MC3PHAC/D
Operation
MOTOROLA
3-Phase AC Motor Controller
29
Fault timeout
$006A
R/W
2
Specifies the delay time after a fault
condition before re-enabling the
motor.
Fault timeout = value * 0.262 sec
$0000–$FFFF
Fault timer
$006D
R
2
Real-time display of the fault timer
Elapsed fault time = value * 0.262 sec
$0000–$FFFF
V
Bus
decel value
(10)
$00C9
R/W
2
V
Bus
readings above this value result
in reduced deceleration.
$0000–$03FF
V
Bus
RBRAKE
value
(10)
$0064
R/W
2
V
Bus
readings above this value result
in the RBRAKE pin being asserted.
$0000–$03FF
V
Bus
brownout
value
(10)
$0066
R/W
2
V
Bus
readings below this value result in
an under voltage fault.
$0000–$03FF
V
Bus
over voltage
value
(10)
$0068
R/W
2
V
Bus
readings above this value result
in an over voltage fault.
$0000–$03FF
Speed in ADC
value
(5)
$0095
R
2
Left justified 10-bit ADC reading of the
SPEED input pin.
$0000–$FFC0
Setup
(7)
$00AE
R
1
Bit field indicating which setup
parameters have been initialized
before motion is permitted
$E0–$FF
Switch in
(7)
$0001
R
1
Bit field indicating the current state of
the start/stop and forward/reverse
switches
$00–$FF
Reset status
(6),
(7)
$FE01
R
1
Indicates cause of the last reset
$00–$FF
Version
$EE00
R
4
MC3PHAC version
ASCII field
1. The commanded PWM frequency cannot be written until the PWM outputs exit the high-impedance state. The default PWM
frequency is 15.873 kHz.
2. The PWM output pins remain in a high-impedance state until this parameter is specified.
3. This parameter must be specified before motor motion can be initiated by the MC3PHAC.
4. This is a write-once parameter. The first write to this address will execute normally. Further attempts at writing this
parameter will result in an illegal operation response from the MC3PHAC.
5. The value of this parameter is not valid until the PWM outputs exit the high-impedance state.
6. The data in this field is only valid for one read. Further reads will return a value of $00.
7. See register bit descriptions following this table.
8. Acceleration is an unsigned value with the upper seven bits range of $00 to $7F = acceleration value of 0 to
127 Hertz/second. The lower nine bits constitute the fractional portion of the acceleration parameter. Its range is $000 to
$1FF which equals 0 to ~1. Therefore, the range of acceleration is 0 to 127.99 Hertz/second.
9. Commanded motor frequency and actual frequency are signed values with the upper byte range of
$00 to $7F = frequency of 0 to 127 Hz. The lower byte is the fractional portion of the frequency. Its range is $00 to $FF
which equals 0 to ~1.
10. V
Bus
is the voltage value applied to the DC_BUS analog input pin. The analog-to-digital converter is a 10-bit converter with
a 5 volt full scale input. The value is equal to the voltage applied to the DC_BUS input pin/V
REF
* $03FF.
Table 6. User Interface Variables for Use with PC Master Software (Continued)
Name
Address
Read/
Write
Size
(Bytes)
Description
Valid Data
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
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