Appendix B

B.1.2 Percent of FSR

This mode is used by setting bits 0 and 1 of the data format/checksum /integration time parameter to 01. The format used in Percent of FSR consists of a plus (+) or minus (-) sign followed by five decimal digits including a decimal point. The maximum possible resolution is 0.01% with the decimal point fixed.

Data are given as the ratio of the input signal to the full-scale range. Example 1

The input value is +2.0 V. The input module is configured for a range of ±5 V. The response to the Analog Data In command is as follows:

+040.00 (cr)

The full calibrated voltage range ranges from -100% to 100% as voltage input ranges are always bipolar. A ±5 V input would range

from-5V (-100%) to 5 V (100%).

In this example the input is represented by +40% of the full-scale range which equals to (+(40/100) x 5 V = +2.0 V) the actual input value.

Example 2

The input value is 652.5o C, and a type E thermocouple (0o C to 1000o C) is configured in the analog input module. The response to the Analog Data In command is:

+065.25 (cr)

The result shows that the value of the input (652.5o C) is 65.25% of the full-scale range (1000o C).

Thermocouple input ranges are always assumed to be bipolar with zero being the point of symmetry. This holds true regardless of the specified range of operation. For example, when we use a type J thermocouple (0o C to 760o C), 760o C corresponds to +100% and 0o C corresponds to 0%. Even if 0o C lies outside of the specified operation range for the thermocouple, zero will remain as the point of symmetry. For instance, a type B thermocouple is specified for operation from +500o C to +1800o C. In this case +1800o C corresponds to + 100% and 500o C corresponds to +27.77%.

Appendix B Data Formats and I/O Ranges B-3

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Advantech ADAM 4000 user manual Appendix B, Percent of FSR

ADAM 4000 specifications

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