41-621.1 HART
®
to Modbus
®
Adaptor Operating Manual
17
4.
Using a Handheld Field Communicator with the HMA
4.1.
Purpose
This procedure instructs how to connect a handheld communicator, such as the Emerson 475, to the
HMA to configure or troubleshoot an attached HART transmitter.
4.2.
Equipment
Item
Manufacturer
Model
HART to Modbus Adaptor
MII
031-2859-001
Power Supply
-
20-24V, 0.5A
PACTware
PACTware Consortium
Version 4.1 or higher
Field Communicator
Emerson
475
Level transmitter
MII
Model 706
Probe
MII
Model 706 compatible
4.3.
Setup
Connect the HMA, with an attached HART transmitter, to a power supply via the power terminal block.
Connect the field communicator to the HART terminal block on the HMA. Note that the HMA provides
24 VDC on the terminal block and contains an internal 250-ohm resistor, so the field communicator can
be directly connected to the terminal block.
4.4.
Procedure
4.4.1
Start the field communicator.
4.4.2
Ensure that the field communicator is configured to scan for the HART Poll Address of the
transmitter. (The Poll Address can be read from the Device Setup\Advanced
Config\
Analog Output menu on the transmitter’s local display.)
4.4.3
When the field communicator finds the device, sele
ct it from the communicator’s menu.
4.4.4
All features of the HART DD for the transmitter will be available. Note that since the field
communicator is acting as a secondary master and the HMA is periodically sending
commands as the primary master, the response of the field communicator will be slower
than when it is connected directly to a transmitter.
Содержание Jupiter JM4
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