Vaisala Optimus OPT100 - Modbus Protocol; DNP3 Protocol; Table 7 Modbus TCP Communication Settings; Table 8 Default Modbus RTU Communication Settings

More information
‣
Muting gas level alerts (page 54)
2.12 Modbus protocol
Data measured by DGA monitor can be read using Modbus protocol. Supported Modbus
variants are:
• Modbus TCP over the Ethernet interface
• Modbus RTU (serial Modbus) over the RS-485 interface
Table 7 Modbus TCP communication settings
Property Specification
IP address of Modbus server IP address of DGA monitor on interface ETH0
Modbus server port 502
Table 8 Default Modbus RTU communication settings
Property Specification
Baud rate 19200
Parity Even
Data bits 8
Stop bits 1
Modbus RTU slave address 240
More information
‣
Modbus registers (page 105)
2.13
DNP3 protocol
DNP3 protocol is an optional feature and requires a license. If a license is not
installed on the DGA monitor, you cannot enable the protocol. Contact Vaisala for
acquiring the license.
OPT100 DGA monitor provides the following functionality over DNP3 (Distributed Network
Protocol):
• Latest measured values of measurement parameters and latest calculated rate of change
(ROC) and gas ratio values are available as analog input points.
• Gas level alerts are available as binary input points.
Chapter 2 – Product overview
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