Siemens SINUMERIK 840D sl Commissioning Manual page 157

Transmission Monitoring the encoder position tolerance
The position difference between the two encoders or position measuring systems of a
machine axis is monitored with
● MD36510 ENC_DIFF_TOL (measuring system synchronism tolerance)
Error response
● Alarm: "25105 Measuring systems are not synchronous"
and stopping the machine axes using a speed setpoint ramp whose characteristic is set in
the following machine data:
● MD36610 AX_EMERGENCY_STOP_TIME (time for braking ramp when an error occurs)
Figure 10-18 Monitoring for SINUMERIK 840D sl:
Literature
Function Manual Basic Functions; Axis monitoring: Protection zones
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
NOTICE
MD36620 SERVO_DISABLE_DELAY_TIME (switchoff delay servo enable)
must always be selected greater than
MD36610 AX_EMERGENCY_STOP_TIME (time for braking ramp when an error occurs)
If this is not the case, the braking ramp cannot be kept.
NCK start-up
10.5 Parameterize axis data
157