User Manual

OPERATION 6
71
OPTIWAVE 7400-24 C
www.krohne.com12/2015 - 4004901901 - MA OPTIWAVE7400-24 R01 fr
6.4.4 HART
®
network configuration
The device uses HART
®
communication to send information to HART
®
-compatible equipment. It
can operate in either point-to-point or multidrop mode. The device will communicate in
multidrop mode if you change the address.
How to change from point-to-point to multidrop mode
• Enter the supervisor menu.
• Push [>
>>
>], 5 × [

] and [>
>>
>] to go to menu item ADDRESS (2.6.1).
• Push [>
>>
>] to change the value. Enter a value between 1 and and push [^
^^
^] to confirm (refer to
the caution before this procedure).
• Push [^
^^
^] to go back to the "STORE" screen.
• Push [

] or [

] to set the screen to STORE YES
STORE YESSTORE YES
STORE YES and push [^
^^
^].
i The output is set to multidrop mode. The current output is set to 4 mA. This value does not
change in multidrop mode.
How to change from multidrop to point-to-point mode
• Enter the supervisor menu.
• Push [>
>>
>], 5 × [

] and [>
>>
>] to go to menu item ADDRESS (2.6.1).
• Push [>
>>
>] to change the value. Enter the value 0 and push [^
^^
^] to confirm.
• Push [^
^^
^] to go back to the "STORE" screen.
• Push [

] or [

] to set the screen to STORE YES
STORE YESSTORE YES
STORE YES and push [^
^^
^].
i The output is set to point-to-point mode. The current output changes to a range of 4...20 mA
or 3.8...20.5 mA (this range is set in menu item RANGE I (2.4.2)).
6.4.5 Distance measurement
The device displays distance measurements when the output function is set to "Distance".
Menu items related to distance measurement are:
• Output Function (2.4.1)
• Tank Height (2.3.1)
• Blocking Distance (2.3.2)
Use the flange facing as the reference point for the 4 and 20 mA current output settings. The 4
and 20 mA current output settings are the minimum and maximum points of the measurement
scale.
INFORMATION!
For more data, refer to Networks on page 47
.
CAUTION!
Make sure that the address for this device is different from others in the multidrop network.