Siemens SINAMICS G150 Operating Manual page 167

11/03
A1921
PROFIBUS: Clock cycle synchronization
Cause: Output data of PROFIBUS master (setpoints) received at wrong time within the PROFIBUS
clock cycle.
Remedy: Check the bus configuration:
- Parameter for clock cycle synchronization: Ensure that time for setpoint acceptance To >
Data Exchange time Tdx
A1930
PROFIBUS: Current controller clock cycle not identical
Cause: Current controller clock cycle of all drives must be set identically for clock-synchronous
PROFIBUS.
Alarm value Number of drive object with different current controller clock cycle.
(r2124):
Remedy: - Set current controller clock cycles to identical values (p0115[0]).
See also: p0115
A1931
PROFIBUS: Speed controller clock cycle not clock-synchronous
Cause: Speed controller clock cycle of all drives for clock synchronous PROFIBUS must be set
identically.
Alarm value Number of the drive object with different speed controller clock cycle.
(r2124):
Remedy: - Set speed controller clock cycles to identical value (p0115[1]).
See also: p0115
A1940
PROFIBUS: Clock synchronism not achieved
Cause: The PROFIBUS is in the Data Exchange state and isochronous operation has been selected
via the parameterizing telegram. Synchronization to the clock cycle specified by the master
and to the master sign-of-life was not possible.
- Master does not send global control telegram although isochronous mode was selected via
bus configuration.
- Master uses a different isochronous DP clock cycle than transferred to the slave in the
parameterization telegram.
- Master does not increment its sign-of-life (CTW2 Bit 12-15) in the configured time frame
Tmapc.
Remedy: - Check master application and bus configuration.
- Check consistency between clock cycle input for slave configuration and clock cycle setting
at the master.
If the bus clock cycle Tdp is not equal to master application cycle time Tmapc:
- Correct interconnection of the master sign of life (p2045).
- Check whether the sign of life was sent correctly by the master.
A1941
PROFIBUS: Clock cycle signal missing for bus setup
Cause: The PROFIBUS is in the Data Exchange state and isochronous operation has been selected
via the parameterizing telegram. The global control telegram for synchronization is not being
received.
Remedy: Check master application and bus configuration.
A1943
PROFIBUS: Clock cycle faulted during bus setup
Cause: The PROFIBUS is in the Data Exchange state and isochronous operation has been selected
via the parameterizing telegram. The global control telegram for synchronism is received
irregularly.
- The master sends an irregular global control telegram.
- The master uses a different isochronous DP clock cycle than the one transferred to the
slave in the parameterization telegram.
Remedy: - Check master application and bus configuration.
- Check consistency of the clock cycle entered for the slave configuration and the clock
cycle setting at the master.
F1950
PROFIBUS: Synchronization clock-synchronous mode failed
Reaction: OFF1
SINAMICS G150
Operating Manual
Diagnosis / Faults and Alarms
10-25