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4.3 CIU 262 Cellular Modbus
The table below provides an overview of the specifications for
Grundfos CIU 262. For further details, refer to the specific
sections of this functional profile.
Modbus cellular specifications
Data protocol
Slave address
Cellular-connection visual diagnostics
Maximum Modbus telegram size
4.4 CIU 502 Modbus TCP
The table below provides an overview of the specifications for
Grundfos CIU 502 for Modbus TCP. For further details, refer to
the specific sections of this functional profile.
Modbus TCP specifications
Application layer
Transport layer
Internet layer
Link layer
Ethernet cable
Maximum cable length
Transmission speed
Industrial ethernet protocols
Description
Modbus RTU/Modbus TCP
Factory 231 (0xE7)
LED1
260 bytes
Description
DHCP, HTTP, Ping, FTP, SMTP, SNTP,
Modbus TCP
TCP
Internet protocol V4 (IPv4)
ARP, media access control (ethernet)
Screened or twisted-pair cables, CAT5,
CAT5e or CAT6
100 m
10 Mbits/s, 100 Mbits/s (auto-detected)
PROFINET IO, Modbus TCP
Comments
Call-up connection uses RTU.
Data connection uses TCP.
Can be changed via Modbus register 00003,
SoftwareDefinedModbusAddress.
See section
6.2
LEDs.
Total Modbus TCP/IP application data unit. See fig. 21.
Comments
Rotary switch in position 1.
Supports Auto-MDIX
Selected with rotary switch, section
Industrial Ethernet
protocol.
7.2 Setting the
7
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