Figure C-7: Connection over multidrop network
B
A
C
D
A. RS-232 to Bell 202 converter
B. 250–600 Ω resistance
C. Devices on the network
D. Master device
5. Start ProLink III.
6. Choose
Connect to Physical Device
.
7. Set
Protocol
to HART Bell 202.
Tip
HART/Bell 202 connections use standard connection parameters. You do not need to configure them
here.
8. If you are using a USB signal converter, enable
Toggle RTS
.
9. Set
Address/Tag
to the HART polling address configured in the transmitter.
Tip
•
If this is the first time you are connecting to the transmitter, use the default address: 0.
•
If you are not in a HART multidrop environment, the HART polling address is typically left at the
default value.
•
If you are unsure of the transmitter’s address, click
Poll
. The program will search the network and
return a list of the transmitters that it detects.
10. Set the
PC Port
value to the PC COM port that you are using for this connection.
11. Set
Master
as appropriate.
Option
Description
Secondary Use this setting if a primary HART host such as a DCS is on the network.
Primary
Use this setting if no other primary host is on the network. A field communicator is a
secondary host.
Configuration and Use Manual
Using ProLink III with the transmitter
MMI-20020954
March 2021
Configuration and Use Manual
177