DL205 Analog Manual, 7th Edition Rev. D
7-16
Chapter 7: F2-04THM, 4-Channel Thermocouple Input
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B
C
D
Magnitude Plus Sign (BCD)
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b
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D
SP1
OUT
C1
LDD
V2000
OUTD
V2010
Load channel 1 data from V-memory into the
accumulator. Remember, the data can be negative.
Contact SP1 is always on.
Put the actual signal value in V2010. Now you can use
the data normally.
ANDD
K7FFFFFFF
This instruction masks the sign bit of the BCD data, if it
is set. Without this step, negative values will not be
correct so do not forget to include it.
V2001
K8000
Check Channel 1
Check Channel 2
Channel 1 data is negative when C1 is on (a value of
--1.0 reads as 8000 0010, --2.0 is 8000 0020, etc.).
SP1
OUT
C2
LDD
V2002
OUTD
V2012
Load channel 2 from V-memory into the accumulator.
Remember, the data can be negative. Contact SP1 is
always on.
Put the actual signal value in V2012. Now you can use
the data normally.
ANDD
K7FFFFFFF
This instruction masks the sign bit of the BCD data, if it
is set. Without this step, negative values will not be
correct so do not forget to include it.
V2003
K8000
Channel 2 data is negative when C2 is on (a value of
--1.0 reads as 8000 0010, --2.0 is 8000 0020, etc.).
²
²
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