Remote Automation Solutions Bristol Modbus RTU Serial Communications User Manual

Below you will find brief information for Digital Controller UDC 3300, Digital Circular Chart Recorder 4500T. The UDC 3300 and 4500T support Modbus RTU communication protocol and are designed to provide a popular data exchange connecting these instruments to both Honeywell and foreign master devices. The Modbus RTU allows the instrument to be a citizen on a data link shared with other devices which subscribe to the Modbus RTU RS-485 specification. The specification is respected in the physical and data link layers. The message structure of the Modbus RTU function codes are employed and standard IEEE 32-bit floating point and integer formats are used. Data register mapping is unique to these instruments.

PDF Download
Document
Digital Controller UDC 3300, Digital Circular Chart Recorder 4500T Instruction Manual | Manualzz

Advertisement

Advertisement

Advertisement

Key features

  • Modbus RTU communication protocol
  • RS-485 specification
  • IEEE 32-bit floating point and integer formats
  • Data register mapping
  • Standard Modbus RTU function codes

Frequently asked questions

Modbus RTU is a serial communications protocol widely used for industrial automation and control systems. It allows different devices, such as controllers, sensors, and actuators, to communicate and exchange data over a network.

The UDC 3300 is a Universal Digital Controller designed for industrial automation applications. It can be used to monitor and control various processes.

The 4500T is a Digital Circular Chart Recorder used to record and visualize data from various processes.

Modbus RTU uses a master-slave communication model where a master device polls slave devices for data. It is a robust and reliable protocol that supports a wide range of function codes for various communication tasks.

Data registers are uniquely mapped in these instruments, allowing them to communicate effectively over the Modbus RTU network.

Standard function codes include Read Coil Status (01), Read Input Status (02), Read Holding Registers (03), Force Single Coil (05), Preset Single Register (06), and Preset Multiple Registers (16). These codes are used for various communication tasks, such as reading process data, writing control commands, and configuring the devices.
Preparing document for printing…
0%