DL8000 Preset Instruction Manual
B-22 Modbus Communications Revised February-2016
B.7 Modbus Master Modem
As a Modbus master, the DL8000 may have to communicate with
multiple slave devices through modems and phone lines. The Modbus
Master Modem screen provides the necessary parameters to configure
the modems and map RTU addresses to phone numbers.
Note: You can configure Modbus functionality only for
communications ports Comm 2 through Comm 5. The LOI and
Ethernet (Comm 1) ports do not support Modbus master
communications.
Each comm port can access to six RTU addresses. This point associates
Modbus slave RTU addresses to their respective phone numbers. Up to
six different Modbus slaves can be dialed through one communication
port. The DL8000 retries three times to establish a connection with a
slave.
B.7.1 Modbus Configuration Master Modem Tab
To access this screen:
1. Select Configure > MODBUS. The Modbus Configuration screen
displays.
2. Select the Master Table tab. The Master Modem screen displays.
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