A32920 — Encoder 2: Temperature sensor fault

A32920 is the temperature sensor fault of the Encoder 2 sensing channel: while evaluating the motor temperature sensor connected there, the drive detected a fault. The manuals describe the condition identically for Sensor Module Encoder 2 across the drive families, so the message means the same thing on all of them. Depending on the drive's configuration, the same condition can also be issued as a fault or be signalled without a reaction.

• Wire breakage or the sensor is not connected — fault cause 1 (= 01 hex): KTY: R > 1630 Ohm, PT1000: R > 1720 Ohm.
• The measured resistance is too low — fault cause 2 (= 02 hex): PTC: R < 20 Ohm, KTY: R < 50 Ohm, PT1000: R < 603 Ohm.
• The Sensor Module itself can be the cause: the manual names a hardware defect or incorrect calibration data as the reason for replacing it.

1. Check that the encoder cable is the correct type and is correctly connected.
2. Check the temperature sensor selection in p0600 to p0603 — p0600 sets the motor temperature sensor for monitoring and p0603 the CI: motor temperature signal source.
3. Replace the Sensor Module — the manual gives a hardware defect or incorrect calibration data as the reason.

The drive puts two pieces of information into the message value: the fault cause (%1) and the channel number (%2). You read them in r0949 (fault value) or r2124 (alarm value). The individual information is coded as follows in the message value (r0949/r2124): 0000yyxx hex: yy = channel number, xx = error cause

• xx = 01 hex (fault cause 1): wire breakage or sensor not connected — KTY: R > 1630 Ohm, PT1000: R > 1720 Ohm.
• xx = 02 hex (fault cause 2): measured resistance too low — PTC: R < 20 Ohm, KTY: R < 50 Ohm, PT1000: R < 603 Ohm.
• Additional values are only for internal Siemens troubleshooting.

• r0949 — fault value: shows the coded message value (0000yyxx hex) while the condition is present as a fault.
• r2124 — alarm value: shows the same coding while A32920 is present as an alarm.
• p0600 — motor temperature sensor for monitoring: check the sensor selected here as part of the temperature sensor selection in p0600 to p0603.
• p0603 — CI: motor temperature signal source: also part of the sensor selection to be checked for this message.

As an alarm, A32920 requires no acknowledgement. If the drive's configuration raises the same condition as a fault, it must be acknowledged immediately so the drive can be restarted. The manual names no separate reset action: the cause is removed with the checks above — cable type and connection, the sensor selection in p0600 to p0603, or a Sensor Module replacement.