Siemens SINUMERIK ONE NCU 1740 Equipment Manual page 136

Connectable components
12.2 PP 72/48D PN and PP 72/48D 2/2A PN
Analog outputs
The module has two analog outputs. These can optionally be assigned parameters as voltage or
current output.
• "Voltage output" operating mode:
• "Current output" operating mode:
Note
The analog outputs are only enabled after the parameter assignment.
From the switch-on of the I/O module to when it is enabled, the analog outputs do not read 0 V,
but are defined by a voltage pulse at -0.2 V. This value must be taken into consideration when
specifying the setpoint.
The cycle time of the analog value generation is limited by the PLC cycle.
Analog value representation
Note
The analog values of the inputs and outputs are written or read in 16-bit data format, i.e. they
must be accessed word by word.
The analog values are provided as 16-bit integer values. Depending on the operating mode, the
measured values must be converted using the following factors in order to achieve the
corresponding physical value.
Factor (AI):
Factor (AO):
Calculation: 16-bit value (hex. or dec.) * factor = measured value
136
Parameter
Output range (rated value)
Permissible range overstepping
Resolution
Accuracy
Max. load current
Parameter
Output range (rated value)
Permissible range overstepping
Resolution
Accuracy
Load impedance
Voltage [V]
0.00152
0.00038
Value
- 10 V to + 10 V
- 10.5 V to + 10.5 V
16-bit (incl. sign)
+/-0.5%
-3 mA to +3 mA
Value
- 20 mA to + 20 mA
- 20.2 mA to + 20.2 mA
16-bit (incl. sign)
+/-0.5%
≤ 600 ohm
Current [mA]
0.00305
0.00076
Equipment Manual, 09/2022, A5E51087503B AC
Temperature [°C]
0.1
-
NCU 1740