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248083447-1 Rev 1
A-1
A
Apex
Remote
MODBUS Register
Map v1.50
COMM
Settings
Lighthouse particle counters with MODBUS use the following
communications settings:
Note:
Apex
Remote
currently supports only
upper case.
The MODBUS slave address is set on the particle counter.
Supported
MODBUS
Commands
Visit www.modbus.org for documentation on how to use these
commands.
Table A-1 MODBUS Communications Settings
Baud Rate
19200
Data Bits
8
Stop Bits
1
Parity
None
Hardware Protocol
RS-232-C or RS-485 standard
Software Protocol
MODBUS ASCII (supports upper/lower case)
and MODBUS RTU
Table A-2 MODBUS Registers
Hex Command
Description
03
Read Holding Registers
04
Read Input Registers
06
Write Single Holding Register
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