Pilz PSSu E S 2AI U - Manual (Page 17)

Function description
Operating Manual PSSu E S 2AI U(­T)
21405­EN­03 17
4.2.3.3 Manufacturer scaling
The manufacturer scaling is used to define the offset (zero point compensation) and gain
(amplification) of the digital signal.
Manufacturer scaling active (default setting)
} Default values for manufacturer scaling:
– Offset (b
1
): 0
– Gain (a
1
): 8194
D
(2002
H
)
INFORMATION
The default setting for gain (a
1
) means an amplification factor of 8.
The digital value after manufacturer scaling is calculated using the following for­
mula:
} y = (a
1
/ 1024
D
* x) + b
1
or
} y = (a
1
/ 400
H
* x) + b
1
Legend:
} y: Digital value after manufacturer scaling
} x: Digital value before manufacturer scaling
} a
1
: Gain
} b
1
: Offset
} a
1
/ 1024
D
: Amplification factor
INFORMATION
With the given amplification factor, gain (a
1
) is calculated as follows:
Gain (a
1
) = Amplification factor * 1024
D
Amplification by 5 % is therefore:
1.05 * 1024
D
= 1075
D
Arithmetic examples using decimal values:
Digital value
before manu­
facturer scaling
(x)
Gain (a
1
) Offset (b
1
)
Amplification
factor (a
1
/ 1024
D
)
Value after
manufacturer
scaling (y)
1 000 1 024 0 1 1 000
1 000 2 048 0 2 2 000
1 000 8 192 0 8 8 000
1 000 1 075 500 1.05 1 550
1 000 512 ­50 0.5 450