Siemens A01943 fault code meaning
Siemens / A01943
Series: DCM-6RA80
PB/PN: Interference affecting cyclic signal in bus topology
DC drive
Meaning: The bus is in the data exchange state (Data Exchange), and isochronous synchronization has been selected via the configuration telegram, but global control telegrams for synchronization are received at irregular intervals. - The master sends global control telegrams at irregular intervals. - The master uses a different isochronous DP cycle from the cycle in the configuration telegram transmitted to the slave.
Possible causes
Source: SINAMICS DCM, Parameter Manual, firmware version 1.5 SP2 (based on 5.1 SP2) P985
Series: G120-CU250S-2
PB/PN cycle signal affected by interference in bus topology
converter
Meaning: The bus is in the data exchange state (Data Exchange), and isochronous operation has been selected via the configuration telegram, but global control telegrams for synchronization are received at irregular intervals. - The master sends global control telegrams at irregular intervals. - The master uses a different isochronous DP cycle from the cycle in the configuration telegram transmitted to the slave.
Possible causes
Source: SINAMICS G120, Control Unit CU250S-2 P1340
Series: G130-G150, S120-S150
PB/PN: Interference affecting cyclic signal in bus topology
converter
Meaning: The bus is in the data exchange state (Data Exchange), and isochronous operation has been selected via the configuration telegram, but global control telegrams for synchronization are received at irregular intervals. - The master sends global control telegrams at irregular intervals. - The master uses a different isochronous DP cycle from the cycle in the configuration telegram transmitted to the slave.
Possible causes
Source: SINAMICS G130_G150 P1557; SINAMICS S120_S150 P2666
Series: G200
PN: Cyclic signal fault in the bus topology
converter
Meaning: The bus is in the data exchange status (Data Exchange), and isochronous synchronization has been selected via the configuration telegram, but no isochronous telegram has been received. - The controller is sending non-isochronous telegrams. - The controller is using a different isochronous bus cycle from the cycle transmitted to the device in the configuration telegram. System messages 14.3 Faults and alarms SINAMICS G200 Basic converter Operating Instructions, 12/2025, FW V6.6, A5E54053398B AA 557
Possible causes
Source: SINAMICS G200 Basic converter P559
Series: G210, G220, S220
PN: Cyclic signal fault in the bus topology
converter
Meaning: The bus is in the data exchange state (Data Exchange), and isochronous synchronization has been selected via the configuration telegram. Synchronization telegram reception is unstable or irregular. - The controller is sending non-isochronous telegrams. - The controller is using a different isochronous bus cycle from the cycle transmitted to the device in the configuration telegram.
Possible causes
Source: SINAMICS G210 Converter P1077; SINAMICS G220 Converter P1284; SINAMICS S220 Converter P2194
Series: G210X
PN: Cyclic signal fault in the bus topology
converter
Meaning:
Possible causes
Source: SINAMICS G210X converter P939
Series: S110
PB/PN cycle signal affected by interference in bus topology
servo drive
Meaning: The bus is in the data exchange state (Data Exchange), and isochronous synchronization is selected via the configuration telegram, but global control telegrams for synchronization are received irregularly. - The master sends an irregular global control telegram. - The master uses a different isochronous DP cycle from the cycle specified in the configuration telegram transmitted to the slave.
Possible causes
Source: SINAMICS S110 P990
Series: S200, S210
PN: Cyclic signal fault in the bus topology
servo drive
Meaning: The bus is in the data exchange state (Data Exchange), and isochronous synchronization has been selected via the configuration telegram, but no isochronous telegram has been received. - The controller is sending non-isochronous telegrams. - The controller uses a different isochronous bus cycle from the cycle transmitted to the device in the configuration telegram.
Possible causes
Source: SINAMICS S200 PROFINET_SIMOTICS S-1FL2 P501; SINAMICS S210_SIMOTICS S-1FK2 and S-1FT2 P1312