Emerson Network Router, User Manual

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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.