PDO value out of range (_ecPDO_VALUE_OUT_OF_RANGE)

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This error occurs during Real-time Ethernet control when a Process Data Object (PDO) value sent to the drive exceeds its valid range, often seen with velocity reference PDOs. This typically happens when an axis geared to a master reference has its master position/encoder value changed programmatically, leading to an excessive velocity demand. An out-of-range PDO can cause erratic or uncontrolled motion and system instability.

• The master controller is sending a velocity reference (e.g., via a Velocity PDO) that exceeds the drive's configured maximum speed limit (e.g., P3-05 (Maximum Speed)).
• A position reference PDO is sent with a value outside the configured software travel limits (e.g., P4-01 (Software Limit Positive), P4-02 (Software Limit Negative)).
• Incorrect scaling or unit conversion in the master controller, leading to an artificially high or low PDO value being transmitted.
• Corruption of the PDO data in transit due to network interference or a faulty cable, resulting in an erroneous value.
• Attempting to write a negative value to a PDO that expects only positive inputs (e.g., a torque limit PDO).

Klikk på steg for å spore fremgangen.

1. 1

   Review the master controller's program and ensure that any PDO values (e.g., target velocity, target position) sent to the drive are within the drive's configured limits (e.g., P3-05 (Maximum Speed), P4-01 (Software Limit Positive)).

2. 2

   Check the scaling factors and unit conversions in the master controller's configuration (e.g., 1000 counts/sec to 1 RPM) to ensure they match the drive's expected input units.

3. 3

   Monitor the actual PDO values being sent by the master using a network analyzer or the drive's diagnostic tools to identify the specific out-of-range value.

4. 4

   Inspect the Ethernet cabling for damage or improper shielding, and check for strong electromagnetic interference in the vicinity of the network connection points.

5. 5

   If applicable, adjust the drive's internal limits (e.g., P3-05 (Maximum Speed), P4-01 (Software Limit Positive)) to accommodate the required operational range, but always within safe mechanical limits.