KONICS krn100, User Manual, Page: 91 / 155

8
Parameter detail setup
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During communication, if you chaging the communication settings, it may cause communication
error.
RS485 communication port of KRN100 is connected for 3 A, B, SG terminals.
SG terminal is connectable with shield or SG of converter, and you do not need to connect SG
terminal.
To remove noise during RS485 communication, use shield cable. There are three methods for
shield processing.
1
Connects shield cable only for
SG terminal of communication
module.
When electric potential occurs between computer and
recorder grounded, connect shield cable for SG terminal of
recorder to minimize noise effect not to flow current on
shield cable. (It is used generally.)
2
Connects shield for both SG
terminal of communication
module and the grounding of
computer.
When electric optional does not occur between computer
and recorder grounded, it is effective to minimize noise
influence.
3
Connects shield for one of SG
terminal of communication
module or the grounding of
computer.
It can minimize noise effect in case of connecting non-
polarity condenser in series.
It is recommended to use SCM-US 48
I
(USB/RS485 converter) or SCM-38
I
(RS232C/RS485
converter) for RS485 communication between PC and KRN100.
If using the non-grounded converter between FG and SG, it may cause damage to KRN100 and
communication error by electric potential of between ground during long-distance communication.
For using terminating resistance, turn ON only terminal resistance of recoder on end of
connected communication line (Enables to set using terminating resistance in communication set
function), and also turn ON terminal resistance of connected communication to PC.