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Kepware Knowledge Base: Solution


Out of Range Errors Occur When Trying to Read I/O Addresses In a SLC5/05 PLC


Last Update: 2018/11/7

Problem:
Kepware's Allen-Bradley Ethernet Driver cannot read I/O addresses from a modular SLC5/05 PLC. Error messages indicating that the data requests are out of range are posted to the server's Event Log.

Possible Cause:
This usually occurs when the KEPServerEX project does not have all of the modular I/O slots configured in Device Properties. The driver needs to know the offset location for each data point order to properly access the I/O. The offset location is provided to the driver by configuring the slots in Device Properties.

Solution:
To remedy this, configure the slots in Device Properties.

Related Protocols
Allen-Bradley Ethernet