Siemens SIMATIC ET 200AL, System Manual

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Analog output module AQ 4xU/I 4xM12 (6ES7145-5ND00-0BA0)
Equipment Manual, 08/2021, A5E38687953-AC
33
Representation of analog values
B
This appendix shows the analog values for all output ranges supported by the
AQ 4xU/I 4xM12 analog output module.
Measured value resolution
The digitized analog value is the same for all output values at the same nominal range.
Analog values are output as fixed point numbers in two's complement.
Table B- 1 Resolution of the analog values
Resolution in bits
including sign
Values Analog value
Decimal Hexadecimal High byte Low byte
16 1 1
H
Sign 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
B.1 Representation of analog values in the voltage output ranges
The tables below list the decimal and hexadecimal values (codes) of the possible voltage
output ranges.
Table B- 2 Voltage output range +/-10 V
Values Voltage output
range
Range
Dec. Hex. ±10 V
118.5149% 32767 7FFF 11.76 V Maximum output value
32512 7F00
117.589% 32511 7EFF 11.76 V Overrange
27649 6C01
100% 27648 6C00 10 V Nominal range
75% 20736 5100 7.5 V
0.003617% 1 1 361.7 µV
0% 0 0 0 V
-1 FFFF -361.7 µV
-75% -20736 AF00 -7.5 V
-100% -27648 9400 -10 V
-27649 93FF Underrange
-117.593% -32512 8100 -11.76 V
-32513 80FF -11.76 Minimum output value
-118.519% -32768 8000