F32111 — Encoder 2: Absolute encoder internal fault

F32111 is raised against Encoder 2 when the connected absolute encoder itself reports an internal error: the encoder's error word arrives with error bits set, and the drive forwards this detailed information as the fault value. The G130/G150 manual titles the code "Encoder 2: Absolute encoder internal fault", the S120/S150 manual "Encoder 2: Encoder signals an internal error (detailed information)" — the description is the same. Depending on the drive configuration, the same condition can also be issued as an alarm or with no reaction at all.

• The absolute encoder signals an internal error: its fault word supplies fault bits that have been set, and the drive relays them for Encoder 2.
• Encoder-internal defects: the lighting system has failed (bit 0), the signal amplitude is too low (bit 1), the position value is incorrect (bit 2), or supplementary information yyyy = 1 indicates a defective encoder.
• 5 V encoder power supply faults: an overvoltage condition (bit 3), an undervoltage condition (bit 4) or an overcurrent condition (bit 5).
• The battery must be changed (bit 6) — this applies only to encoders with battery back-up.

1. Determine how the fault value can be read: with p0404.8 = 1 the value in r0949, interpreted binary, reads as yyyyxxxx hex (yyyy = supplementary information, xxxx = fault cause); with p0404.8 = 0 the value is intended for internal Siemens troubleshooting and gives you no decodable bits.
2. If bit 0, bit 1, bit 2 or bit 5 is set: the encoder is defective. Replace the encoder; where the motor encoder has a direct DRIVE-CLiQ socket, replace the motor.
3. If bit 3 or bit 4 is set (5 V power supply voltage fault): when an SMC is used, check the plug-in cable between the encoder and the SMC or replace the SMC; when a motor encoder with a direct DRIVE-CLiQ connection, or a motor with DRIVE-CLiQ, is used, replace the motor.
4. If bit 6 is set: change the battery (only for encoders with battery back-up).
5. If yyyy = 1: the encoder is defective — replace the encoder.

• The message value carries two placeholders: %1 = fault cause (binary), %2 = additional information.
• With p0404.8 = 1, the fault value in r0949, interpreted binary, is yyyyxxxx hex: yyyy = supplementary information, xxxx = fault cause.
• yyyy = 0, Bit 0: Lighting system failed.
• yyyy = 0, Bit 1: Signal amplitude too low.
• yyyy = 0, Bit 2: Position value incorrect.
• yyyy = 0, Bit 3: Encoder power supply overvoltage condition.
• yyyy = 0, Bit 4: Encoder power supply undervoltage condition.
• yyyy = 0, Bit 5: Encoder power supply overcurrent condition.
• yyyy = 0, Bit 6: The battery must be changed.
• yyyy = 1 carries only supplementary information; the manual's remedy is simply to replace the encoder.
• With p0404.8 = 0 the fault value is reserved for internal Siemens troubleshooting.

• p0404 (encoder configuration effective): bit 8 of this parameter decides whether the fault value of F32111 decodes as yyyyxxxx hex (p0404.8 = 1) or is internal Siemens troubleshooting data (p0404.8 = 0).
• r0949 (fault value): read it in binary for this code — it holds the yyyyxxxx hex pattern whose fault cause bits and supplementary information are decoded above.

Once the cause has been removed — encoder or motor replaced, the 5 V supply fault cleared or the battery changed — acknowledge the fault and restart the drive; the drive only accepts acknowledgement while pulses are inhibited. When the condition is configured as an alarm or with no reaction, the drive takes no automatic action and no acknowledgement is required.