Specifications

Analog Output Modules
358
31007715 6/2008
Predefined
Fallback Values
For example, in the 1 to 5 VDC scale, if an output channel’s fallback mode is a
predefined state, you may configure that channel to go to any value in the range -
768 to 32 767, where 0 represents 1 VDC and 32 000 represents 5 VDC.
Both output channels go to a predefined fallback state of 1 VDC.
To modify a fallback state from its default setting or to revert back to the default from
an on setting, you need to use the Advantys configuration software:
Channel
Operation
(Enable/Disable)
The STB AVO 0200 has an output channel enable/disable on a per-channel basis.
You can disable the unused outputs. By default, all outputs are enabled. When you
disable a channel, its output is set to 0 VDC, and any data written to the output
register is ignored. The status byte returns all zeros when the channel is disabled,
and the fault indicator does not blink.
z channel enable (default)
z channel disable
Note: If an output channel has been configured with hold last value as its fallback
mode, any value that you assign its fallback state parameter is set to zero.
Step Action Result
1 Make sure that the Fallback Mode value
for the channel you want to configure is
predefined state.
If the Fallback Mode for the channel is
hold last value, any value entered in the
associated Predefined Fallback Value
row will be ignored.
2 Click the + sign to expand the Predefined
Fallback Value settings fields.
Rows for Channel 1 and Channel 2
appear.
3 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.
4 Double-click the channel value(s) you
want to change. Then type in the desired
value(s).
The software displays the min/max
values of -32 768 and +32 767 at the
bottom of the module editor screen.
Note: If you type a value that is out of range, e.g., a negative value when the range
is 1 to 5 VDC, the system applies a fallback state of 0 to the output channel.
Note: If both channels are disabled when PDM power is removed, the ERR LED
does not flash.
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