Siemens SINUMERIK 840 Planning Manual page 81

5 Configuring
5.6 FB 121 Measure tool and workpiece
Commands issued by the NC
• Measure workpiece
The D number and TO area of the nth cutting edge and the mth offset of the active tool
are to be provided at the measuring interface which is described by the ID number. The
tool is searched for in the magazine which is specified by the extended address. If the
extended address = 0, the magazine number assigned to the current NC channel is
accepted (NC channel number = magazine number).
• Positive acknowledgement (for "Measure tool at first application" only)
Identification bit 3 "Measure tool at first application" is deleted for the measured tool.
• Negative acknowledgement
As for "positive acknowledgement". In addition, identification bit 10 "Tool disabled" is set
for the tool measured.
Signal chart for "Measure workpiece"
The measuring cycle provides the data of the tool to be measured (ID number, magazine
number, cutting-edge and offset number) for the FB 121 at the channel-specific measuring
interface. Then the tool is searched for by FB 121 and the D number as well as the associated
TO area entered in the interface. If the measurement shows that the degree of wear is too
high, a negative acknowledgement for the tool currently measured is transferred by the
measuring cycle to FB 121 via the channel-specific measuring interface (see "Measure tool
with negative acknowledgement"). In the case of an error, this operation is acknowledged by
FB 121 with "No active tool available".
Provide ID, magazine,
cutting edge and offset No.
at the measuring interface
Measure tool
Status bit 15:
Job initiation (NC) by NC
Status bit 10:
Measure tool
Status bit 9:
Negative acknowledgement
if tool is worn
Initialization of data
interface with D No. and
TO area
Status bit 7
Job initiation (PLC)
Status bit 2:
Acknowledgement of D No.
and TO area
by NC entered
5–20
(see tool measurement)
© Siemens AG 1991 All Rights Reserved
01.91
Initiation
Positive acknowledgement
6FC5 197-0AA40-1BP1
SINUMERIK 840/880 (PJ)