ION 8000 Series User Guide The Meter as Modbus Slave
Chapter 7 - Third Party Protocols Page 97
The Meter as Modbus Slave
Your meter can act as a Modbus Slave, using both the Modbus RTU and Modbus/
TCP protocols.
Using the Modbus RTU Protocol
The ION 8000 series meter can act as a Modbus Slave device, making any real-time
data available through the Modicon Modbus RTU protocol. Modbus Master
devices connected to the meter can access (read) this data or write data to your
meter’s ION registers, making device configuration changes and initiating control
actions.
The Factory Modbus Slave Configuration
The meter makes data available to Modbus Master devices using pre-configured
Modbus Slave modules. These modules are linked to other modules in the meter
that provide the energy, power and demand data. Once a communications channel
is configured to use Modbus RTU protocol, the data is available to Modbus Master
devices.
NOTE
Connect to IP Service Port 7701 for Modbus RTU communications over Ethernet. The Modbus Unit ID of
the meter over Ethernet is 100.
As the data available through the Modbus Slave modules is in a specific format,
knowledge of the Modbus protocol and an understanding of the settings used in
the meter are required to interpret the data provided.
ION meter
Modbus Slave
Module
Power Meter
Module
Measured data is
linked to the Modbus
module’s input.
Modbus Slave module
outputs data in Modbus
format
Data is available
to Modbus master
devices
Set the COM port
to the Modbus
RTU protocol
Vln a
40011
Communications Port
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