maxon motor
8
maxon motor control
1-Q-EC Amplifier DEC Module 50/5
Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
5.1.2 Set value «Set value speed»
The external analogue set value is predetermined at the «Set value speed»
input [26]. The «Set value speed» input sets the rotational speed of the motor
shaft.
By adjusting the signal levels on digital inputs «DigIN1 [20]» and
«DigIN2 [21]» the speed range must be set in advance.
Motor type
DigIN1 DigIN2
1 pole pair
4 pole pair
8 pole pair
0
0
Open loop speed control, 0...95 % PWM
depending on the «Set value speed» input voltage
1
0
500...5 000 rpm
125...1 250 rpm
62...625 rpm
0
1
500...20 000 rpm
125...5 000 rpm
62...2 500 rpm
1
1
500...80 000 rpm
125...20 000 rpm
62...10 000 rpm
Note
Ö
If the signal level of the digital inputs DigIN1 [
20
] and DigIN2 [
21
] are
changed, the new levels are adopted by a disable-enable procedure.
Set value voltage
Description
0 V ... 0.1 V
Operation at minimum speed
0.1 V ... 5.0 V
Linear speed adjustment
The actual speed value is calculated according the following formula:
Known values
Ö
Minimum speed (see table above) n
min
[rpm]
Ö
Maximum speed (see table above) n
max
[rpm]
Ö
Set value voltage V
set
[V] respectively speed n [rpm]
Sought value
Ö
speed n [rpm]
Sought value
Ö
Set value voltage V
set
[V]
Solution
> @
> @
min
min
max
9
.
4
1
.
0
n
n
n
V
V
V
n
set
»
¼
º
«
¬
ª
Solution
> @
> @
V
V
n
n
n
n
V
set
1
.
0
9
.
4
min
max
min
¸¸
¹
·
¨¨
©
§
The «Set value speed» input is protected against overvoltage.
Set value speed input
Pin number [26] «Set value speed»
Input voltage range
0 ... +5 V (referenced to Gnd)
Resolution
1024 steps (4.88 mV)
Input impedance
107 k
Ω
(in range 0 ... +5 V)
Continuous overvoltage protection
-55 ... +55 V
a
The change rate of the set value signal is limited internally with a ramp
function. It nominally takes 1 s to reach the maximum speed for the
selected speed range. This time can be shortened proportionally by
defining smaller set value increments.
