Lighthouse Worldwide Solutions REMOTE 5104V, Operating Manual

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248083293-1 Rev 7 5-1
5
Programming with
MODBUS Protocol
The REMOTE 5104V family of instruments can be programmed using
the MODBUS Protocol. The full protocol is detailed in “R5104V
MODBUS Register Map v1.44” on page A-1.
This chapter contains the information needed to program the basic
configuration for the instrument using the MODBUS protocol.
DIP Switches
During power-up and reset, the counter reads the DIP switches on the
back panel.
Note:
When changing
the DIP switch settings, the
instrument power must be
cycled on and off to save
the settings.
DIP Switches 7 and 8 must both be in the OFF position in order to use
the MODBUS protocol.
Protocol
Settings
The MODBUS Protocol is defined through an RS-485 interface with:
• Baud Rate: 19200
• Data Bits: 8
• Stop Bits: 1
• Parity: None
• Flow Control: None
Power On/
Auto Start
When powering up the instrument, it will begin sampling using the
default configuration:
• Location = 0
• Sample Time = 60 seconds
• Hold Time = 0 seconds
• Alarm Channel = Enabled
Note:
The automatic
starting of the sampling
accommodates systems
that do not send a START
command, but just polls
the instrument for its data.
To stop the sampling, send the command 10 or 12 to command register
40002.
Stopping the sampling will set the Device Status bit in Register 40003
to 0.