09.91 4 Monitoring Functions
4.1 General
4 Monitoring Functions
4.1 General
The control contains permanently active monitoring functions which detect faults in the NC, the
interface control and the machine at such an early stage that 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 no.
and further
identifiers
Area for the
alarm text
ALARM LINE
© Siemens AG 1990 All Rights Reserved 6ZB5 410-0EP02 4-1
SINUMERIK 810T, GA3 (BN)
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