station 4 through TX/RX map between Cnet I/F modules in [Table 8.3]. Next is for protocol of dedicated
communication slave to communicate through the map in [Table 8.3]. Refer to 7.2 in this manual for details.
Cnet on fixed body
Dedicated communication
Set 1,2,3 stations in order
19200 BPS
Data-8/Start-1/Stop-1
8-11
Cnet on mobile body
Dedicated communication
Station 4
19200 BPS
Data-8/Start-1/Stop-1
Remark
Communication
parameters shall
be agreed with
monitoring
device.