X90 mobile modules
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X90 mobile system User's manual V 1.20 - Translation of the original manual
5.2.1.12.11 Current measurement
The module has the ability to measure the currents supplied by the outputs in 3 different ways.
•
Current value
•
Root mean square (RMS)
•
Arithmetic mean value
These currents can be measured when wired as a digital output as well as in configuration "PWM".
Note:
In operating mode "PWM", it makes sense to set the measured period for current measurement as a
whole-number multiple of the PWM period duration in order to avoid beat effects.
5.2.1.12.11.1 Measured current
Name:
Current25 to Current32
These registers contain the analog current measured value of the MF DO power outputs.
Resolution: 12-bit, 1 LSB of the INT value corresponds to 610 µA.
Data type
Values
Information
INT
-32768 to 32767
Measured current
Name:
Current33 to Current48
These registers contain the analog current measured value of the MF PWM power outputs.
Resolution: 12-bit, 1 LSB of the INT value corresponds to 305 µA.
Data type
Values
Information
INT
-32768 to 32767
Measured current
5.2.1.12.11.2 Current measurement configuration
Name:
cfgLoadType25 to cfgLoadType32
cfgLoadType33 to cfgLoadType48
cfgLoadTime25 to cfgLoadTime32
cfgLoadTime33 to cfgLoadTime48
Configuration of the measurement type
Data type
Values
Information
0
Current value
1
Root mean square (RMS)
2
Arithmetic mean value
USINT
3 to 255
Reserved
Configuration of the measured period
The configured value specifies how far back the last current value taken into account for the calculation goes.
Data type
Values
Information
UDINT
1000 to 2,000,000
Measurement range in µs
