Comtrol Modbus Server - Manual (Page 10)

10 - Modbus Server Application Overview DeviceMaster Modbus Server User Guide: 2000535 Rev. C
Modbus/TCP - Multiple Modbus Master and Slave Types, Serial and Ethernet Raw/ASCII Devices
• Master-to-Master connectivity (via Shared Memory subsystem)
• Isolation of serial Modbus slaves (via Private Serial Bus connectivity)
• Write protection of serial Modbus slaves
• Modbus Device ID conflict resolution
Modbus/TCP -
Multiple Modbus
Master and Slave
Types, Serial and
Ethernet Raw/ASCII
Devices The Modbus/TCP firmware has been designed to provide great flexibility for
connecting both Modbus serial slaves and raw/ASCII devices to a variety of
Modbus controllers and applications.
Such advanced raw/ASCII options as filtering, command/response mode, peer-to-
peer Modbus communications and simultaneous connections to multiple Modbus
controllers and/or Ethernet TCP/IP applications make the Modbus/TCP firmware
the flagship of all Modbus to raw/ASCII gateways.
Modbus/TCP firmware supports the following controllers:
• Modbus/TCP masters and slaves
• Modbus/RTU and Modbus/ASCII serial masters and slaves
• Applications over Ethernet TCP/IP connections (raw/ASCII only)
Modbus/TCP firmware supports the following devices:
• Raw/ASCII devices, both serial and Ethernet TCP/IP, such as barcode
scanners, vision systems, RFID readers, weigh scales, encoders and printers
• Modbus/RTU and Modbus/ASCII serial slaves
• Modbus/TCP firmware is recommended in installations that require:
• Connectivity to serial and/or Ethernet TCP/IP raw/ASCII devices
• Connectivity to Modbus/RTU and/or Modbus/ASCII serial devices
• Connectivity from single or multiple Modbus masters and/or applications to
the devices
• Automatic Modbus protocol translations (if needed)