Specifications

Analog Output Modules
356
31007715 6/2008
STB AVO 0200 Functional Description
Functional
Characteristics
The STB AVO 0200 module is a two-channel module that sends analog outputs to
two voltage field actuators. It supports user-configurable operating parameters and
reflex actions. The following operating parameters are user-configurable:
z analog output period
z fallback modes
z fallback states
z channel operation (enable/disable)
Using the RTP feature in your NIM, you can access the value of the following
parameter:
z analog output period
Refer to the Advanced Configuration chapter in your NIM manual for general
information on RTP.
Analog
Output Period
If the data to an analog output channel is not updated by the fieldbus master in a
specified number of milliseconds, the module will refresh the old data held by the
channel. The purpose of this update is to prevent the analog value from drifting in
the event that there is a long interval between data updates. The interval between
refreshes is defined as the analog output period. This period is user-configurable in
the range 5 to 255 ms.
The analog output period is configurable as a decimal or hexadecimal value in the
range 5 to 255. By default, the analog output period is 10. If you want to configure a
different period, you need to use the Advantys configuration software.
Note: Standard NIMs with firmware version 2.0 or later support RTP. RTP is not
available in basic NIMs.
Step Action Result
1 Double-click the STB AVO 0200
module you want to configure in the
island editor.
The selected STB AVO 0200 module opens
in the software module editor.
2 Choose the data display format by
either selecting or clearing the
Hexadecimal checkbox at the top right
of the editor.
Hexadecimal values appear in the editor if
the checkbox is selected; decimal values
appear if the checkbox is cleared.
3 In the Configured Value column of the
Analog Output Period row, enter the
desired value.
Notice that when you select the Analog
Output Period value, the min/max values of
the range appear at the bottom of the
module editor screen.
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