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For information on settings of speed/voltage commanding place selection, refer to the sections of the
command input when coupled (b-09) and speed/armature voltage command input selection (b-10).
・
When the speed/armature voltage command input selection is set to analog input (1) (b-10 = 1)
This section describes speed/voltage commanding characteristics when the speed/armature voltage
command input selection (b-10) is set to analog input (1).
1.
When the analog input (1) characteristics selection is
0 to ±10 V input (b-17 = 0)
When the analog input (1) characteristics selection is 0 to ±10 V input (b-17 = 0), you can perform the
reverse rotation/negative voltage output by giving a negative commanding voltage. (Incidentally, when
operating with a reverse rotation operation command, a positive voltage performs the reverse
rotation/negative voltage output and a negative voltage performs the forward rotation/positive voltage
output.) When +10 V is input, the characteristics are the setting of the analog input (1) speed/voltage
upper limit (b-18). When -10 V is input, the characteristics are the additive inverse of the setting of the
analog input (1) speed/voltage upper limit (b-18). However, the negative value is limited to the setting of
the analog input (1) speed/voltage lower limit (b-19). (Because of this, to use the lowest negative value,
you need to set -100% to the analog input (1) speed/voltage lower limit (b-19).)
Incidentally, when the operation mode selection is speed control mode (i-07 = 0) and the minimum speed
(A-01) is not 0, the value is limited so that its absolute value is not below this speed. In such a case, the
characteristics around 0 V become hysteresis characteristics as shown in Figure 1-2. (Upon start, the
minimum speed is of the forward rotation when started with the Forward operation and of the reverse
rotation when started with the reverse rotation operation.)
Input voltage
+10 V
-10 V
Speed/voltage command
b-18
b-19
0
b-18 x (-1)
Figure 1-1 When 0 to
±
10 V is selected
Speed command
A-01
A-01 x (-1)
Input voltage
Figure 1-2 Hysteresis characteristics of minimum
speed (A-01) around 0 V
