Search found 4 matches

by bmoeller
02 Aug 2021, 10:22
Forum: Software
Topic: Modbus change variable between virtual devices
Replies: 20
Views: 9395

Re: Modbus change variable between virtual devices

I have to correct myself. I thought I had a similar problem and the data I read via the RevPi connect (Modbus RTU) were not correct. Turns out that the problem was in the convertion from the 2 byte hex to integer decimal. The low and high byte was swapped around. at the same time the register addres...
by bmoeller
01 Aug 2021, 19:47
Forum: Software
Topic: Modbus change variable between virtual devices
Replies: 20
Views: 9395

Re: Modbus change variable between virtual devices

I would like to echo above. I seem to have a similar problem. We bought two RevPi Connect to use them in a project where we have to control two external cooling units. Reading register 202, which is a temperature reading we get a value that is completely of the actual value and despite the actual va...
by bmoeller
27 Jul 2021, 13:41
Forum: RevPi Nodes for Node-RED
Topic: RevPI connect - ModBus direct connect?
Replies: 1
Views: 4645

RevPI connect - ModBus direct connect?

Greetings, I have bought 2 pcs RevPI connect for a specific project and we are sonsidering a general use of the RevPI when we need added control features aside from our standard controller. The process setting up the virtual Modbus Master and get the the values into node red using the Exec Node and ...
by bmoeller
23 Jul 2021, 21:48
Forum: Hardware
Topic: Using Relay Contact on RevPi Connect
Replies: 1
Views: 1683

Re: Using Relay Contact on RevPi Connect

Thanks crismancich, This is good information and got me started to understand how it works. But for the revpi connect I think the table is one bit off. The correct value to to set a# to green and activate the realy is 16+64. At least this worked for me this way.