A33461 — Encoder 3: Analog sensor channel B failed

A33461 reports that the input voltage of the analog sensor connected to Encoder 3, channel B, is outside the permissible limits. The alarm value stored with the message tells which measuring-range condition was violated. Depending on how the drive is configured, the same condition can also be issued without a reaction (N) instead of as an alarm.

• The input voltage of the analog sensor at Encoder 3, channel B, is outside the permissible limits. Which limit was violated is shown by the alarm value in r2124 (see the alarm value decoding below).

1. Read the alarm value of the message in r2124 and interpret it as a decimal number; it tells you which limit violation occurred.
2. Alarm value 1: check the output voltage of the analog sensor.
3. Alarm value 2: check the voltage setting for each encoder period (p4675).
4. Alarm value 3: check the range limit setting and increase it if necessary (p4676).

The message value %1 is the alarm value, which the drive stores in r2124; interpret it as a decimal number:

• 1: Input voltage outside detectable measuring range.
• 2: Input voltage outside the selected measuring range (p4675).
• 3: The absolute value of the input voltage has exceeded the range limit (p4676).

• r2124 — alarm value of this message; read it as a decimal number to determine whether the detectable measuring range, the selected measuring range or the range limit was exceeded.
• p4675 — voltage of analog sensor channel B per encoder period; check this setting when the alarm value is 2.
• p4676 — range limit threshold of the analog sensor; check this setting and increase it if necessary when the alarm value is 3.

No acknowledgment is required for this message and the drive does not trip because of it; the alarm goes once the input voltage of the analog sensor is back within the permissible limits. This also applies when the condition is configured to be issued without a reaction (N): no acknowledgment is required in that case either.