General Operation
7.15 SITRANS LUT400 Communication Systems
SITRANS LUT400
160 Operating Instructions, 07/2019, A5E33329501-AC
7.15.3 Configuring communication ports
7.15.3.1 HART modem
Note
It is recommended that only HCF registered modems be used.
Device Address
The unique identifier of the SITRANS LUT400 on a HART network.
Values
Range: 0 to 63 (Set within range of 0 to 15 if HART 5 master used.)
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
HARTcommunication 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.
Note
Loop current mode cannot be disabled via LUI or Web Browser.
See also
Device Address (4.1.) (Page 260)
7.15.3.2 USB cable
See Communications (Page 41) for typical setup via USB, then follow instructions under
Installing the USB driver in the LUT400 Communications manual
1
.
1)
Communications for SITRANS LUT400 (HART) Manual (7ML19985NE01).
7.15.4 Communication troubleshooting
See Communication Troubleshooting (Page 267) of Diagnosing and Troubleshooting
(Page 267).
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