Emerson Network Router, User Manual

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26 ProLink
®
II Software for Micro Motion
®
Transmitters
Using ProLink II Software
• Service port connections:
- Service ports use standard connection parameters, so you do not have to know the
transmitter’s configuration.
- ProLink II uses Modbus protocol for service port connections, which is the fastest protocol
available.
- On Model 1700/2700 transmitters, LF-Series field-mount transmitters, and Model 2400S
transmitters, the service port is always available.
- On Model 1500/2500 transmitters, LF-Series DIN-rail transmitters, and Series 3000
transmitters, the service port is available only for ten seconds after power-up. For service
port access, you will have to power down the transmitter, which may not be acceptable in
your installation.
- On Series 1700/2700 and LFT field-mount transmitters, you must open the wiring
compartment to access the service port. On Model 2400S transmitters, you must remove
the housing cover. Therefore, on these transmitters the service port is appropriate only for
temporary connections.
• HART/Bell 202 connections:
- HART/Bell 202 connections use standard connection parameters, so you don’t have to
know the transmitter’s configuration.
- Because the HART/Bell 202 connection is made over the primary mA output terminals,
the communication signal can interfere with certain procedures such as loop testing, and
may cause the output to change. Depending on how the primary mA output is being used,
this may have significant consequences for process control.
- Depending on the transmitter and wiring method, HART/Bell 202 connections may be
appropriate for both temporary and permanent connections.
• RS-485 connections:
- To use an RS-485 connection, you must know the transmitter’s configuration.
- RS-485 connections are appropriate for both temporary and permanent connections.
Making the connection – Model 7826 and 7828
1. Ensure that your PC is connected to a transmitter, using one of the methods described in
Chapter 2.
2. Choose
Connection > Connect to Densitometer/Viscometer
. See Figure 3-1.
3. Set
Serial Port
to the PC COM port you are using to connect to the device.
4. If you know the address of the device and you want to communicate with this product only,
enter the device address in both the
From Address
and
To Address
fields.
5. If you do not know the address, or if you want to communicate with multiple devices, enter a
range of device addresses using the
From Address
and
To Address
fields.
6. Click
Connect
.
ProLink II will poll all addresses in the specified range, and populate the
Found
list with all
Model 7826/7828 that it finds in that range. When polling is complete, select the desired address from
the
Found
list. To switch to a different device, return to the connection window and select a different
address from the
Found
list.