The AcquiSuite A8812 responds with Error 11: Resource Temporarily Unavailable.

Issue

The AcquiSuite A8812 responds with Error 11: Resource Temporarily Unavailable.

Product Line

TAC I/A Series

Environment

Niagara G3 / R2

Cause

The AcquiSuite A8812 internal I/O module (Analog and Pulse inputs) uses Modbus address 250. This is not a legal address for a modbus slave device or ID. Valid Niagara addressing is from address 1 to 247 as stated in the Modbus protocol documentation.

Resolution

The Acquisuite Obvius LLC company offers a Flex I/O module that can be addressed between 1-247.