Modbus Serial Network Interface - Emerson Micro Motion User Manual

Connector pin assignments
January 2019
A.3.1 Ethernet Config Tool system requirements
• Pentium 133 MHz or higher
• 10 MB of free space
• 8 MB RAM
• Windows NT v4.0 or higher, Windows 2000, or Windows XP
• Internet Explorer v4.01 SP1 or higher
A.3.2 Install the Ethernet Config Tool
Procedure
1. Install the software program. Locate and run the EtherNet/IP Module setup
2. Connect the configuration cable from your PC to the EtherNet/IP Module.
Related concepts
Micro Motion Ethernet Config Tool installation (optional)
A.4

Modbus serial network interface

The Modbus serial network is based on an RS-485 physical layer.
A.4.1 Bias resistors
When idle, RS-485 enters an indeterminate state, which may cause the serial receivers to
pick up noise from the serial lines and interpret this as data. To prevent this, the serial lines
should be forced into a known state using pull-up and pull-down resistors, commonly
known as bias resistors.
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program on the EtherNet/IP Module Resource CD and follow the on-screen
instructions.
Note
For information on the Micro Motion Ethernet Config Tool user interface, see the
Anybus Communicator manual.
User Guide
MMI-20019808
Micro Motion EtherNet/IP Module