A
Appendix 01/2008
B Terms
© Siemens AG 2008 All rights reserved.
A-448 SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
B Terms
Important terms are listed in alphabetical order. For terms, that appear
in the explanation and for which there is a dedicated entry, reference
is made using →.
A
Axes
In accordance with their functional scope, the CNC axes are
subdivided into:
• Axes: Interpolating path axes
• Auxiliary axes: Non-interpolating feed and positioning axes with an
axis-specific feed rate. Auxiliary axes are not involved in the actual
machining, and include for example tool feeders and tool
magazines.
Axis identifier
Axes are labeled in accordance with DIN 66217 (for a clockwise
orthogonal → coordinate system) with the letters X,Y, Z.
→ Rotary axes which rotate about X,Y,Z are labeled with the letters A,
B, C. Additional axes parallel to the above can be identified with
further address letters.
Axis address
See → Axis identifier
Axis name
See → Axis identifier
Address
An address is the identifier for a certain operand or operand range,
e.g., input, output, etc.
Alarms
All → messages and alarms are displayed on the operator panel in
plain text with date and time as well as the appropriate symbol for the
delete criterion. Alarms and messages are displayed separately.
1. Alarms and messages in the part program
Alarms and messages can be displayed directly from the part
program in plain text.
2. Alarms and messages from PLC
Alarms and messages relating to the machine can be displayed
directly from the PLC program in plain text. No additional function
block packages are required for this purpose.
Drive
•
•
User-defined variable
Users can define variables in the → part program or data block (global
user data) for their own use. A definition contains a data type
specification and the variable name. See also → System variable.
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