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I build Automation Controls Toolbox. I made the analog-scaling tool fully usable without an account so you can enter the raw range your PLC channel actually uses.
For a simple example, a 4-20 mA transmitter spanning 0-100 PSI represents 50 PSI at 12 mA. The raw count that corresponds to that midpoint depends on the module and channel configuration. The tool keeps the raw endpoints and engineering range visible, shows the scaled value, and calculates the expected raw count for a target value.
Try it here:
automationcontrolstoolbox.com
The calculation stays in your browser. Please use a made-up example when discussing a result publicly, rather than plant or customer data. Check the exact module documentation and your site's procedure before applying anything to real equipment; arithmetic alone cannot establish loop health.
Disclosure: I operate the site. This calculator is complete and free. Optional paid plans add workbenches and field records, including a five-point calibration record; they are not required to use the linked calculator.
Is there a raw-count representation or range warning that you would want made clearer before using this for a check?
For a simple example, a 4-20 mA transmitter spanning 0-100 PSI represents 50 PSI at 12 mA. The raw count that corresponds to that midpoint depends on the module and channel configuration. The tool keeps the raw endpoints and engineering range visible, shows the scaled value, and calculates the expected raw count for a target value.
Try it here:
Free PLC Analog Scaling Calculator
Use your own raw-count range, see the engineering value and check clamping. Complete calculator and practice sheet; no account needed.
automationcontrolstoolbox.com
The calculation stays in your browser. Please use a made-up example when discussing a result publicly, rather than plant or customer data. Check the exact module documentation and your site's procedure before applying anything to real equipment; arithmetic alone cannot establish loop health.
Disclosure: I operate the site. This calculator is complete and free. Optional paid plans add workbenches and field records, including a five-point calibration record; they are not required to use the linked calculator.
Is there a raw-count representation or range warning that you would want made clearer before using this for a check?
