How does Rockwell PLC monitor analog values?

1. Select the analog module, and then right-click the-property to select the corresponding interface bit. For example, the number 1 in the figure is-10V in the upper right corner. Where to? 10V, 0-5V, 0- 10V, 0-20mA, we choose 0-20mA. The left scale (considering signal underflow, corresponding to 3-20ma) is-0.63 to 10, and the chart in Chapter 2 is MOV, and the actual value is obtained.

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Second, if there is no module calibration, such as FLEX series 1794-IE8 module. When the value of 0- 10V or 0-20mA is converted into the required value, it needs to be calculated by CPT instruction. The figure below describes the calculation of the maximum range 10 kg. The calculation formula is:

(6240) when the current engineering quantity is -4mA/20ma (24960)× maximum range (10).

Both PS:4mA and 20mA require you to give a default value in the label.

Finally, according to the situation of your host, I suspect that the sensor is damaged or the signal is broken halfway.