Beckhoff AX8000 User Information page 12

Introduction to the diagnostic system
Diagnostic type
Each diagnostic message is assigned to a diagnosis type that contains the type group of the diagnostic
object. In total, there are 20 different diagnosis type groups (see table).
The diagnosis type groups 0 to 16 differ from the rest because the error counters are read directly via the
associated CoE object. The CoE object is called 0x2C1E:x (DeviceMain error counter) and, analogous to the
diagnosis type groups, has 17 sub-objects. Each of these sub-objects has the same name as the assigned
diagnosis type group.
Diagnosis type group
0 Motor overload shut down
1 Motor overtemperature shut down
2 Drive overtemperature shut down
3 Control voltage error
4 Feedback error
5 Commutation error
6 Overcurrent error
7 Overvoltage error
8 Undervoltage error
9 Power supply phase error
10 Communication error
11 TorqueOff with emergency brake
12 Motor connection error
13 Safety STO error
14 Overspeed error
15 Motor Brake connection error
16 DC link connection overcurrent error
17 Warning
18 Information
19 Information without history entry
Reaction
The AX8000 can react in different ways to a diagnostic message. See also "AX8000 Diagnostic Messages".
In total there are seven different types of reaction, sorted hierarchically.
Since not all types of reaction are implemented, the next executable type of reaction is executed in the case
of an inexecutable reaction. The lowest type of reaction in this hierarchy is "torque-free".
Execution hierarchy Type of reaction
1 NC control
2 "Closed loop" ramp
3 "Open loop" ramp
4 Emergency brake
5 Torque-free
- No Reaction
Examples of the hierarchical reaction execution
Expected reaction according to diagnostic
1 NC control
2 "Closed loop" ramp
3 "Open loop" ramp
4 Emergency braking
5 Torque-free
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Description
Motor overloaded
Motor temperature exceeded
Axis module temperature exceeded
Error in the 24 V power supply
Error in the feedback system
Commutation error
Overcurrent error in the motor phases
Overvoltage in DC link
Undervoltage in DC link
Phase error in the supply module
Communication error
Torque-free axis with emergency braking
Motor connection error
Axis enabled and STO active
Speed exceeded
Motor brake connection error
Overcurrent error in the DC link
A warning has no effect on the AX8000.
Information has no effect on the AX8000.
Information has no effect on the AX8000.
Description
The reaction of the AX8000 is controlled by the NC. The reaction time in which
the AX8000 takes control can be parameterized (see "AX8000 Diagnostic Mes-
sages")
The axis is brought to a standstill in a controlled manner. The ramp is parame-
terizable.
The axis is brought to a standstill in a controlled manner. The ramp is parame-
terizable.
The motor is ramped down.
The AX8000 switches the axis torque-free.
No reaction takes place; the AX8000 remains in the normal operating condi-
tion.
Reaction performed by AX8000
2 "Closed loop" ramp
2 "Closed loop" ramp
5 Torque-free
4 or 5 For asynchronous motors this is followed by DC braking, for
synchronous motors torque-free
5 Torque-free
Version: 1.1 Multi axis servo system - AX8000