{}

Our Brands

Impact-Company-Logo-English Black-01-177x54

Welcome to the Schneider Electric Website

Welcome to our website.

Search FAQs

You are currently viewing the content available in Vietnam. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.

What are the supported Modbus function codes of the M171 HVAC controller?



Issue:
M171 supported Modbus function codes


Product Line:
M171, EcoStruxure Machine Expert HVAC


Resolution:
Below is the list of supported Modbus function codes of Modicon M171’s Modbus RTU master
- Read Coils – Function 01 (0x01): reads one or more 1-bit read-write objects;
- Read Discrete Inputs – Function 02 (0x02): reads one or more 1-bit read-only objects;
- Read Holding Registers – Function 03 (0x03): reads one or more 16-bit read-write objects;
- Read Input Registers – Function 04 (0x04): reads one or more 16-bit read-only objects;
- Write Single Coil – Function 05 (0x05): writes a single 1-bit read-write object;
- Write Single Register – Function 06 (0x06): writes a single 16-bit read-write object;
- Write Multiple Coils – Function 15 (0x0F): writes one or more 1-bit read-write objects;
- Write Multiple Registers – Function 16 (0x10): writes one or more 16-bit readwrite objects

Schneider Electric Vietnam

Explore more
Range:
Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range: