Specifications

Analog Output Modules
31007715 6/2008 343
Predefined
Fallback Values
If the output channel’s fallback mode is predefined state, you may configure the
channel to go to any value in the range -1 000 to 32 767, where 0 represents 4 mA
and 32 000 represents 20 mA.
By default, the output channel goes to a predefined fallback value of 4 mA.
To modify the fallback state from its default setting or to revert back to the default,
you need to use the Advantys configuration software:
Channel
Operation
(Enable/Disable)
The STB ACO 0120 output channel has an enable/disable feature. By default, the
output is enabled. When you disable the channel, its output is set to minimum output
current, 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 the 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, the Predefined
Fallback Value is set to 0.
2 Click the + sign to expand the
Predefined Fallback Value settings
fields.
The row for Channel 1 appears.
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 you want
to change. Type in the desired value.
The software displays the min/max
value of the range at the bottom of the
module editor screen.
Note: If the channel is disabled and the PDM power is removed, the ERR LED
does not flash.
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