Connect With Prolink Iii - Emerson Micro Motion 9739 MVD Configuration And Use Manual

Using ProLink III with the transmitter
June 2019
B.2 Connect with ProLink III
A connection from ProLink III to your transmitter allows you to read process data, configure the transmitter,
and perform maintenance and troubleshooting tasks.
B.2.1 Connection types supported by ProLink III
Different connection types are available for connecting from ProLink III to the transmitter. Choose the
connection type appropriate to your network and the tasks you intend to perform.
The transmitter supports the following ProLink III connection types:
• Service port connections
• HART/Bell 202 connections
• HART/RS-485 connections
• Modbus/RS-485 8-bit connections (Modbus RTU)
• Modbus/RS-485 7-bit connections (Modbus ASCII)
When selecting a connection type, consider the following:
• Service port connections are specialized Modbus/RS-485 connections that use standard connection
parameters and a standard address that are already defined in ProLink III. Service port connections are
typically used by field service personnel for specific maintenance and diagnostic functions. Use a service
port connection only when another connection type does not provide the functionality you need.
• HART/Bell 202 connections use standard HART connection parameters that are already defined in
ProLink III. The only parameter you must configure is the transmitter address.
• The service port terminals (A and B) and the RS-485 terminals (26 and 27) use the same internal wiring. If
you have wired the transmitter for RS-485 digital communications, you cannot make a service port
connection.
• Service port connections require access to the service port terminals, which are located on the transmitter
display and accessible only after removing the housing cover. Accordingly, service port connections
should be used only for temporary connections, and may require extra safety precautions.
• When you are using a HART connection, ProLink III will not allow you to open more than one window at a
time. This is done to manage network traffic and optimize speed.
• You cannot make concurrent Modbus connections if the connections use the same terminals. You can
make concurrent Modbus connections if the connections use different terminals.
B.2.2 Connect with ProLink III to the service port
Prerequisites
• ProLink III is installed and licensed on your PC
• One of the following:
— RS-232 to RS-485 signal converter
— USB to RS-485 signal converter
• An available serial port or USB port
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Configuration and Use Manual
MMI-20016855
Micro Motion 9739 MVD Transmitters