F01355 — Topology: Actual topology changed

F01355 is generated when the device target topology (p0099) does not correspond to the device actual topology (r0098) — the drive expects a different arrangement of components than the one actually connected. The fault only occurs if the topology was commissioned using the automatic internal device mechanism and not using the commissioning software (commissioning tool).

The device's automatic function only accepts a constant topology. Topology changes that result in this fault being generated cannot be accepted by the automatic function in the device, but must be transferred using the commissioning software and parameter download. If the topology is changed anyway, all of the previous parameter settings are lost and replaced by the factory setting.

• The device target topology (p0099) does not correspond to the device actual topology (r0098).
• The fault only occurs if the topology was commissioned using the automatic internal device mechanism and not using the commissioning software/tool.

1. Confirm that no faults have occurred in the topology detection itself — the counter-measures below apply only in that case.
2. If commissioning is still not completed: carry out a self-commissioning routine starting from p0009 = 1. In general: set p0099 = r0098 and set p0009 = 0; for existing Motor Modules this results in servo drives being automatically generated (p0107).
3. Alternatively, generate the drive objects explicitly with p0097 and then set p0009 = 0: p0097 = 1 generates servo drives, p0097 = 2 generates vector drives, p0097 = 12 generates vector drives with parallel circuit/connection.
4. To set configurations in p0108, first set p0009 = 2 and modify p0108 — its index corresponds to the drive object (p0107) — before setting p0009 = 0.
5. If commissioning has already been completed: either re-establish the original connections and re-connect power to the Control Unit, or restore the factory setting for the complete equipment (all of the drives) and allow automatic self-commissioning again, or change the device parameterization to match the connections — this last option is only possible using the commissioning software/tool.

• The drive writes the fault value into r0949; interpret it as a decimal number.
• The manual gives no decoding of the value — it is used only for internal Siemens troubleshooting.

• p0099 (device target topology): set it equal to r0098 to make the target topology match what is actually connected.
• r0098 (actual device topology): read here how the device is actually connected and compare it with p0099.
• r0949 (fault value): holds the message value of F01355 as a decimal number; only for internal Siemens troubleshooting.
• p0009 (device commissioning parameter filter): set to 1 to start the self-commissioning routine, set to 2 to modify p0108, and set to 0 to close commissioning.
• p0097 (select drive object type): set to 1 for servo drives, 2 for vector drives or 12 for vector drives with parallel circuit/connection, each time followed by p0009 = 0.
• p0107 (drive object type): shows the drive object type automatically generated for existing Motor Modules; its index corresponds to the drive object used for p0108.
• p0108 (drive objects function module): modify it while p0009 = 2 to set the configurations per drive object.

The fault is acknowledged immediately; the drive itself takes no automatic action on it. Acknowledging alone does not remove the cause — the fault stays cleared only after one of the counter-measures above has made the target topology (p0099) match the actual topology (r0098).