10.94
12 Functional Descriptions
12.20.1 Functional description
12.20.1
Functional description
The term "Extended stop and retract" refers to the error reactions listed below:
•
Parameterization of error reaction by means of machine data and part program commands
•
Monitoring sources (error identification)
•
Shutdown of machine in order to prevent damage to tool or workpiece wherever possible
•
Separation of tool and workpiece through traversing motions (retractions) initiated in the
event of an error/fault
The 840C system and SW version 4 provides an extended functionality for the retraction
operation. The axes/spindles (drives, motors, encoders, etc.) and the control involved in the
controlled stop and retract process must all be operational: If one of these components fails,
the full scope of the system reaction described below may not be available.
"Extended stop and retract" comprises the following functions:
•
Monitoring sources (error detection)
•
DC link buffering (generator operation)
•
Stopping and
•
Retraction
Both the sources for error detection and the reactions in the form of stop and retraction can be
•
parameterized via machine data (NC and drive)
•
controlled via the PLC and/or
•
programmed by means of G commands.
Both sources and reactions can be
•
internal and/or
•
external.
12.20.2
Parameterization, control and programming
The "Extended stop and retract" function comprises:
1.
Parameterization of the operating characteristics via machine data:
•
General machine data:
–
To enable the new operating characteristics for the stop process
–
To parameterize the times for extended stopping
•
Machine data specific to channel/mode group:
–
To assign the mixed I/O modules for the retraction operation in the form of:
-
Inputs (external sources) and
-
Outputs (external reactions).
–
Application of internal sources:
-
Mode group stop
-
EMERGENCY STOP
which must initiate a retraction operation.
–
Definition of internal reactions to be initiated in the case of a retraction operation:
-
Alarm and mode group stop
-
Retraction operation as open-loop control function and/or as
-
Autonomous drive function
•
Machine data specific to axis/spindle:
–
To assigned the mixed I/O modules for the retraction operation in the form of:
-
Outputs (external reactions)
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
12–213
SINUMERIK 840C (IA)
Summary of Contents for SIMODRIVE 611-D
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