11.92
5 Configuring
5.6 FB 121 Measure tool and workpiece
Signal chart for "Measure tool" (Identification bit 1 = 1)
The data is provided by FB 135. After measuring the tool, FB 121 receives either a positive or
negative acknowledgement from the measuring cycle depending on the result of the
measurement. In the case of a positive acknowledgement, identification bit 3 "Measure tool
prior to first application" of the measured tool is reset. In addition, identification bit 10 "Tool
disabled" is set in the case of a negative acknowledgement. Identification bit 1 "Measure tool"
is maintained.
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Initialization of
data interface
Status bit 7:
Job initiation (PLC)
from FB 135
Status bit 0:
Measure tool
Tool being
measured
Status bit 15:
Job initiation (NC)
Status bit 8:
Positive acknow-
ledgement from NC
Identification bit 3:
Measure tool at
first application
Status bit 15:
Job initiation (NC)
Status bit 9:
Negative acknow-
ledgement from NC
Identification bit 3:
Measure tool at
first application
Identification bit 10:
Tool disabled
© Siemens AG 1991 All Rights Reserved 6FC5 197-0AA40-1BP1
5–19
SINUMERIK 840/880 (PJ)