Speed Mode; Selecting The Speed Command Source - Delta ASDA-B3 Series User Manual

ASDA-B3

6.3 Speed mode

There are two kinds of command sources: analog input and internal register (parameters).
The analog command controls the motor speed by scaled external voltage input. The command
register input controls the speed in two ways. Before operation, respectively set the speed
values in three registers. You can switch among the three sets of speed either by using
DI.SPD0 / DI.SPD1 of CN1 or change the value in the register through communication. In order
to deal with the problem of non-continuous speed when switching registers, you can use the
S-curve acceleration and deceleration filter.

6.3.1 Selecting the Speed command source

There are two types of Speed command sources: analog voltage and internal register
(parameters). Select the command source with DI signals of CN1. See the following table for
more details.
Speed
CN1 DI signal
command
SPD1
number
S1 0
S2 0
S3 1
S4 1
 Status of SPD0 and SPD1: 0 means that DI is off (the circuit is open); 1 means that DI is
on (the circuit is closed).
 When both SPD0 and SPD1 are 0, if it is in Sz mode, the command is 0. Thus, if the
Speed command using analog voltage is not required, you can use Sz mode to address
the problem of zero drift in the voltage. If it is in S mode, the command is the voltage
difference between V_REF and GND. The range of the input voltage is between -10V and
+10V, and you can adjust the corresponding speed (P1.040).
 When either one of SPD0 and SPD1 is not 0, the Speed command comes from the
internal register. The command is activated once the status of SPD0 and SPD1 are
switched. There is no need to use DI.CTRG for triggering.
 The parameter setting range (internal register) is -60000 to 60000.
Rotation speed = setting value x unit (0.1 rpm). For example, if P1.009 = +30000, then
rotation speed = +30000 x 0.1 rpm = +3000 rpm
Use the Speed command in Speed mode (S or Sz) and in Torque mode (T or Tz) to set the
speed limit.
Command source
SPD0
External analog
S
0 Mode
Sz
1
0 Register parameter
1
Content
Voltage difference
between V_REF and
signal
GND
N/A Speed command is 0
P1.009
P1.010
P1.011
Operation Mode
Range
-10V to +10V
0
-60000 to 60000
-60000 to 60000
-60000 to 60000
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