Siemens SINUMERIK 840Di Manual page 349
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Also See for SINUMERIK 840Di:
- Function manual (2050 pages) ,
- Diagnostic manual (880 pages) ,
- System overview (55 pages)
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06.03
Encoder
zero mark
monitoring
Position tolerance
when switching over
the encoder
Cycl. monitoring of
encoder
position tolerance
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
The zero mark monitoring of the encoder of a machine axis checks whether
pulses were lost between two zero mark passes.
S
MD 36310: ENC_ZERO_MONITORING (zero mark monitoring)
is used to enter the number of detected zero mark errors at which the
monitoring is to respond.
Special feature:
A value of 100 will additionally disable the hardware monitoring of the encoder.
Error response
S
Alarm: 25020 Zero mark monitoring"
and stopping the machine axes using a speed setpoint ramp whose
characteristic is set in
S
MD36610: AX_EMERGENCY_STOP_TIME (time of brake ramp in case of
error conditions).
Error causes/remedy
S
MD36300: ENC_FREQ_LIMIT [n] (encoder limit frequency) set too high
S
Encoder cable damaged
S
Encoder or encoder electronics defective.
It is possible to switch over between the two possible encoders or position
measuring systems of a machine axis at any time. The permissible position
difference between the two position measuring systems is monitored.
S
MD 36500 ENC_CHANGE_TOL (maximum tolerance when switching over
the actual position value)
Error response
S
Alarm: "25100 Measuring system cannot be switched over"
The requested switchover to another encoder is not carried out.
Error causes/remedy
S
The specified permissible tolerance is too small
S
The position measuring system to which you will switch over is not
referenced.
The position difference between the two encoder or position measuring systems
of a machine axis is monitored with
S
MD36510 ENC_DIFF_TOL (measuring system synchronism tolerance)
Error response
S
Alarm: "25105 Measuring systems are not synchronous"
and stopping the machine axes using a speed setpoint ramp whose
characteristic is set in
S
MD36610: AX_EMERGENCY_STOP_TIME (time of brake ramp in case of
error conditions).
10 NC Start-Up with HMI Advanced
10.5 Axes and spindles
10-349
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