Specifications

Analog Output Modules
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STB ACO 0120 Functional Description
Functional
Characteristics
The STB ACO 0120 module is an isolated one-channel analog output module that
sends outputs to the field actuator. 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 ACO 0120 module
you want to configure in the island editor.
The selected STB ACO 0120 module
opens in the software module editor.
2 Choose the data display format by either
selecting or clearing the Hexadecimal
check box at the top right of the editor.
Hexadecimal values will appear in the
editor if the check box is selected;
decimal values will appear if the check
box is cleared.
3In 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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