Communication With Devices By Scada Or Monitoring System - ABB VSN700 Product Manual

VSN700 Data Logger Product Manual
Configure Global Settings menu. The following image shows an example where one interface is
configured for Modbus RTU and the other interface for Power-One SunSpec Adapter.
Save the changes by pressing the blue floppy disk icon.
The logger needs to be rebooted for the configuration changes to take effect. In the Home tab click
on the Reboot Logger button and wait about a minute for the logger to fully reboot.
Now that the data logger has been configured, devices can be added to the logger either manually
or using the Find button(s) as previously described in this manual.

Communication with devices by SCADA or monitoring system

The external monitoring or SCADA system communicates with the serial devices through the data
logger's Modbus TCP server/gateway. The data logger's Eth0 interface and the external system
need to be on the same network subnet or have a route set up in order to communicate. The
Modbus TCP ports must also be opened as described previously. The data logger forwards
Modbus TCP traffic on port 502 to the Primary RS-485 interface and traffic on port 503 to the
Secondary RS-485 interface. For example, to communicate with a legacy Power-One inverter at
RS-485 address 14 connected to the Primary RS-485 port which has been configured for Power-
One SunSpec Adapter, the Modbus TCP command would be pointed to:
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