Nova Electronics MCX514, User Manual

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NOVA electronics Inc. MCX514 -
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Table 2.1-3 Setting Parameters
：
Continuous Pulse Driving
Parameter Symbol Comment
Acceleration / Deceleration AC
／
DC
No need to set deceleration when acceleration and
deceleration are equal.
Initial speed SV
Drive speed DV
■
Changing Drive Speed during the Driving (Override)
The drive speed can be changed freely during continuous pulse driving, which can be altered by changing a drive speed parameter
(DV) or issuing a speed increase/decrease command.
In S-curve acceleration / deceleration driving, it will be invalid if the speed is changed in the middle of acceleration / deceleration.
In fixed pulse driving under the symmetry trapezoidal acceleration/deceleration and constant speed, a drive speed (DV) can be
changed during the driving. However, if a speed of fixed pulse driving is changed at linear acceleration / deceleration, some
premature termination may occur. So please note when using the IC with low initial speed.
In fixed pulse driving (automatic deceleration mode) under the non-symmetry trapezoidal acceleration/deceleration and S-curve
acceleration / deceleration, the drive speed cannot be changed during the driving.
＜
Speed Change by Drive Speed Setting
＞
If a drive speed parameter (DV) is changed by drive speed setting command (05h), the setting will be immediately applied.
And if during acceleration / deceleration driving, the drive speed increases / decreases to a specified drive speed.
15k
25k
30k
40k
DV:40,000 setting
DV:30,000 setting
DV:15,000 setting
Speed (pps)
time
Fig. 2.1-11 Example of Drive Speed Change during the Driving
＜
Speed Change by Speed Increase / Decrease Command
＞
The speed increasing /decreasing value (IV) must be set in advance. If speed increase command (70h) or speed decrease command
(71h) is written during the driving, the setting will be immediately applied. And if during acceleration / deceleration driving, the
drive speed increases / decreases from the current drive speed to the value of the speed increasing / decreasing value setting.
10k
20k
30k
40k
Speed Increase
Speed increasing / decreasing value (IV)=10,000
Speed Decrease
Speed Increase Speed Decrease
Speed Decrease
Speed (pps)
time
Fig. 2.1-12 Example of Speed Change by Speed Increase / Decrease Command
[Note]
•
When changing a drive speed during the driving, set the triangle form prevention function to disable (WR3
／
D13 : 1).
■
Stop Condition for External Input nSTOP2 to nSTOP0 in Continuous Pulse Driving
Assign a near home signal, a home signal and an encoder Z-phase signal in nSTOP0 to nSTOP2. (Assign an encoder Z phase
signal in nSTOP2.) Enable / disable and logical levels can be set by WR2 register. If high-speed searching, continuous pulse
driving is performed at acceleration / deceleration. And when the signal that is enabled becomes active, MCX514 will perform