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HVAC and Pumping Forum

Support Forum for HVAC and pumping machines, Modicon M17x and EcoStruxure Machine Expert HVAC software for chillers, AHU, CRAC units for datacenters or process chillers applications - from design, implementation to troubleshooting and more, by Schneider Electric.

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HVAC & Pumping Forum: Formerly known as Machine Automation Forum, this community has been re-launched to provide a more focused platform for professionals in the HVAC and Pumping industry. Join us to enhance your knowledge, share insights, and ask questions with the HVAC & Pumping community.



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HVAC and Pumping Forum

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BZ
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Virtual Training Calendar for Machine Automation

Hello everyone, We would like to highlight that there are some available seats for Virtual Classes in Q3 of Y2025 in our Machine Automation training team as below, come and join us!!! EcoStruxure...
Industrial Automation icon_circle HVAC and Pumping Forum
989 2 0

2024-01-25

iwave_ro
/html/rank_icons/Ensign.png iwave_ro

SpaceLogic TC900 thermostat write register FC06 with Modbus Modicon M1...

Hello, How can I write some modbus register (eg: setpoint) to the thermostat TC903 using function code 06 with M172 using EcoStruxure™ Machine Expert - HVAC version 1.7?The PLC writes using function co...
Industrial Automation icon_circle HVAC and Pumping Forum
6 0 0

2025-10-22

tfmt100
/html/rank_icons/Crewman.png tfmt100

M172 Webserver Maximum Connections

Hello! I couldnt find anywhere, the maximum simultaneous possible connections to M172 Webserver? It gets somehow slow or lagging if there's too many?Another question, has anybody tested M172SIG on thir...
Industrial Automation icon_circle HVAC and Pumping Forum
2 0 0

2025-10-21

Solved
Jacek_S
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M172 - Modbus RTU + Saving to EEPROM

Hello everyone, I have a topic related to the integration of Carel HMI panels and a Modicon M172 PLC.Currently, the communication between the PLC and the Basic HMI panel is done via Modbus RTU. What I ...
Industrial Automation icon_circle HVAC and Pumping Forum
271 0 4
Latest Reply: sammum

Informational
FedericoM
/html/rank_icons/Captain.png FedericoM /html/rank_icons/SE-Employee.png

Announcement: Application Addons Function & Function Block Library for...

Dear Community Members, We are excited to share another library of functions and function blocks designed to streamline development in HVAC and Pumping projects. Application Addons library ...
Industrial Automation icon_circle HVAC and Pumping Forum
140 1 1
Latest Reply: StevenCho

Solved
JDHALLUIN
JDHALLUIN

TCP/IP M172 connection with aveva scada

Hello, I'm a novice in M172 development, I develop a program with a TM172PDG42SI. I fill all IP adress in PLC. I have a dedicated WLAN network with all PLC in my site (most of them are M340). The pro...
Industrial Automation icon_circle HVAC and Pumping Forum
240 0 3
Latest Reply: sesa103402

Solved
obscuresc
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Do the M172* PLCs have data stored on board that can be used to identi...

There was a batch of PLCs that we handled a while ago that caused an display flicker issue. The advice at the time was to refer to the serial number of the PLC, located on the box or on the sticker. ...
Industrial Automation icon_circle HVAC and Pumping Forum
357 0 7
Latest Reply: FedericoM

Solved
obscuresc
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M172* structured text version control using git

Hi, I have been using git for version control when developing M172PDG18R software. I would like to be able to branch and merge versions. Here is my '.gitattributes' file, set so git can effectively d...
Industrial Automation icon_circle HVAC and Pumping Forum
349 0 5
Latest Reply: FedericoM

Solved
MacsEngineer
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M172 Keeps Missing Analogue Input 7

We have 4 induction loop detectors in our control panels, each with 2 NO outputs; one output closes while the induction loop is detecting an object, the other output gives a single pulse of maybe 100ms...
Industrial Automation icon_circle HVAC and Pumping Forum
259 0 4
Latest Reply: FedericoM

Solved
kor
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Machine Expert HVAC - problem with expansion modules variable list

On all workstation with ME HVAC we have, after upgrade from version 1.6 to 1.7 will arise a problem with access to possibility setup of expansion modules configuration variables. With all previous rele...
Industrial Automation icon_circle HVAC and Pumping Forum
2170 0 10
Latest Reply: FedericoM

Solved
RichB
/html/rank_icons/Crewman.png RichB

Machine Expert HVAC - Setting a BOOL from an HMI screen

Hello, I have (analog) variables configured in the "Programming" tab that are accessible, displayed and modified on the screens in "Display" tab, and these all work fine. I need to toggle a BOOL vari...
Industrial Automation icon_circle HVAC and Pumping Forum
296 0 4
Latest Reply: RichB

Solved
MacsEngineer
/html/rank_icons/Crewman.png MacsEngineer

How to set up time controlled operations on the M172?

I need to set up time controlled operations in a new program using the M172 PLC. We use Ewon Netbiter to give our clients an online system where they can set the date and time for when these operations...
Industrial Automation icon_circle HVAC and Pumping Forum
433 0 6
Latest Reply: MacsEngineer

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