LIN Frames and Signals
Designer Reference Manual
DRM047 — Rev 0
98
LIN Frames and Signals
MOTOROLA
Table C-1. LIN Leveller Messaging
Signal
Provi
der
Signal
Accep
tor(s)/
Axis
Frame Name
(ID)
Signal Name
Signal Functionality Description
Raw
Value
Range
Normalized
Value
Range
Master
A1_1
A1_2
fr
mP
osCmdA1
(0x20)
l_u16_rd_positionReqA1
Required absolute Position. The LIN
Stepper Controller acceptor provides
automatic control of the actual
position to this value
<0xC000,
0x3FFF>
<-16384,
16383>
l_u8_rd_frequencyReqA1
Required Frequency. The LIN Stepper
Controller acceptor provides
automatic position control with motor
actual stepping frequency trying to
ramp up (or down) to the Required
Frequency.
x =
<0x00,
0xFF>
f(x) =
RESOLU
TION_FR
EQUENC
Y_HZ *x
[Hz]
l_bool_rd_flagClrA1
Clear Error Flag. The LIN Stepper
Controller acceptor provides all
system error clear
0 False
1 True
l_bool_rd_AppInitFlagA1
Application Initialization Flag. The LIN
Stepper Controller acceptor puts all
processes to the application
initialization state. The actual
position is not initialized in this state.
For details see
Caution: The application init. state is
unconditionally entered even if the
motor is not stopped. This can cause
the actual position to be lost.
0 False
1 True
l_bool_rd_PosResetFlagA1
Position Reset Flag. The LIN Stepper
Controller acceptor provides motor
position reset.
This position reset is described below:
- software controls the motor
stepping to the
positionResetRqValue.
- mechanical stall keeps the motor at
defined position (even the electrical
stepping is in progress)
- after actual position counter
reaches the positionResetRqValue,
the software sets the counter to
positionStall
For details see
Note: There can be other requirements
to control the motor to a reset
position, e.g. using stall detection or
Hall sensor. These were not used in
current software but can be easily
implemented on LIN Stepper
Controller
0
1
0-False
1-True
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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