Details
Description
If the slave is in CP4 and both wires get disconnected the slaves drops back to NRT (through: Amount of MST losses in CP3 & CP4 exceeded). Now the red LED turns on because this is an C1D Error and the S-0-0099 is required to turn the LED out.
Expected an Error-Code in S-0-0390: 4001 Error of MST losses. See: https://wiki.sercos.org/rc/SCP_StatusCodes
And the LED: https://wiki.sercos.org/rc/FG_Diagnosis