AutomationDirect DL205, Manual

Page: 288 / 359

DL205 Analog Manual, 7th Edition Rev. D 14-18
Chapter 14: F2-4AD2DA, 4-Ch. In / 2-Ch. Out Analog Combination
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Read Input Values (Multiplexing)
The DL230 CPU does not use special V-memory locations for transferring data. Since all
channels are multiplexed into a single data word, the control program must be setup to
determine which channel is being read. Since the module appears as X input points to the
CPU, simply use the active channel status bits to determine which channel is being read.
Note, this example is for a module installed in slot 3, as shown in the previous examples. The
addresses used would be different if the module was used in a different slot. These rungs can
be placed anywhere in the program or if stage programming is being used, place them in a
stage that is always active.
This multiplexing example can be used with all of the DL205 CPUs.
It is usually easier to perform math operations in
BCD, You can leave out this instruction if your
application does not require it.
This instruction masks the channel identification bits.
Without this, the values used will not be correct so do
not forget to include it.
Loads the complete data word into the accumulator.
The V-memory location depends on the I/O
configuration. See Appendix A for the memory map.
Load data when module is not busy.
LD
V40401
ANDD
KFFF
BCD
X36
X36 X34 X35
Store Channel 1
OUT
V2000
When the module is not busy and X36, X34 and X35
are off, channel 1 data is stored in V2000.
When the module is not busy and X34 is on and X35
and X36 are off, channel 2 data is stored in V2001.
When the module is not busy and X34 and X36 are
off and X35 is on, channel 3 data is stored in V2002.
When the module is not busy and both X34 and X35 are
on and X36 is off, channel 4 data is stored in V2003.
X36 X34 X35
Store Channel 2
OUT
V2001
X36 X34 X35
Store Channel 3
OUT
V2002
X36 X34 X35
Store Channel 4
OUT
V2003