Specifications

Analog Output Modules
298
31007715 6/2008
Fallback States If an output channel’s fallback mode is predefined state, you may configure that
channel to go to any value in the valid range.
z If you are using an unsigned output data format, the valid range is -1 000 to
32 767 ( (0xFC18 to 0x7FFF), where 0 represents 4 mA and 32 000 represents
20 mA. (A value of -1000 represents 3.28 mA, and a value of 32 767 represents
20.384 mA.)
z If you are using a signed output data format, the valid range is 0 to 65 535
(0x0000to0xFFFF), where 0 represents 4 mA and 64 000 represents 20 mA. (A
value of 65 535 represents 20.384 mA; you cannot drive the current below 4 mA
when the signed data format is used.)
By default, both output channels go to a predefined fallback state of 4 mA.
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 ACO 0320 has an output channel enable/disable on a per-channel basis.
You can disable the unused outputs. By default, all outputs are enabled upon auto
configuration. When you disable a 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 an output channel has been configured with hold last value as its fallback
mode, any value that you assign its fallback state parameter will be ignored.
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 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.
3 Click the + sign to expand the +
Predefined Fallback Value Settings
fields.
Rows for Channel 1 and Channel 2 appear.
4 Double-click the channel value(s) you
want to change. Then type in the
desired decimal or hexidecimal value(s)
to represent the current.
The software displays the max/min values of
the range at the bottom of the module editor
screen. The displayed values are data
format-dependent
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com