09.91 4 Monitoring Functions
4.1 General
4 Monitoring Functions
4.1 General
The control contains permanently active monitoring functions, which can detect faults in the
NC, the interface control and the machine at such an early stage that extensive damage to the
workpiece, tool or machine are practically eliminated. If a fault occurs, first of all machining is
interrupted and the drives brought to a standstill, and then the reason for the fault is stored
and displayed as an alarm. At the same time the PLC is informed that an NC alarm is present.
Monitoring functions exist for the following areas:
– Reading in
– Format
– Measuring circuit cables
– Encoders and drives
– Contour
– Spindle speed
– Enable signals
– Voltage
– Microprocessors
– Serial interfaces
– Transfer between NC and PLC
– Voltage level of the back-up battery
– System program memory
– User program memory.
4.2 Diagnostics display on the CRT
Messages from the monitoring system are displayed in the ”Alarm line” of the CRT display.
The ”Alarm line” is the second display line from the top.
Upper CRT display limit
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Area for the
alarm text
ALARM LINE
Area for the
alarm no.
and further
identifiers
© Siemens AG 1990 All Rights Reserved 6ZB5 410-0EQ02 4-1
SINUMERIK 810M, GA3 (BN)
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