Reference Channel 1; Reference Channel 2 Or Multiplexer; Element Flags - Ahlborn ALMEMO 2590-2 Operating Instructions Manual

12. Sensor programming

12.12.6 Reference channel 1

The calculating functions of the function channels usually refer to one (or two)
particular measuring channel(s) (see 12.10, Manual 6.3.4). When program-
ming a function channel the reference channel M
by the 1st channel of the associated sensor connector M
channel M (for differential value, average value M(n), etc.) is provided initially
b2
by measuring point M00. In the function
set another measuring point as reference channel - either one specified mea-
suring point or an unspecified measuring point chosen according to the dis-
tance relative to the function channel (where -01 is the channel in front of the
function channel).
Programming reference channel 1, absolute : 1 Reference channel 1:
Programming reference channel 1, relative : 1 Reference channel 1:

12.12.7 Reference channel 2 or multiplexer

With those function channels needing a 2nd reference channel (see above)
Reference channel 1 is followed automatically by the function Reference
channel 2 . In all other normal measuring ranges the Multiplexer function can
be used to change the input multiplexer and thus the pin assignment in the
connector (see Manual 6.10.2).
Programming reference channel 2, absolute :
Programming reference channel 2, relative :
Measuring inputs B+ and A-, GND-referred
Measuring inputs C+ and A-, GND-referred
Measuring inputs D+ and A-, GND-referred
Differential measuring inputs C+ and B-
Differential measuring inputs D+ and B-

12.12.8 Element flags

Element flags can be activated per measuring channel to implement additional
functions specific to each sensor (see Manual 6.10.3).
1. 1/10 measuring current for Pt1000, 5000Ω
3. Measuring bridge with switch for end-value simulation
4. Measuring channel, cyclic evaluation only
7. Disable sensor breakage detection
8. Analog output 4-20 mA instead of 0-20 mA
On the ALMEMO 2590 element flags 2, 5, 6 have no function.
Function Element flags :
To program element flags :
To select element flags :
To enable / disable element flags :
58 ALMEMO
PROG
® 2590
is is provided automatically
b1
. The 2nd reference
xx
1
Reference channel 1
1 Reference channel 2:
1 Reference chan.
1 Multiplexer:
1 Multiplexer:
1 Multiplexer:
1 Multiplexer:
1 Multiplexer:
Element flags:
Element flags:
and
►
and
▲
you can also
01
-10
00
2: -01
B-A
C-A
D-A
C-B
D-B
87654321
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