8.7 Autotuning with a Host Reference
8.7.2 Restrictions
8-35
8.7.2
Restrictions
Systems for Which Adjustments Cannot Be Made
Accurately
Adjustments will not be made correctly for autotuning with a host reference in the following
cases. Use custom tuning.
• When the travel distance for the reference from the host controller is equal to or lower than
the setting of the positioning completed width (Pn522)
• Rotary Servomotors: When the movement speed for the reference from the host controller is
equal to or lower than the setting of the rotation detection level (Pn502)
• Linear Servomotors: When the movement speed for the reference from the host controller is
equal to or lower than the setting of the zero speed level (Pn581)
• When the time required to stop is 10 ms or less
• When the rigidity of the machine is low and vibration occurs when positioning is performed
• When the position integration function is used
• When mode switching is used
• When the positioning completed width (Pn522) is too narrow
Refer to the following sections for details on custom tuning.
8.8 Custom Tuning on page 8-41
Preparations
Always check the following before you execute autotuning with a host reference.
• The servo must be in ready status.
• There must be no overtravel.
• The servo must be OFF.
• The gain switching selection must be set to disable automatic gain switching (Pn139 =
n.0).
• The first gains must be selected.
• The test without a motor function must be disabled (Pn00C = n.0).
• There must be no warnings.
• The tuning-less function must be disabled (Pn170 = n.0).
• The parameters must not be write prohibited.
8.7.3
Applicable Tools
The following table lists the tools that you can use to perform autotuning with a host reference
and the applicable tool functions.
Tool Function Operating Procedure Reference
Digital Operator Fn202
Σ-7-Series Digital Operator Operating Man-
ual (Manual No.: SIEP S800001 33)
SigmaWin+ Tuning - Tuning
8.7.4 Operating Procedure on page 8-36
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