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18 ProLink

II Software for Micro Motion

Transmitters

Installation and Setup

Figure 2-12 Modbus/RS-485 connection to RS-485 terminals on MVD Direct Connect I.S. barrier

2.6 Configure ProLink II connection parameters

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

transmitter.

• If you are connecting to an MVD Direct Connect system, ProLink II can use any of the

supported communication settings listed in Table 2-2. The core processor auto-detects

incoming communications parameters and switches to match.

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

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

- 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 2-3.

• 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.

RS-485 to RS-232

signal converter

Attach serial port or USB

adapter if necessary

RS-485/B

RS-485/A

I.S. barrier

Non-I.S. terminals

Notes:

• Ensure that no other Modbus master devices are currently active on the network.

• Before using ProLink II to communicate with the core processor, disconnect any wiring to a remote PLC.

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