
31
Additional Modes
PI-Speed
Controller
MOSFET
Power
Amplifier
EC-Motor
Armature
Position
Calculation
Phase A
Phase B
Phase C
Hall Sensor A
Hall Sensor B
Hall Sensor C
Speed
Calculation
I
2
t - Current
Limiting
R
S
GND
V7
Microcontroller
RS-232
Communication
and Configurations
Module
+ 24V DC
V6
U
B
PC TXD
PC RXD
GND
n
act
V2
V1
RXD
TXD
I
act
Position
Controller
RS-232
Interface
3 Phase
PWM
Sine Wave
Commutator
ϕ
h
(t)
n
com
∆ϕ
U
a
Protection:
Current Limit
Overtemperature
Overvoltage
Undervoltage
5V- Regulator
VCC
Signal GND
Evaluation
Input 3
Input 3
V8
M8
M7
M1
M2
M5
M6
M3
M4
brown
orange
yellow
green
blue
grey
red
black
+5V
V4
Fault
Output
V5
V3
Position
Calculation
10k
E
xam
ple:
Lim
it S
w
itch
REFIN
Evaluation
Limit Switch
Analog
Input
AGND
Encoder
VDD
ChA
ChB
2,7k
2,7k
Command
Position
ϕ
e
(t)
Diagram 11: External encoder a position and speed signal source
Command Function
Description
Example
ENCMOD*)
Encoder
Switches to encoder mode.
ENCMOD
Mode
Position is registered by an
external encoder.
HALLSPEED*) Hall Sensor as Speed registered by the
HALLSPEED
Speed Sensor Hall Sensors.
ENCSPEED*) Encoder as
Speed registered with an
ENCSPEED
Speed Sensor encoder signal
ENCRES*)
Load Encoder Loads the encoder resolution
ENCRES
Resolution
to the motor. From 0 to 65535
2048
(4 x Pulses/Revolution)
GENCRES
Get Encoder Calls up current encoder resolution.GENCRES
Resolution
➔
2048
Default Setting: ENCRES2048
Important:
Because four edges are measured for every pulse, the pulse
number programmed with the ENCRES command must be
multiplied by four. That means, for example, that an encoder
with a resolution of 1024 pulses translates to 4096 “steps” per
revolution and maximum resolution can be given with the
command, ENCRES4096.
The maximum position, which
is set with the LL command,
can range
from 0 to +2,000,000,000
and in the negative,
0 to –2,000,000,000.
Input:
Maximum Input Frequency:
150 kHz
Level: low 0 ... 0.5 V /
high 4 ... 30 V
Summary of Contents for MCDC2805 series
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