Emerson Network Router Manuel D’Utilisation

26

®

 II Software for Micro Motion

®

 Transmitters

To connect to the transmitter, ProLink II must use connection parameters appropriate to the 
transmitter.

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If you are connecting to an MVD Direct Connect system, ProLink II can use any of the 
supported communication settings listed in Table 2-13. The core processor auto-detects 
incoming communications parameters and switches to match.

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If you are connecting to a Model 2400S transmitter using the service port:

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For point-to-point connections, you can use a service port connection type.

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For multidrop network connections, you can use any Modbus/RS-485 connection type and 
specify the transmitter’s Modbus address. The transmitter auto-detects incoming 
communications parameters and switches to match. The service port auto-detection limits 
are described in Table 2-14.

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If you use a service port or HART/Bell 202 connection type, the connection parameters are 
standard: when one of these connection types is specified, ProLink II automatically uses the 
appropriate parameters.

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HART/Bell 202 connections are always available on all transmitters.

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Service port connections are always available for all Model 1700/2700 transmitters and for 
all Model 2400S transmitters.

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For Model 1500/2500 transmitters and Series 3000 transmitters, the RS-485 terminals are 
accessible as a service port for a 10-second interval after power-up:

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If a service port connection is made during this interval, the port will remain in service 
port mode indefinitely until power is cycled.

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If no service port connection is made during this interval, the terminals switch to 
Modbus/RS-485 mode, and must be accessed using the RS-485 communication 
settings configured in the transmitter.

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If you use any other connection type, you must configure ProLink II connection parameters to 
match the transmitter’s configuration. If you do not know the transmitter’s configuration, you 
can use a Communicator or the transmitter’s display to view or change its configuration. 

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For all transmitters, if you are using HART protocol, you can specify the transmitter’s 
HART tag (software tag) instead of the HART address, if a HART tag has been configured 
in the transmitter.

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For all Series 1000/2000/3000 transmitters, see Table 2-15 for default values for each 
connection type.

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For IFT97xx transmitters, communication parameters are not configurable. Settings are 
listed in Table 2-16. Configure ProLink II connection parameters to match these settings.

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For RFT97xx transmitters, communication is configured using switches and jumpers on 
the transmitter. Check your transmitter and refer to the transmitter manual to determine 
your transmitter’s configuration, then configure ProLink II connection parameters to 
match these settings. Factory default settings for these transmitters are listed in Table 2-16.

For a discussion of the advantages of each connection type, see Section 3.3.1.