Siemens SENTRON ATC6300, Руководство пользователя, Страница: 47 / 210

Functions
5.1 Basic functions
3KC ATC6300 transfer control device
Manual, 03/2018, L1V30535632002A-01
45
5.1.5 Communication COMx
No more than two communication modules identified as COMn may be connected to the
ATC6300.
The communications setup menu therefore contains two sections (n=1 ... 2) with parameters
for the configuration of the communication ports.
The communication channels are completely independent, both in terms of the hardware
(type of physical interface) and in terms of the communication protocol. The communication
channels are able to function simultaneously.
The Ethernet expansion module enables communication via MODBUS TCP and the RS485
expansion module enables communication via MODBUS RTU.
For additional information on MODBUS, please refer to chapter P08 - Communication
(Page 134).
Addressing the expansion modules for communication
If only one expansion module for communication is installed in the ATC6300 it is designated
COM1, regardless of whether it is inserted in slot 1 or 2.
If there are two communication modules in the ATC6300, the module in slot 1 is addressed
as COM1 and the module in slot 2 as COM2.
Note
Addressing on removal of a module
If there are two modules in the device and the module in slot 1 is subsequently removed,
then the addressing of the remaining module changes from COM2 to COM1.
The device will point out this change at the necessary restart (see chapter Behavior of the
ATC6300 after inserting a module (Page 44)).