Siemens SINUMERIK 840Di Function Manual page 88

Detailed Description
2.2 Encoder monitoring
Activation
Actual velocity monitoring is activated as soon as the active measuring system:
DB31, ... DBX1.5 / 1.6 (position measuring system 1 / 2)
supplies valid actual values (encoder limit frequency is not exceeded).
Effectivity
The actual velocity monitoring only operates with active position control and the following
axis types:
• Linear axes
• Rotary axes
• Open loop controlled and position controlled spindles
Effect
Upon exceeding of the threshold, the following occurs:
• Alarm: "25030 Axis <
• The affected axis is stopped via the configured braking ramp in follow-up mode:
• If the axis/spindle is involved in interpolation with other axes/spindles, these are brought
2.2 Encoder monitoring
2.2
2.2.1 Encoder limit frequency monitoring
Function
Monitoring of the parameterized encoder limit frequency:
MD36300 $MA_ENC_FREQ_LIMIT (encoder limit frequency)
2-16
Axis identifier
MD36610 $MA_AX_EMERGENCY_STOP_TIME
(Time for braking ramp when an error occurs)
to a standstill with rapid stop (set velocity = 0).
> Actual velocity alarm limit"
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Axis Monitoring, Protection Zones (A3)