119
UPS for 480 Vac Grid, User Guide, doc. rel.4.0
If the serial communication option is ordered as an add-on to an existing system, the
physical connection details may be different than described above.
8.2.7.5.
(Optional feature) Modbus
The ability to use a Modbus link with the UPS is an optional feature, available by special order. A
password may be required to use this feature. If you do not have the appropriate password,
contact your distributor or sales agent.
Two types of Modbus links can be defined between the UPS and another device on the network:
a serial link or a TCP/IP link. The two types of links are not mutually exclusive. In either case, with
regards to Modbus, the UPS is a slave device to the Modbus master located elsewhere on the
Modbus communication network. The UPS will respond to queries from the Modbus master.
The UPS’s Modbus interface is compatible with most Building Management Systems (BMSs),
using the register numbers shown in Table 7.
The registers in Table 7 can be addressed either as holding registers (for example,
4x0001) or as input registers (for example, 3x0001).
8.2.7.5.1.
Defining a TCP Modbus link
Enter a unit ID (the UPS’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.
8.2.7.5.2.
Defining a serial Modbus link
To define a serial Modbus link:
1.
From the System Menu navigate to Setup > Configuration > Modbus Configuration.
