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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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Posted: 2026-06-04 08:08 PM
i have a project that require a converter to read from VRV air conditioner BACnet MS/TP in a highrise building. and send the status of the VRV using BACnet IP.
can we used M172 to solve this?
David Chen
Tri Mitra Otomasi
IAD Certified (Indonesia)
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Posted: 2026-06-09 12:28 AM
Hello,
fw .17 includes some BACnet client functionalities which allows to read/write object properties:
But BACnet IP and MS/TP can be active at the same time.
You will need 2 TM172:
TM172 A: BACnet/IP + Modbus client of TM172 B (Tcp or rtu)
TM172 B: BACnet MS/TP + Modbus server of TM172 A (Tcp or rtu)
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Posted: 2026-06-09 12:28 AM
Hello,
fw .17 includes some BACnet client functionalities which allows to read/write object properties:
But BACnet IP and MS/TP can be active at the same time.
You will need 2 TM172:
TM172 A: BACnet/IP + Modbus client of TM172 B (Tcp or rtu)
TM172 B: BACnet MS/TP + Modbus server of TM172 A (Tcp or rtu)
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Posted: 2026-06-09 03:31 AM
hi, do you mean i have to DOWNGRADE my M172 firmware to 17?
can you share the firmware file here? or email to my email:
david.chen@trimitraotomasi.com
engineer@trimitraotomasi.com
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Posted: 2026-06-09 11:31 PM
Hi,
it is not a downgrade, the latest fw for TM172 28/42 IOs is 596.17, the latest for TM172 7/18 IOs is 668.17.
They come with Ecostruxure Machine Expert HVAC 1.10 available on SE website
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Posted: 2026-06-10 04:00 AM
Hello,
what are the changes for client mode?? is an additional communication module needed??
because I read in the ecostruxure machine expert - HVAC- Operating Guide, the protocol supported is bacnet MSTP (Server) and bacnet IP (Server)
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