Technical data

Appendix
CPU 317T: Technology Functions
A-30 A5E00251798-03
A.3.4 Monitoring functions
A.3.4.1 Encoder monitoring functions
• Monitoring the zero mark of incremental encoders
A check on the number of increments between two zero marks can be
activated. If the zero mark is not reached within the defined distance, an alarm
is triggered.
In homing mode with zero mark, the path is monitored only after the axis has
left the BERO.
• Permissible changes to the actual value of an absolute encoder
Monitoring of the permissible changes to the actual value for an absolute
encoder can be activated.
• Current velocity
The maximum actual velocity value can be monitored. If the maximum value is
exceeded, the system variable sensordata.sensormonitoring.velocity is output
as limitexceeded. The velocity is not limited to this value.
A.3.4.2 Encoder limit frequency monitoring
Adherence to the encoder limit frequency is monitored. Actual velocity /actual
acceleration monitoring is also used to identify errors in the control loop of the
drives. An error is reported at the technology DB if the rise of the actual value
exceeds the limit frequency of the encoder. The error is indicated in ErrorStatus
"SensorFreqViolation" of the technology DB.