write custom applications for many customers who cannot find a software
solution and need help. This client needed to import several data
points from an SLC 5/05 PLC into a 3rd party SPC program. We created
this custom application program using Visual Basic 6.0.
The screen below shows the
interface screen that is used to set the communication parameters for
the 5/05 PLC. This project used our Allen Bradley Ethernet driver. This
driver offers connectivity to the latest Allen Bradley Ethernet enabled
automation controllers. The client needed the capability to adjust the
poll rate, the PLC registers, the quantity of registers and a trigger
bit from this screen.
The application polls the
5/05 controller at the poll rate and checks the trigger bit to see if
the bit is on. If the bit is on the application reads all the data
registers from the PLC and writes all the data to a text file on the
computer. The 3rd party SPC program reads the text file, imports the
data, and then deletes the text file. The PLC resets the trigger and we
only read the data when the trigger bit is turned on again. This
program runs in the background and requires very few computer
We are very good at
communicating with our clients to ensure all applications work as
required and can provide the source code if they want to support the
application. If you have any applications that you need help with
please contact us and we will be happy to provide a quote for you.