If trying to communicate to a third party device via Modbus TCP and using a Quantum setup with Concept software, does the third party device have to support Modbus Plus in order to use the Master Block function in the ladder diagram? Thanks.

 

No
MODBUS plus and MODBUS TCP are totally different - at the physical (PHY) level, plus MODBUS PLUS is proprietary wheras the TCP kind is publicly documents.

Meir

 

No. The MSTR function can be used to initiate both Modbus Plus messages (via the NOM modules) and Modbus TCPIP messages (via the NOE modules). The setup in logic is slightly different for each message type but the same function block (MSTR) is used. The MSTR function block is the best for messages as it provides the best control features and is the only function block that has an "abort" control. In most cases, it is not necessary to schedule MSTR functions. They will all get serviced over time. The Quantum controller can support up to seven (7) seperate networks in the processor rack.

 

Your third party device have not to support Modbus Plus, it needs supports modbus or modbus tcp/ip only. If it support modbus, you can use a modbus to modbus tcp/ip bridge.