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4.3 CIM 260 3G/4G cellular
The table below provides an overview of the specifications for Grundfos CIM/CIU 260. For further details, refer to the specific sections of
this functional profile.
4.4 CIM 500 Modbus TCP
The table below provides an overview of the specifications for Grundfos CIM/CIU 500 for Modbus TCP. For further details, refer to the
specific sections of this functional profile.
Modbus cellular specifications Description Comments
Data protocol Modbus RTU/Modbus TCP
Call-up connection uses RTU. Data connection
uses TCP.
Slave address Factory 231 (0xE7)
You can change the address via Modbus register
00003, SoftwareDefinedModbusAddress.
Cellular connection visual diagnostics LED1 See section 6.2 LEDs.
Maximum Modbus telegram size 260 bytes
Total Modbus TCP/IP application data unit.
See fig. 32.
Modbus TCP specifications Description Comments
Application layer DHCP, HTTP, Ping, FTP, SMTP, SNTP, Modbus TCP
Rotary switch in position 1 to select Modbus
TCP.
Transport layer TCP
Internet layer Internet protocol V4 (IPv4)
Link layer ARP, media access control (Ethernet)
Ethernet cable CAT5, CAT5e or CAT6
Supports auto cable-crossover detecting
(Auto-MDIX).
Maximum cable length 100 metres Corresponds to 328 feet.
Transmission speed 10 Mbits/s, 100 Mbits/s Auto-detected.