Productivity 1000 Series PLC Modbus RTU Serial Communication
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- čas přidán 18. 11. 2018
- The productivity series of PLCs comes with 4 built-in communication ports for easy connectivity to your PC or various industrial networks. Serial protocols like Modbus RTU can be utilized with either the RS232 or RS485 ports on this PLC. Modbus RTU is an open (published) protocol that uses the Master / Slave architecture. It’s a very common protocol used in industrial automation controls.
We will be using the RS485 (2-wire) port to communicate to a Solo Process Temperature Controller. Modbus RTU will be the protocol used on this serial communication media. The PLC will be the master and the Solo process temperature controller will be the slave. You will soon see how the Productivity Series of PLCs is the best way to handle communication with other devices. Let’s get started.
More information can be obtained on our website. This includes all of the links mentioned in this video.
accautomation.ca/productivity...
Here are some previous posts in this Productivity 1000 PLC Series. A full list can be obtained at the following location:
accautomation.ca/series/produ...
System Hardware
Installing the Software
Establishing Communication
First Program
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• Productivity 1000 Seri...
Documenting the Program
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Monitoring and Testing the Program
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Online Editing and Debug Mode
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Numbering Systems and Tag Database
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Contact and Coil Instructions
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Timer Instructions
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Counter Instructions
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Math Instructions
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Data Handling Instructions Part 1
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Data Handling Instructions Part 2
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Array Functions Part 1
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Array Functions Part 2
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Array Functions Part 3
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Program Control
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Drum Sequencer Instructions
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Data Logger
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Web Server
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There are several reasons why we are using the Productivity 1000 Series Controller. Here are just a few.
- 50MB user memory - Can handle very complex applications easily.
- 4 built-in communication ports - Easy connectivity to your network.
- Data logging up to 32 GB on a microSD card
- Add up to 8 IP modules to communicate to your field sensors. This will give you a total of 128 discrete IO points or 32 analog IO channels.
- Free Software and 30 days of free training with every CPU from Automation Direct.
- Interactive PLC Configuration Tool
- Tag Names
- Auto discovery IO - Physical I/O tags will be generated based on each module’s position in the base.
- I/O Modules have QR codes under the wiring cover. This can be scanned so you can have the latest specifications / wiring diagrams for the module.
- Limitless PID - Auto tuning - Individual or Cascade Mode - etc
- Web Server and Mobile Access
- Advanced Software instruction set
The Productivity 1000 series of programmable logic controllers currently has all of these features built into the P1-540 CPU.
This CPU (Central Processing Unit) are also known as MPU (Multi Processing Units) because of the communication capabilities.
www.accautomation.ca
So selfless, thanks for all the training mate. :-)
Hi Ray,
Thanks for the comment. It made my day!
Garry
These PLC’s are so awesome and affordable...you should have a jillion hits. Folks don’t know how economical and powerful these little controllers are! Good explanation. I have my 540 cpu talking modbus to little pic12f675’s and doing all kinds of things. Thanks, Garry!
This is one of my favorite PLCs. It is a finalist in the Plant Engineering’s 2018 Product of the Year Awards.
Communication is one of the P1000 abilities that I really like. Multiple read/writes can be done without the need for programming the timing.
Thanks for the comments, Bob.
Garry
Always AMAZING, GOOD JOB Garry
Thanks for the comment. It made my day!
Garry
Hi Garry, some question having no previous experience with a 485 serial bus, how long can a twisted pair be to reach a module? How many modules can I address successfully on this bus?
Hi Tom,
Good question. Typical Modbus RTU is RS-485 standard. 4000 feet (1200 meters) is generally accepted as maximum length. Remember that RS means recommended standard.
Regards,
Garry
hi garry, i have a productivity online but it doesn't give me communication with a cal control 3300 controller (addressing is 4X:29) since in a scada it does let me see it. I don't understand how you get the TAG :SOLO_PV in the video, do you create it first in the tagdatabase? do you put float, integer, etc? or there is no need to create it?.thanks for your help
Hi JMBR RP,
The tag SOLO_PV was created using the tag database. The PV value is a 16-bit register. This information comes from the Solo Manual.
cdn.automationdirect.com/static/manuals/solocontrolm/solocontrolm.html
I hope this helps you out.
Regards,
Garry
Here is the web post location for more details on the video.
accautomation.ca/productivity-1000-series-plc-modbus-rtu-serial-communication/
Regards,
Garry