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MDS-D-SVJ3/SPJ3 Series Instruction Manual
4-7 Protective functions
4-7-2 Excessive error detection
An excessive error (alarms 52, 53, 54) is detected when the difference between the servo's commanded
position and the FB position exceeds the value set by parameter. Separate excessive error detection width
can be set for servo ON (SV023) and servo OFF (SV026) statuses. When a wider excessive error detection
width than that used for standard control is required in stopper control, etc., the detection width setting can
be changed to the SV053 setting value by NC command.
Follow-up control (NC commanded position tracks servo FB position) is used during emergency stop and
during a servo OFF command, and so there is no excessive error detection at those times, although the
follow-up control during a servo OFF status can be disabled by an NC system parameter setting.
【#2223】 SV023 OD1 Excessive error detection width during servo ON
Set the excessive error detection width in servo ON.
<Standard setting value>
OD1=OD2= (Rapid traverse rate [mm/min]) / (60×PGN1) / 2 [mm]
When set to "0", the excessive error alarm detection will be ignored.
---Setting range---
0 to 32767 (mm)
【#2226】 SV026 OD2 Excessive error detection width during servo OFF
Set the excessive error detection width during servo OFF.
<Standard setting value>
OD1=OD2= (Rapid traverse rate [mm/min]) / (60×PGN1) / 2 [mm]
When set to "0", the excessive error alarm detention will be ignored.
---Setting range---
0 to 32767 (mm)
【#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)