FAQs - Troubleshooting
Based on input from our customers, here are some of the frequently asked questions that might help
you to troubleshoot an actuator in an IO-Link network:
Why is the actuator not running despite giving it a run command?
If the actuator is not running when applying a run command (0xFFFD/65533 for out and 0xFFFE/65534
for in), please check the following:
1. Make sure power is applied from the power supply
2. Send a “clear error” (0xFFFC/65532) command before sending a run command
Does the actuator support data storage?
The current version (v.1.1) of LA25 IO-Link supports data storage.
This will make replacements easier, since the parameters are stored directly in the master.
Why do I get feedback (data) but the actuator is unable to run?
The LA25 is designed with a split supply PCB. This means, that an IO-Link master can receive data from the
actuator, despite not supplying 24 VDC to the motor itself from a power supply.
1. Make sure power is applied from the power supply to the brown and blue wires - see port configu-
2. If the actuator is powered directly from the master, this must meet the amp requirements as speci-
fied on the product label (max. 2.5 amps on a standard LA25)
Still experiencing problems with your actuator?
Please contact your local LINAK office for technical support.
Where can I find the latest IODD file?
On the official IODD Finder, you can always find the latest version for LA25 - visit
Why does the PLC show a reversed data order?
On most PLCs and IO-Link masters, the IODD file will ensure the correct order of data input/output bytes
according to the table above. However, some controllers may reverse the data order. Please make sure the
correct Most Significant Byte [MSB] and Least Significant Byte [LSB] is matching your configuration.
If you experience maximum feedback data values (position, current and/or speed), 0xFF [255] for byte data
types and 0xFFFF [65535] for integer data types, the order in most likely reversed.
What has the highest priority - process or parameter and diagnostic data?
Commonly referred to as cyclic and acyclic data. For example, current limit value in amps can be set in both
cyclic and acyclic data. In this case the lowest value determine when the actuator will stop.
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