Section 80
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2018-02-26
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17 -
4.1.3 Output Modes
Two slave modes of operation are possible where the PDM is configured and controlled by a
PowerView display or some other CAN bus controller.
1.
High-Side Switch
(
HSS
): This mode of operation is the typical standard output to turn a
load on or off. The individual outputs can switch up to 15 A loads. This mode also
supports PWM to drive a load proportionally (open-loop).
2.
H-Bridge (HB):
This mode allows two adjacent outputs to switch polarity of the voltage
applied to the load. This is often used to change direction of a DC motor and run it in
reverse. This mode supports PWM to drive a load proportionally.
4.1.4 Special Methods of Operation
The PDM is a flexible power I/O module and offers the following configurable features:
4.1.4.1 Power on Reset (POR)
This mechanism enables the PDM to retain an output state through power cycles of the unit.
The PDM can power up with individual outputs at predefined PWM levels.
4.1.4.2 Local Source Control
Local Source Control (LSC) is a mode that enables any digital input to trigger the
respective output. The effect of this mode is to allow any number of outputs to be
autonomously commanded by the specified input.
It is possible to use the PDM in stand-alone operation using LSC. Once the PDM has
been configured on the production line, the unit can operate autonomously.
An example use of this function is connecting a key switch to a digital input on the PDM
to power an output, which in turn energizes the remainder of the electronic modules that
are driven by the key switch.
Using this feature inhibits the other output modes of operation such as the PWM values
on the specific outputs configured for LSC mode.
IMPORTANT: Configuring LSC mode on an output disables the Loss
of Communication function for the respective output since there is
no way of knowing if CAN communication is expected or not.
Содержание Xpansion IX3212
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