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5 Servo Adjustment
MITSUBISHI CNC
5.6.2 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, so do not set to "0".
---Setting range---
0 to 32767 (mm)
However, when SV084/bitC=1, the setting range is from 0 to 32767 (μm).
【#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, so do not set to "0".
---Setting range---
0 to 32767 (mm)
However, when SV084/bitC=1, the setting range is from 0 to 32767 (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).