Specifications

Drive set-up procedure
14.1.2
NCK processing capability
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14.1.2 NCK processing capability
With this setting, it is specified that how much CPU power should be distributed from PCU
unit to NCK (NC kernel) in YS 840DI system.
50-75% should be specified with the following machine data.
• MD10185 NCK_PCOS_TIME_RATIO
Meaning: CPU power ratio to be distributed to NCK.
Setting value: [%]
Standard setting value: 65 [%]
Set the following machine data to make an adjustment between high NCK processing speed
and high screen refreshing speed.
• MD10131 SUPPRESS_SCREEN_REFRESH
Meaning: Suppression setting of HMI screen refreshing
0 --- Suppression for entire system
1 --- Suppression only for a partial system in which the processing must be
done in a short time.
2 --- No suppression at all
Standard setting value: 0
14.1.3 Servo control method and fundamental operation
 CNC setting
The servo control method of YS 840DI system is called "DSC" (Direct Servo Control). In
this method, CNC and drives perform position control to attain high-speed response. To
enable this control method, set the following parameters.
• MC32640 STIFFNESS_CONTROL_ENABLE [0] (for each axis) ##
Setting value: 1
• MD13060 DRIVE_TELEEGRAM_TYPE [0] (for the 1st axis) ##
MD13060 DRIVE_TELEEGRAM_TYPE [1] (for the 1st axis) ##
: (Repeat for all remaining axes)
Setting value: 201
For operation specification at NCK reset and system shutdown, set the following machine
data.
• MD11250 PROFIBUS_SHUTDOWN_TYPE (Spindle)
Meaning: Operation specification at NCK reset and shutdown
Setting value: 0 --- Drive stops on an alarm without PROFIBUS cleared.
1 --- Drive stops after deceleration with PROFIBUS cleared.
2 --- Drive stops after deceleration without PROFIBUS cleared.
Standard setting value: 2
This machine data was added to 01.00.00 system. For systems earlier than this version, the
data should be set to 0.
INFO