Pilz PSSu E S 2AO I - Manual (Page 21)

Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
4-5
4.2 Configuration
4 Function description
4.2.3.1 DAC raw value
DAC raw value 4- ][Funktionsbeschreibung_BA_Konfig Skalier DAC
You can configure each channel so that the raw value is transferred di-
rectly to the DA converter, without calibration or scaling.
4.2.3.2 Hardware calibration
Hardware calibration 4- ][Funktionsbeschreibung_BA_Konfig Skalier HW-Abgleich
Each channel is calibrated ex-works in order to correct component dis-
persion and other influences.
The range is divided so that zero is assigned the value 0 and the end
point is assigned the value 4095
D
(0FFF
H
).
4.2.3.3 Manufacturer scaling
Manufacturer scaling 4- ][Funktionsbeschreibung_BA_Konfig Skalier Herst. Aus neu
The manufacturer scaling is used to define the offset (zero point com-
pensation) and gain (amplification) of the digital signal.
Manufacturer scaling active (default setting)
 Default values for manufacturer scaling:
– Offset (b
1
): 0
– Gain (a
1
): 32
D
(20
H
)
The digital value after manufacturer scaling is calculated using the
following formula:
 y = (a
1
/ 256
D
* x) + b
1
or
 y = (a
1
/ 100
H
* x) + b
1
Key:
 y: Digital value after manufacturer scaling
 x: Digital value before manufacturer scaling
 a
1
: Gain
 b
1
: Offset
 a
1
/ 256
D
: Amplification factor
INFORMATION
The default setting for gain (a
1
) means an amplification factor of
0.125 (1/8).