Comtrol Modbus TCP User Guide - Manual (Page 10)

10 - Chapter 1. Introduction DeviceMaster UP Modbus/TCP User Guide: 2000447 Rev. I
Advanced Modbus System Architecture (Firmware 5.x)
1.4.3. Advanced Modbus System Architecture (Firmware 5.x)
Using the Modbus/TCP V5.x firmware provides greatly enhances connectivity options. New options include:
• New Modbus support:
- Modbus/ASCII serial slave device support.
- Modbus/RTU and Modbus/ASCII serial master support. Modbus/RTU and Modbus/ASCII masters
can now connect to Modbus/RTU serial slaves, Modbus/ASCII serial slaves, and both serial and
Ethernet TCP/IP raw/ASCII devices.
• New raw/ASCII functionality:
- Selectable Message Transfer mode
- Data-Stream - Transmit all message to devices immediately. Return all receive data/responses to all
PLC and Application Ethernet TCP/IP connections.
- Command/Response - Transmit messages one command at a time and wait for response(s). Return all
response(s) to command sender only.
This version of the firmware allows up to six Application Ethernet TCP/IP connections for each serial or
socket port configuration. (Device Ethernet TCP/IP configurations still only allow one connection per device.)
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