Quick start with ProLink II
Prerequisites
You must have the following version of ProLink II installed on your computer: v2.91 or later.
3.2.1
ProLink II connection types
The 9739 MVD transmitter has several connections options for communicating via ProLink II. You
choose a connection type based on what you need to accomplish with the transmitter and the digital
communications you are using.
The 9739 MVD transmitter supports the following ProLink II connection types:
• Service port connections
• HART/Bell 202 connections
• HART/RS-485 connections
• Modbus/RS-485 7-bit connections (Modbus ASCII)
• Modbus/RS-485 8-bit connections (Modbus RTU)
When selecting a connection type, consider the following:
• Service port connections use standard connection parameters that are already defined in
ProLink II, and therefore you do not have to configure them.
• HART/Bell 202 connections use standard HART connection parameters that are already defined in
ProLink II. 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 only accessible after removing the housing cover. Accordingly, service
port connections should be used only for temporary connections, and may require extra safety
precautions.
• Modbus connections, including service port connections, are typically faster than HART
connections.
• When you are using a HART connection, ProLink II 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 a service port connection while an active connection exists between the
transmitter and Modbus host.
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Micro Motion 9739 MVD Transmitters