Nidec Control Techniques Digitax-SF DA21223, Instruction Manual

Page: 377 / 386

24
9. Appendices
Digitax SF
Instruction Manual
4. Status Display
Status
Absolute Position Feedback
Units Bytes Signed
Status No.
（Hexadecimal number）
76 （4C）
command pulse 4 yes
Description Indicates the absolute position data returned from the encoder to the
drive
.
Transmit data
24 01 00 11 00 4C 6A F3
Status
Command Position
Error
Units Bytes Signed
Status No.
（Hexadecimal number）
78 （4E）
command pulse 4 yes
Description Indicates the
Error
between a position command value and the feed back position value.
Transmit data
24 01 00 11 00 4E 4A B1
Status
ABS Position
Error
Units Bytes Signed
Status No.
（Hexadecimal number）
80 （50）
command pulse 4 yes
Description
Indicates the
Error
between a value of ABS Position Command (Status No.74) and
the value of ABS Positioning Feedback (Status No.76).
Transmit data
24 01 00 10 00 50 B9 4E
Status
Speed Command Value
Units Bytes Signed
Status No.
（Hexadecimal number）
97 （61）
rpm
2 yes
Description
Indicates the command value being input from the position loop (in Position Control mode)
or analog speed command (in Analog Speed Control mode) to the speed loop.
While tuning, by measuring this value (waveform data displayed in
Digitax SF Connect
)
and position
error
(or speed
error
) at the same time, you can check command
response with positioning time and vibration.
Verify that no commands with extremely short acceleration/deceleration time are input
from the host controller.
If a command
'
s acceleration/deceleration time is too short, the motor will be unable to
keep up and vibration will easily occur.
If you want to set a short acceleration/deceleration time, use a position command smoothing filter.
Transmit data
24 01 00 10 00 61 A8 0C