isoNAV685-D_D00215_02_M_XXEN/04.2017
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Device communication
11. Device communication
11.1 Ethernet interface
The Ethernet interface can be used for communication with Modbus, web server and
BCOM.
11.2 BCOM
BCOM is intended for communication between Bender devices via Ethernet.
All devices that communicate via BCOM must have the same system name. Devices can
be organised in subsystems. Each device requires an individual device address.
For more information regarding BCOM, refer to the BCOM manual (D00256)
at
When address 0 has been set for communication via BCOM the device can
be accessed via the network (e.g. for parameter setting, etc.) but it cannot
communicate with other devices.
11.3 Modbus TCP
Modbus is an international widely used protocol for data transfer between devices.
All measured values, messages and parameters are stored in virtual register addresses.
Data can be read out with a read command on the register address. With a write com-
mand, data can be written into a register address.
The register addresses of the individual measured values und parameters can be found
in the manual "iso685-D Annex A" with the title "ISOMETER® iso685 device family - Mod-
bus settings" at
A maximum of 5 TCP/IP connections can be used simultaneously.
In order to be able to parameterise the device externally via Modbus, the
menu item "Allow" must have been set in the "Write access" menu (see
