PC104 View Datasheet(PDF) - PMD
Part Name
Description
MFG CO.
'PC104' PDF : 70 Pages View PDF
Operation
2
2.3.7 Reset
Although a reset occurs automatically during power up, it is sometimes desirable to reset the motion
processor explicitly, through a user-initiated command or action.
There are several methods by which you can explicitly reset the motion processor. They are summa-
rized in the table below:
Method
External reset
Type of reset
Hard reset
Reset through
Soft reset
motion processor
Reset through
PC/104 bus
Hard reset
Description
When external signal Reset on J7 is brought low, a reset occurs.
Normally this signal is pulled high by the card. This type of reset
is a ‘hard’ reset, which resets both the card circuitry and the
motion processor. See table below for more information.
The C-Motion command PMDReset sends the command Reset
to the motion processor, which causes a ‘soft’ reset of the
motion processor only. See table below for more information.
The C-Motion command PMDHardReset uses the PC/104 bus
to perform a ‘hard’ reset of both the card circuitry and the
motion processor. See table below for more information.
After a reset occurs, the motion processor and other related output signals will be driven to known
states, depending on the type of reset performed. These are summarized in the table below:
Signal name
AxisOut1-4
PWMMag1A-4C
PWMSign1A-4B
DAC1A-DAC4B
DigitalOut0-7
AmpEnable1-4
Dac On/Off
Soft reset
High
For DC-brush or
mixed motor cards: low
For brushless-DC cards:
50/50 high/low
For microstepping cards:
low
Low
0.0 volts
No change
No change
No change
Hard reset
High
For DC-brush or
mixed motor cards: low
For brushless-DC cards:
50/50 high/low
For microstepping cards:
low
Low
0.0 volts
Low
Low
Off
C-Motion commands
The available C-Motion callable functions for this feature are:
C-Motion
command
PMDHardReset
Arguments
axis_handle
Function description
This function causes a ‘hard’ reset of the
motion processor. Unlike all other card-specific
commands, this command is processed directly
through the PC/104 card interface.
Connections & associated signals
The reset feature has an external signal input, Reset, associated with it.
Navigator-PC/104 User’s Guide
29
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