Digital/Analog Converter3; Rated Outputrangeand Resolution; Writingtheanalog Output; Digital Representation Ofanalog Values - Siemens SIMATIC S5 1P 243 Equipment Manual

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3.4.3. Digital/Analog Converter 3
3.4.3.1 Rated Output Range and Resolution
The digital/analog converter DAC3 has an 8–bit resolution. Unipolar analog values in the range O
V to +10 V can be output. The analog output amplifier should be added on the output side
of DAC3 to amplify the analog output signal, as output current from DAC3 is too low to carry a load.
3.4.3.2 Writing the Analog Output
need to be transferred to the output.
3.4.3.3 Digital Representation of Analog Values
The digital value to be converted to an analog voltage has a 1–byte format:
D7
2
Module address +4
The value to be output is represented as an amount (without
Units
255
200
100
1
0
Attention: When the power supply of the programmable controller is initially turned
on, or when the voltage returns after
assume anv value which remains until it is overwritten.
7 6 5 4
2 2 2 2
Output voltage
9.961
7.812
3.906
0.039
0
DO
3 2
2 2' 2 °
in the following bit pattern:
sign)
Byte
2
272 5 232
2
1 1 1 1 1 1 1 1
1 1 0 0 1 0 0 0
0 1 1 0 0 1 0 0
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
power–off,
Function Description
0
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