PLC Programming | CompactLogix 1769-IF8 Analog Input Module RSLogix 5000 Configuration Tutorial

Описание: PLC Programming | CompactLogix 1769-IF8 Analog Input Module RSLogix 5000 Configuration tutorial

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Although Analog devices are slowly being phased away by those with embedded & EtherNet capabilities, a lot of them are still present in the field and are being developed by Original Equipment Manufacturers (OEMs). Knowing how to integrate these devices into a plant control system is an important aspect of working with PLC Programming & automating certain equipment. Analog devices can be used to measure distance, flow, pressure, speed, rotation, weight and more.

The CompactLogix platform provides an excellent way of integrating such devices into a controller from the 1769 family. The module can receive & process up to 8 analog signals which can be of voltage or current type. Furthermore, the module is fully configurable and allows for internal scaling without the use of any other instructions within the program. That being said, I don't always recommend this method as this makes it more challenging to maintain, move inputs around, etc.

In this tutorial, you will learn how to assemble the hardware and how to add the 1769-IF8 module into a program which is downloaded to a CompactLogix 1769-L24ER-QB1B processor.

The 1769 family hardware features a flexible backplane which allows external modules to be easily attached to the main controller. In this tutorial, our focus will be on the 1769-L24ER-QB1B Programmable Logic Controller and the 1769-IF8 module. Although the process is nearly the same for all other PLCs, make sure to read proper documentation as you may need an additional power supply, other modules, etc.

The 1769-L24ER-QB1B processor will only work with an end cap resistor which is purchased separately. This part is 1769-ECR for End Cap Resistor. Chances are, you have one on your PLC. Here's an image of this part:

You will find a tab on this part which can be easily pulled away from the main unit by a little plastic piece which has a lock on it. Make sure that the hardware is powered down as you perform this procedure. Removing the 1769-ECR will expose the backplane which we will be using for the 1769-IF8 module.
The 1769-IF module will be placed between the PLC and the ECR module. Slide it into the same position you removed the End Cap Resistor from and close the tab which makes the connection. Note that due to the size of this module, the tab is found on the top this time.

The last step in the process will be to re-install the End Cap Resistor onto the opposite side of the 1769-IF8 Analog Input module. Once again, the resistor is there to terminate the back-plane and allow the PLC to recognize the modules connected to it. In other words, it's necessary to have it in place.

Full Tutorial: TBD

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