Hello, I am using a ControlLogix system equipped with 1756-IF16 analogue inputs. I am unable to scale the inputs directly at the card as there is a need to adjust the scaling from the HMI interface. The configuration of the IF16 is set as follows: Communication Format: Integer Data Single-Ended Mode, Input Range: 0-20mA. Can you please provide the Raw Values output by the card at 4mA and 20mA? Unfortunately, this information does not seem to be documented anywhere.
To enhance scalability, consider using the module scaling feature to assign a numeric value ranging from 0 to 2000. Allow the module to take care of this initial scaling process before implementing your own customizable scaling code accessible via the HMI. Does this approach seem sensible to you?
The default scaling for the card is set at %, with the channel data raw numbers being in floating point format. You have the flexibility to adjust the card scaling to reflect 0.0 = 0mA and 20.0 = 20mA, displaying these values on the screen. Additionally, you can utilize the SCP AOI and easily edit its tag members from the HMI for convenient runtime scaling.
Thank you for the feedback. I discovered that when 4mA is equal to -20030, and when 20mA is equal to 30921.
Rich0147 expressed his gratitude for the feedback received. Upon investigation, it was discovered that the values 4mA=-20030 and 20mA=30921 were not default settings. These values can be adjusted to be more user-friendly, or displayed as raw counts on the HMI. It is recommended to modify the values to simplify the user experience, eliminating the need to work with negative raw minimums. It is suggested to check the firmware version on the controller, as the version observed (31) included real numbers for the IF16 data values.
The integer mode does not support scaling. The raw scaling for 1756-if16 is as follows: 0mA = -32768 and 21mA = 32767. For more information, refer to page 31 of the user manual.
Hello, since you've configured your 1756-IF16 analog input for a 0-20mA range in a single-ended mode using integer data, the raw values correlate linearly with the 0-20mA input signals. Considering that the full scale integer range for this card is from 0 (at 0mA) to 32767 (at 20mA), you can work out the raw values for any input signal in between. Specifically, at 4mA your raw count should be approximately 6554 (i.e., 32767 * 4 / 20) and at 20mA, it should be the maximum, 32767. Please remember these values are approximations due to possible fluctuations and conversions within the system. Always cross-verify your values with the actual current to avoid discrepancies.
I believe the raw values based on your configuration are quite standard for this type of setup. For a ControlLogix system with 1756-IF16 analogue inputs and your given Input Range of 0-20mA, the ControlLogix IO cards typically read 4-20mA inputs as 6550-32767 respectively in raw counts. So, you can consider 6550 as the raw value for 4mA, and 32767 for 20mA. Remember to consider any possible module or system specific deviations. You usually conduct a calibration to ensure the accuracy of these values.
The ControlLogix 1756-IF16 Input card scales 4-20 mA signals to a range of 3277-16384. Therefore, with your current configuration, the raw value given by the system should be around 8192 for an input of 4mA, and 16384 for an input of 20mA. However, keep in mind that these values might change slightly depending on your actual setup, so it's always a good idea to calibrate your system based on reliable mA sources before implementing this calculation.
Hey there! For the 1756-IF16 configured for a 0-20mA input range, the raw values typically correspond to specific ranges based on the resolution of the ADC. When you input 4mA, you can expect a raw value around 819, depending on internal calibrations, and at 20mA, it should be around 4095 if we're assuming a 12-bit representation. Since you need to handle scaling on the HMI side, you might want to use these raw values to create a formula for your scaling adjustments. Hope that helps!
Hi! For a 1756-IF16 module configured for a 0-20 mA input range, the raw values you’ll see depend on how the card interprets the input signal. Generally, at 4 mA, you would expect a raw value approximately around 819 for integer representation, and at 20 mA, it should be close to 4095. Just remember these values can vary slightly based on how your system interprets scaling and the configuration, so it’s always a good idea to double-check the card specifications in your setup or test it directly for the most accurate numbers. Hope this helps!
Hey there! While I don't have the exact raw values at hand, I can share that for a typical 0-20 mA range using an integer format in a ControlLogix system, the raw value at 4 mA is usually around 3277, and at 20 mA, it should be around 16384. This could vary slightly depending on your specific setup, so it’s always a good idea to verify with a quick test if you can. You might also find it helpful to look into the scaling function in your HMI to adjust those values dynamically. Hope this helps!
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Answer: Answer: To scale analogue inputs without direct documentation, you can adjust the scaling from the HMI interface instead of at the card itself.
Answer: Answer: The Communication Format is set as Integer Data Single-Ended Mode, and the Input Range is 0-20mA.
Answer: Answer: Unfortunately, the raw values output by the card at 4mA and 20mA are not documented.
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