I have gotten good support from this forum to get a program to communicate over modbus rtu with a sensor (four-wire), which interface is modbus rs485. The sensor is connected to a Rs485/Usb converter and is connected to a PC. I want to add two or three sensors of the same type to this program. The slaves have different IDs and I want to read the same registers of slaves at the same time. How do I add a slave? And can I read the registers of for example the temperature with the same sample time?

LabVIEW

Multiple slaves

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The solution was to update the FW...
But I wonder how to write to more than one address in one shot, like in the attached image? The Write Multiple Reg.-function only sends one unsigned word to the address.

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LabVIEW

Multiple slaves

Re: Multiple slaves