Mitsubishi Electric MDS-E Series Instruction Manual page 180

MDS-E/EH Series Instruction Manual
4 Setup
#2251 SV051 DFBT
Set the control time constant in dual feed back.
When "0" is set, it operates at 1ms.
The higher the time constant is, the closer it gets to the semi-closed control, so the limit of the position loop
gain will be raised.
For linear servo/direct-drive motor system
Not used. Set to "0".
Related parameters: SV017/bit1, SV052
---Setting range---
0 to 9999 (ms)
#2252 SV052 DFBN
Set the non-sensitive band in the dual feedback control.
Normally, set to "0".
For linear servo/direct-drive motor system
Not used. Set to "0".
Related parameters: SV017/bit1, SV052
---Setting range---
0 to 9999 (μm)
#2253 SV053 OD3
Set the excessive error detection width when servo ON in a special control (initial absolute position setting,
stopper control and etc.).
When "0" is set, excessive error detection will not be performed when servo ON during a special control.
---Setting range---
0 to 32767 (mm)
However, when SV084/bitC=1, the setting range is from 0 to 32767 (μm).
#2254 SV054 ORE
Set the overrun detection width in the full-closed loop control.
When the gap between the motor side encoder and the linear scale (machine side encoder) exceeds the val-
ue set by this parameter, it will be judged as overrun and "Alarm 43" will be detected.
When "-1" is set, if the differential velocity between the motor side encoder and the machine side encoder
exceeds the 30% of the maximum motor speed, it will be judged as overrun and "Alarm 43" will be detected.
When "0" is set, overrun will be detected with a 2mm width.
For linear servo/direct-drive motor system
Not used. Set to "0".
---Setting range---
-1 to 32767 (mm)
However, when SV084/bitD=1, the setting range is from -1 to 32767 (μm).
#2255 SV055 EMGx
Set the time required between an emergency stop and forced READY OFF.
Set the maximum value "+ 100ms" of the SV056 setting value of the servo drive unit electrified by the same
power supply unit.
When executing the vertical axis drop prevention, the gate off will be delayed for the length of time set at
SV048 even when SV055's is smaller than that of SV048.
Related parameters: SV048, SV056
---Setting range---
0 to 20000 (ms)
Dual feedback control time constant
Dual feedback control non-sensitive band
Excessive error detection width in special control
Overrun detection width in closed loop control
Max. gate off delay time after emergency stop
149 IB-1501229-F