Specifications

II Parameters
Servo Parameters
II - 141
【#2250】 SV050 PGN2sp Position loop gain 2 in spindle synchronous control
When using SHG control during spindle synchronous control (synchronous tapping and
synchronization control with spindle C-axis), set this parameter with SV049 (PGN1sp) and
SV058 (SHGCsp).
Make sure to set the value 8/3 times that of SV049.
When not using the SHG control, set to "0".
---Setting range---
0 to 999 (rad/s)
【#2251】 SV051 DFBT Dual feedback control time constant
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 Dual feedback control non-sensitive band
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 Excessive error detection width in special control
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 Overrun detection width in closed loop control
Set the overrun detection width in the full-closed loop control.
When the gap between the motor side detector and the linear scale (machine side detector)
exceeds the value 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 detector and the machine
side detector 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 Max. gate off delay time after emergency stop
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)
【#2256】 SV056 EMGt Deceleration time constant at emergency stop
Set the time constant used for the deceleration control at emergency stop.
Set the time required to stop from rapid traverse rate (rapid).
The standard setting value is EMGt≤G0tL×0.9.
However, note that the standard setting value differs from the above-mentioned value when
the setting value of "#2003:smgst Acceleration and deceleration modes bit 3-0:Rapid
traverse acceleration/deceleration type" is 8 or F. Refer to Instruction Manual of the drive
unit (section "Deceleration Control") for details.
Related parameters: SV048, SV055
---Setting range---
0 to 20000 (ms)