I am looking to expand the voltage reading from the thermocouple module and translate it into a numerical value. In the past, I utilized a Micrologix 1400 (1766-L32AWAA) with a supplementary Thermocouple module (1762-IT4). In RS Logix, I accessed the input readings from I:1.1 and performed a Scaling (SCP) operation to convert it into a floating point value stored in F8:2. How can I achieve the same outcome using a Micro820 (2080-LC20-20QWB) and 2080-TC module? Is the SCL function the solution to this task?
After experimenting with the Micrologix to Micro800 converter tool, I discovered that it generates a specific function block known as RA_SCP.
Do you know how the 1762-IT4 was set up and what value is stored in the configuration data word? Was it specifically set up for Type K thermocouples and scaled for PID control?
Drbitboy inquired about the configuration of the 1762-IT4 module and the value stored in the configuration data word. Was it set up for Type K thermocouple and Scaled-for-PID operation? Find out more about Type K scaled for PID settings here.
User drbitboy inquired about the configuration of the 1762-IT4 module and the value in the configuration data word. Specifically, was it set up for Type K thermocouples and Scaled-for-PID operation? User gbradley confirmed that it was configured for Type K thermocouples scaled for PID, as seen in the attached image. To learn more, visit the link provided at the bottom of this page. Unfortunately, user gbradley is unable to offer further assistance regarding the 2080-TC module.
I utilized the SCP command within the Input/Output Menu for my task.
You're correct in considering using the SCL function as a possible solution. However, the Micro820 operates a bit differently from the Micrologix. In Connected Components Workbench, which is the Micro820's software, you don't perform scaling operations quite the same way. The input range is fixed by the module. So, for example, if your 2080-TC thermocouple module is reading at 0-20mA, the raw input would be scaled from 0-32000. To convert it to a floating point representation, look into using the 'REAL' data type for your variable. You can then use a simple math equation to map the raw input to your desired value range. That should yield a similar result to what you achieved with the SCP block in RS Logix.
Absolutely, the SCL function (scale with parameters) can be utilized to similar effect in a Micro820 environment. It's a standard function to read inputs and scale them to your desired floating point values. So, if you're comfortable with that approach, I'd say yes, that's your solution. One little tip though, in the Connected Components Workbench tool, which you probably use with Micro820, you'll find the SCL block under the Transform category in function block. That should help you navigate to the right area to start the scaling operation.
You're on the right track with using the SCL function. Unlike the Micrologix series, the Micro820 PLC uses Connected Component Workbench (CCW) software and in this, scaling is done a little differently. No worries, it's still pretty straightforward. First, create the scaled value as a REAL data type. Then, in your ladder logic, use the SCL instruction. Your source would be the analog input from the thermocouple module and the destination would be the REAL variable you created. Remember to set the appropriate raw/scaled limits. I hope this helps, best of luck with your project!
Yes, you're on the right track. The Micro820 does indeed utilize a scaling function similar to RS Logix. It's called Linear Scaling, aka the SCL function, and it operates much like the SCP function you're accustomed to. You can use the SCL function to convert the raw data from the TC module into meaningful temperature values. Just make sure to adjust the parameters appropriately to match your thermocouple type and desired scale. I'd recommend checking out the Rockwell Automation website for a detailed guide on using the SCL function, as they provide excellent resources for beginners and experienced users alike.
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Answer: - To convert thermocouple voltage readings into temperature using a Micro820 and 2080-TC module, you can utilize the SCL (Scale) function in RS Logix. This function allows you to scale the input readings into a numerical value.
Answer: - In the past with a Micrologix 1400 and Thermocouple module, you accessed the input readings and performed a Scaling (SCP) operation in RS Logix. With a Micro820 and 2080-TC module, you can achieve a similar outcome by utilizing the SCL function in RS Logix.
Answer: - Yes, you can access input readings from the 2080-TC module in a Micro820 PLC. By using the appropriate functions and operations in RS Logix, you can convert these readings into temperature values.
Answer: - Yes, the SCL function is a suitable solution for converting thermocouple voltage
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