Figure 38: Defining Modbus Communication Parameters - Gamatronic Centric 3x480 Vac User Manual

The Centric's Modbus interface is compatible with most Building Management Systems (BMSs), using the
register numbers shown in Table 6.
Note: The registers in Table 6 can be addressed either as holding registers (for example, 4x0001) or as
input registers (for example, 3x0001).
7.2.7.4.1 D
EFINING A
Enter a unit ID (the Centric's ID on the Modbus network) and a TCP port number, as supplied by your
Modbus network administrator, and select the "Allow TCP Modbus" checkbox.
7.2.7.4.2 D
EFINING A SERIAL
Choose a protocol (RTU or ASCII) and a baud rate, as recommended by your Modbus network
administrator, and select the "Allow serial Modbus" checkbox.
The Centric's physical connection for serial Modbus is a D9 connector located in "connector group 2" and
labeled RS485. (See the Centric 3x480 Installation Guide for more information about this connector.
50
G
AMATRONIC
TCP M
ODBUS LINK
M
ODBUS LINK

Figure 38: Defining Modbus communication parameters

E I L
LECTRONIC NDUSTRIES
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TD
CENTRIC 3x480, User Guide, rel. 1.7