MultiExact Gas Analyser
Appendix
APPENDIX
A4
CONFIGURING THE MODBUS PARAMETERS (OPTION)
If your analyser has the Modbus output (either RS485 or Ethernet), you must
configure the communications parameters to suit the requirements of the network to
which you have connected the analyser.
The cable connections are shown in Section 5.2.6.
☞
All screen shots show the default setting.
These values are supervisor password protected. Your network administrator will
advise you of the necessary parameters that will be required to be entered.
A4.1 RS485
1.
Select
➞
Settings
➞
Comms parameters.
2.
The first screen (see Figure A5)
requests the communication mode.
This can be RTU or ASCII.
3.
Press the
soft key to change
the value.
Figure A5 – Comms parameters
mode Screen
☞
Use 8 bits for RTU and 7 bits for ASCII.
4.
Use the
soft key to select the
next parameter:
5.
Node address, this can be anything
from 1 to 247. Use the
and
soft keys to select the correct
value.
Figure A6 – Comms parameters
node address screen
6.
Use the
and
soft keys
to select the next parameter:
7.
Baud Rate, this can be anything
2400, 4800, 9600, 19200 or 38400.
Use the
and
soft keys
to select the correct value.
Figure A7 – Comms parameters
baud rate screen
05410001A / Revision 6
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