I am dealing with a project to control a VFD altivar 312 with a V130-33-T2.
It is my first time with a PLC, have choosed unitronics, because I think that it is a great piece of equipment with a good cost.
My problem is that I do not understand how to read a register from the VFD;
I want to read ETA status word (W3201), it is a 16 bit register. Every bit gives the most important information on the current status of the VFD. Then I will use these bits to perform a check, give information on the display, and make decisions.
Reading the projects examples, I understand how to configure the V130 as a Master.
Understand how to enable the port com and how to enable the modbus.
But do not understand how do I have to read the register.
I have done the following:
Slave ID 3
Slave start of vector 3201
Read: vector lenght 1
Master: Start of vector MB100
Status messages MI0
Total sessions DW0
And this is what I do not understand, the 16 bits will be stored in MB100 as an integer decimal number, or every bit will be stored in MB100, MB101,...,MB115?
Thanks a lot for your answers, the learning curve is hard in the beginnings.