JUMO 706581 LOGOSCREEN nt Operating Manual - Manual (Page 28)

2 Instrument Description
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2.6 Math/Logic Module
The math and logic module is available as an extra. Like the counters/
integrators, the math and logic module are channels that are not available as
hardware but are calculated by the instrument software.
The math and logic module consists of two parts:
- the math module for calculating analog values and
- the logic module for linking Boolean values (0 or 1).
Math module The math module provides 18 measurement inputs for calculating new
“virtual” channels.
For the calculated channels, separate math channels are provided in addition
to the internal analog inputs. In configuration, you have to activate the required
math channel in the group configuration and thus assign it to a group.
Configuration ➔ Group x ➔ Analog channels ➔ Channel x = Math x
Setupprogram How a math channel is formed is determined through the setup program.
As variables for the formulae, the following may be available:
- Analog inputs
- Binary inputs
- Counters/integrators
- Alarms
- Errors
If counter/integrator values are used for calculation, then please note that their
accuracy is reduced, since, in this case, two different data formats will have to
be used for calculation. Counters/integrators are calculated in double-float
format (8 bytes per value), whereas the math module employs a single-float
format (4 bytes per value) according to the IEEE 754 standard. Nevertheless, it
is possible to include these values in the math module.