Specifications

Analog Output Modules
31007715 6/2008 255
Analog
Output Period
If the data sent by the module 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 (0x5 to 0xFF). By default, the analog output period is 10 (0xA). If you
want to configure a different period, you need to use the Advantys configuration
software:
The analog output period is set at the module level—you cannot configure different
channels to refresh at different intervals.
This parameter is represented as an unsigned 8-bit number. To access this
parameter using RTP, write the following values to the RTP request block:
Step Action Result
1 Double click on the STB
AVO 1250 module you want to
configure in the island editor.
The selected STB AVO 1250 module opens in
the software module editor.
2 Choose the data display format
by either checking or unchecking
the Hexadecimal checkbox at
the top right of the editor.
Hexadecimal values will appear in the editor if
the box is checked; decimal values will appear
if the box is unchecked.
3 In the Value column of the
Analog Output Period row,
enter the desired value.
When you select the Analog Output Period
value, the max/min values of the range appear
at the bottom of the module editor screen.
Length 1
Index (low byte) 0x10
Index (high byte) 0x23
Sub-index 0
Data Byte 1 5 to 255
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