UMAX030211 Version 1.0.2. Preliminary Documentation – May be subject to change
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The value of 2102h will depend on the
AI Sensor Type
and
Pulses per Revolution
selected and
will be automatically updated per Table 7 when either 6110h or 2101h are changed. All other objects
associated with the input field value also apply this object. These objects are 7120h
AI Scaling 1
FV
, 7122h
AI Scaling 2 FV
, 7148h AI
Span Start
, 7149h
AI Span End
, and 2111h
AI Error Clear
Hysteresis
. These objects are also automatically updated when the Type or Pulses per Rev are
changed.
Sensor Type
Decimal Digits
Voltage: All Ranges
3 [mV]
Current: All Ranges
3 [uA]
Frequency: 0.5Hz to 50Hz
2 [0.01 Hz]
Frequency: 10Hz to 1kHz
1 [0.1 Hz]
Frequency: 100Hz to 10kHz
0 [Hz]
Frequency: RPM Mode
1 [0.1 RPM]
Resistive
0 [1 kΩ]
PWM: All Ranges
1 [0.1 %]
Digital Input
0 [On/Off]
Table 6 – Object 2102h AI Decimal Digits FV Depending on Sensor Type
It is the
AI Input FV
which is used by the application for error detection, and as a control signal for
other logic blocks (i.e. output control.) Object 7100h is mappable to a TPDO and is mapped to
TPDO1 by default.
Read-only object 7130h
AI Input Process Value
is also mappable. However, the default values for
objects 7121h
AI Scaling 1 PV
and 7123h
AI Scaling 2 PV
are set to equal 7120h and 7122h
respectively, while object 6132h
AI Decimal Digits PV
is automatically initialize to equal 2102h. This
means that the default relationship between the FV and PV is one-to-one, so object 7130h is not
mapped to a TPDO by default.
Should a different linear relationship between what is measured versus what is sent to the CANopen
bus be desired, objects 6132h, 7121h and 7123h can be changed. The linear relationship profile is
shown in Figure 7 below. Should a non-linear response be desired, the lookup table function block
can be used instead, as described in Section 2.3.
Figure 4 – Analog Input Linear Scaling FV to PV
As stated earlier, the FV scaling objects are automatically updated with the Sensor Type or Range
changes. This is because objects 7120h and 7122h are not only used in a linear conversion from FV
