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9. Appendices
Digitax SF Instruction Manual
Appendices 4. Status Display
4. Status Display
Status
Speed Feedback
Units Bytes Signed
Status No.
（Hexadecimal number）
98 （62）
rpm
2 yes
Description
Indicates the speed value returned from the encoder to the drive. With
this, you can check command response and motor rotational speed.
Transmit data
24 01 00 10 00 62 98 6F
Status
Speed Error
Units Bytes Signed
Status No.
（Hexadecimal number）
99 （63）
rpm
2 yes
Description
Error between the speed command and the speed feedback.
This item is used in Velocity Control Mode. With this, you can check the error during
acceleration/deceleration, and adjust gains so that the value becomes within the desired
range for the equipment.
If the speed error is too large, make the adjustment with Control Gain 1 first, then Integral
Gain next.
This item is a reference value In Position Control Mode
Transmit data
24 01 00 10 00 63 88 4E
Status
Torque Command Value
Units Bytes Signed
Status No.
（Hexadecimal number）
113 （71）
0.1 ％ 2 yes
Description
Indicates the value of torque command. The value of 1,000 equals to the rated torque.
You can check the torque range during acceleration time and compare to the rated torque
and the instantaneous maximum torque.
・RMS torque: Keep this below the rated torque.
・Instantaneous torque: Use the motor such that this will be approximately 80 % of instantaneous
peak torque.
When the RMS torque command value reaches the instantaneous max torque value (that
is, torque saturation), the torque output will be limited and an alarm will occur after the
predetermined time will have elapsed.
Torque saturation causes slow response. Take countermeasures.
For example,
① Set Position command lter.
・Filter 1 (Smoothing lter 1) Moving average counter (80.0)
・Filter 4 (Smoothing lter 2) Moving average counter (81.0)
② Smooth acceleration/deceleration of the command output from the host controller.
③ Install a speed reducer to decrease the inertia ratio.
④
Select a new motor to increase the rotor inertia or increase the capacity to decrease
the inertia ratio.
Transmit data
24 01 00 10 00 71 BA 3D
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