Siemens SINUMERIK 840D sl Function Manual page 694

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11.3 Safety messages for SINAMICS S120

Acknowledging faults

The list of faults and alarms specifies how to acknowledge each fault after the cause has been

The fault is acknowledged by a POWER ON (switch drive unit off and on again).

If the fault cause has still not been resolved, then the fault is immediately displayed again after booting.

Re-establishing communications to the NCK or PLC after a communication failure has been detected to this

component is an exception. In this case, just the same as for a normal boot, the failsafe values are activated,

however the alarms present are acknowledged for a new communication failure.

Starting from a drive object, the fault can be acknowledged by the following methods:

1. Acknowledge via setting parameter:

p3981 = 0 → 1

2. Acknowledge via binector inputs:

p2103 BI: 1. Acknowledge faults

p2104 BI: 2. Acknowledge faults

p2105 BI: 3. Acknowledge faults

3. Acknowledging via a PROFIBUS control signal:

STW1.7 = 0 → 1 (signal edge)

● This fault can also be acknowledged using POWER ON.

● If the cause of the fault has not been removed the fault is not cleared after acknowledgment.

● Faults from SH/SBC

The "Safe Standstill" (SH) function must be deselected before acknowledging these faults.

The fault can only be acknowledged in the READY state.

In this state, the DC link is charged and the pulses are inhibited.

List of faults and alarms

Axxxxx (F, N)

Fxxxxx (A, N)

A message comprises a letter followed by the relevant number.

The meaning of the letters is as follows:

● A stands for "Alarm"

● F means "Fault"

● N means "No message" or "Internal message" (or No report)

● C means "Safety message"

Alarm xxxxx (message type can be changed into F or N)

Fault xxxxx (message type can be changed to A or N)

No message (message type can be changed to A)

Safety message (dedicated message buffer)

Function Manual, 12/2017, 6FC5397-4BP40-6BA1

Safety Integrated