AutomationDirect DL205 - Understanding the Output Assignments; Channel Select Outputs

DL205 Analog Manual, 7th Edition Rev. D
11-10
Chapter 11: F2-08DA-2, 8-Channel Analog Voltage Output
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A
B
C
D
Understanding the Output Assignments
Remember that the F2-08DA-2 module appears to the CPU as a 16-point discrete output
module. These points provide the data value and an indication of which channel to update.
Note, if either a DL240, DL250 or a DL260 CPU is being used, these bits may never have to
be used, but it may be an aid to help understand the data format.
Since all output points are automatically mapped into V-memory, the location of the data
word that will be assigned to the module can be simply determined.
Channel Select Outputs
Three of the outputs select the active channel.
Remember, the V-memory bits are mapped
directly to discrete outputs. The binary weight
of these three bits determines which channel is
selected. The channel to be updated is controlled
by these three outputs.
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A
b
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Y
2
0
Data Bits
Y
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F2-08DA--2
V40501
BSLBSM
V40500V40502
16pt
Input
8pt
Input
16pt
Output Output
8pt16pt
Output
X0
--
X17
X20
--
X27
Y0
--
Y17
Y20
--
Y37
Y40
--
Y47
Slot 0Slot1 Slot 2Slot3 Slot 4
Y
3
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Y
3
6
=channel select outputs
Y
3
5
V40501
BSLBSM
Y
2
0
Y
3
4
Y
3
6
Select Channel Outputs
Y36 Y35 Y34
Channel Number
Selected
– – – 1
– – X 2
– X – 3
– X X 4
X – – 5
X – X 6
X X – 7
X X X 8
The individual bits in this data word
location, represents specific infor-
mation about the analog signal.