Search found 11 matches

by gambrinus
07 Jun 2018, 20:59
Forum: Hardware
Topic: Ethernet/IP Slave
Replies: 8
Views: 15108

Re: Ethernet/IP Slave

Thanks!
by gambrinus
05 Jun 2018, 17:21
Forum: Hardware
Topic: Ethernet/IP Slave
Replies: 8
Views: 15108

Re: Ethernet/IP Slave

Can the Ethernet/IP slave be used to communicate with an Allen Bradley Controllogix system as an Ethernet/IP master? This may seem like a silly question, but to my knowledge, there are subsets of the Ethernet/IP industrial protocol. I'm not certain that just because two devices support Ethernet/IP, ...
by gambrinus
25 May 2018, 16:36
Forum: Hardware
Topic: piBridge Protocol
Replies: 6
Views: 15006

Re: piBridge Protocol

Thanks Volker,
Is the RevPi Connect reverse compatible with RevPi core modules? Is there a blog post or other information I can read on the RevPi Connect?
by gambrinus
25 May 2018, 15:42
Forum: Hardware
Topic: piBridge Protocol
Replies: 6
Views: 15006

piBridge Protocol

Is there any documentation on the RS485 data exchange protocol? We are creating a custom module and are considering various ways to send data to the RevPi. We would like to use the piBridge if possible, but a serial over USB connection is seeming like the simplest solution. We are utilizing the RevP...
by gambrinus
02 May 2018, 14:11
Forum: RevPiModIO
Topic: Modbus
Replies: 4
Views: 8888

Re: Modbus

Thanks Volker! The OPC server we're using allows us to configure byte order, so no problems =). I was able to get the float decoded into a tag on the OPC server easily enough. I'm working on a custom RAP file now.
by gambrinus
01 May 2018, 18:13
Forum: RevPiModIO
Topic: Modbus
Replies: 4
Views: 8888

Re: Modbus

Thanks, I figured it out. To any user who may be interested, you just use revpimodio2.RevPiModIO(n) where n is the position of the Modbus TCP virtual device. In fact, you are not limited to words as the PiCtory app shows. Below is a functional example of how to write a float to an output that can be...
by gambrinus
19 Apr 2018, 12:43
Forum: RevPiModIO
Topic: Modbus
Replies: 4
Views: 8888

Modbus

Hello,

I was directed here by Volker. I need to know if the RevPiModIO python module supports reading and writing to virtual modbus registers?

Thanks!
by gambrinus
19 Apr 2018, 12:38
Forum: Software
Topic: Modbus
Replies: 6
Views: 7995

Re: Modbus

Thanks Volker! Certainly seems simple enough... I'll stop by Sven's forum.
by gambrinus
19 Apr 2018, 09:58
Forum: Software
Topic: Modbus
Replies: 6
Views: 7995

Re: Modbus

I see. Bit order in the processing image is little endian, but protocol will communicate it big endian. So to store a 32 bit float, I will need to write some code for handling it as 2 16 bit registers. That's not too difficult. Thank you for answering my questions. Sorry about the initial double-pos...
by gambrinus
18 Apr 2018, 19:52
Forum: Software
Topic: Modbus
Replies: 6
Views: 7995

Modbus Slave

I am considering purchasing a RevPi Core 3 for an automation project. For my project, I need the Pi to perform some basic IO, but also store floats in a tag for an OPC-UA server. After doing some research, it appears this is possible with Pictory Modbus Slave, but the examples do not make it clear i...