Commands For Analogue Signals - Festo EasyPort USB Manual De Instrucciones

9. EasyPort USB command interpreter
9.6
Commands for
analogue signals
Analogue-to-digital assignment for the 0...10 V range
Analogue-to-digital assignment for the ‟10...+10 V range
© Festo Didactic GmbH & Co. KG „ 721876
In addition to digital input and output signals, EasyPort USB also
processes analogue signals.
The command interpreter therefore includes commands for:
Reading in analogue input and output channels
Reading out voltage to an analogue channel
Analogue-digital conversion takes place at a resolution of 12 bits. 12 bit
resolution corresponds to a matrix with 4096 steps.
The sampling frequency for analogue inputs and outputs is 0.5 kHz.
One of two different voltage ranges can be selected for the analogue
channels:
0...10 V
‟10...+10 V
The two figures show how the analogue voltage range is assigned to the
digital numeric range. The digital numeric range is always a range of
0x0000 to 0x7FFF (32767 decimal).
0 V
0x0000
-10 V
0x0000
5 V
0x3FFF 0x7FFF
0 V
0x3FFF 0x 7FFF
10 V
+10 V
145