Page 126 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS A5E33329501
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General Operation
Configuring communication ports
HART modem
Device Address
The unique identifier of the SITRANS LUT400 on a HART network.
Set the device address or poll ID on a HART network.
Prior to HART 6, the device address was set to 0 for point to point operation. For HART
Multi-drop mode, the device was set to any value other than 0 within the range. (Setting a
non-zero address forced the device into fixed current mode.)
With HART 6 and above (version 7.2 supported by LUT400), Multi-drop mode no longer
depends on the device address. (However, it is recommended that a non-zero address be
set to avoid confusion based on previous HART requirements).
To set the LUT400 in Multi-drop mode, disable
Loop current mode
via one of the HART
communication software tools (such as SIMATIC PDM). When
Loop current mode
is
disabled, a low fixed current is used, allowing for multiple devices to be connected.
See
4.1. Device Address
on page 217.
USB cable
See
Communications
on page 24 for typical setup via USB, then follow instructions under
Installing the USB driver
in the LUT400 Communications manual
1
.
Communication troubleshooting
See
Communication Troubleshooting
on page 231 of
Diagnosing and Troubleshooting
.
Note: It is recommended that only HCF registered modems be used.
Values
Range: 0 to 63 (Set within range of 0 to 15 if HART 5 master used.)
Default: 0
Note: Loop current mode can not be disabled via LUI or Web Browser.
1.
Communications for SITRANS LUT400 (HART) Manual (7ML19985NE01).
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