Reading/writing discretes from 2 registers

[eosalex]

I'm using a proprietary PLC that stores 32 discrete inputs on modbus registers 30003-30004 (and outputs on 40003-40004). When I try to extract a discrete...

[JulesTop]

Hi,

It doesn't like there is a way to currently do this. I have hundreds of the same devices communicating on Modbus but with different Slave...

[jtkilroy]

Sorry for the NOOB question. I am having a great time working with the P1000 so far. I have run into sensor, an SICK OLM100 bar code reader, that I...

[jflores13]

Hi guys,

I'm trying to perform my first Modbus Serial read on an Accuenergy Energy Analyzer that has an RS485 port. I'm trying to use the...

[Lucas.Allen]

Good morning all,

I have been able o get communication to printer from PLC with static text:

"^XA~TA000~JSN^LT0^MNW^MTD^PON^PMN^LH0,0^JMA^PR5,5 ~SD15^JUS^LRN^CI0^XZ^XA^MMT^PW456^LL0253^LS0^FT405 ,216^A0I,28,28^FH\^FDMachine...

[djedesign1]

I have an application wherein I need to send ASCII control strings to external devices via a serial port. I thought the easy way would be to copy and...

[Lucas.Allen]

Hello all,

I am looking to do what I think should be a very simple process but I think I am just mentally burnt out and looking out to peers...

[Gudmundur Ben]

Hello, I just updated a broken D4-450 CPU with the new D4-454. After the replacement I'm not able to communicate with devices on Modbus RTU. I'm using...

[gersonm]

My PLC does not have the modem cable port to connect to. Is this possible? The modem cable has 6 connections but my PLC only has 3 connections for RS...

[bgirouard]

I'm working on a pet project in my "spare time" at work.

BACKGROUND
My first major control system uses (all stepper motors)...

[djedesign1]

I am getting warning and "This device cannot start. (Code 10)" in Device Manager for my EA-MG-PGM-CBL programming device for the C-More Micro....

[Garry]

I have just finished a blog post in which we have installed a USB-485M adapter. Here is some of the post... The USB-485M is a 2-wire USB to RS-485 s...

[SMortensen]

I am currently having issues getting the 260 and 05 to communicate. I have them networked through a pair of TransNET900s and the MRX & MWX messages seem...

[Mike@Forshock]

So we have tried many ways using many products. (modbus IAP devices) so we are reaching out to others in the field. We have a legacy system running an ...

[bgirouard]

Hi everyone, I'm playing with a Do More processor by sending commands to STP-DRV-4850. I'm trying to decide whether or not to have my program pro...