Notes
SINUMERIK 802D sl Operating and Service Training Manual Page 3
C31
C31
Section 3
Function of alarm
Alarms are generated for a purpose, the purpose is primarily to protect the
machine operator in the
case of a dangerous situation and secondly to
protect the
machine from damage.
To cater for
the above two cases we can react in two ways:
1)
Pure PLC reaction
2)
PLC >> NC reaction
The first is t
o use the alarm to warn the operator of a problem, e.g. coolant
is low in the
machine. In such a case the axis can be prevented from mov-
ing by various disable
signals in the PLC interface.
The second
case is to configure the alarm in such a way that the NC can
react itself.
e.g. in the case of an alarm NC start can be automatically in-
hibited.
The possib
ilities are listed below:
MD 14516[index] Meaning
Bit 0 NC Start inhibit
Bit 1 Read-in disable
Bit 2 Feed disable for all axis
Bit 3 Emergency stop
Bit 4 PLC Stop
Bit 5
Bit 6 Cancel with Delete key
Bit 7 Power on
3.1 Function of alarm
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