Appendix 1 Definition of Terms
A-6
(13) BCC (Block Check Character)
As serial transmission may have signals distorted due to undesirable noise in transmission line, BCC
is used as data to help receiving side to check the signals if normal or distorted and to detect errors
in signals as compared with the received BCC after calculating BCC by receiving side itself using the
data input to the front terminal of BCC.
(14) XG5000 service
This is the function to remotely perform programming, reading/writing user’s program, debugging,
and monitoring, etc. without moving the physical connection of XG5000 in the network system where
PLC is connected to Cnet I/F module. Especially, it is convenient to control a remote PLC via modem.
* XG5000 : Programming software of XGT PLC for Windows
Relay station
Public
network line
Public
network line
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