Technical FAQs

Ask a Question

What is the maximum number of word registers that we can be used in the M238 Modbus IO scanner.

For M238 controller,

Memory area 1 is dedicated to %IW (Input registers) and its limitation is up to 512 words.

Memory area 2 is dedicated to %QW (Output registers) and its limitation is up to 512 words.

So, maximum 512 words of %IW and maximum 512 words of %QW can be used in M238 Modbus IO scanner.

Attempt to use more than 512 words for %IW or 512 words for %QW will result in Build error while performing "BUILD ALL" .

Was this helpful?
What can we do to improve the information ?