HART Communication-Compatible Instrument
First Claim
1. A HART communication-compatible device having a HART communication function transmitting and receiving HART communication signals generated by superimposing a first signal and a second signal, comprising:
- a receiving portion receiving the HART communication signal;
a signal detecting portion detecting the second signal using the HART communication signal received by the receiving portion; and
an indicator portion indicating that the second signal has been detected, over the interval over which the second signal is detected by the signal detecting portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A HART communication-compatible device having a HART communication function for transmitting and receiving HART communication signals generated through superimposing an AC signal that is a combination of 1200 Hz and 2200 Hz frequency signals onto a DC signal of between 4 and 20 mA, including a receiving portion for receiving a HART communication signal, a signal detecting portion for detecting an AC signal of the HART communication signal using the HART communication signal received by the receiving portion; and an indicator portion for indicating, during the interval over which the AC signal is detected by the signal detecting portion, that an AC signal is detected.
3 Citations
7 Claims
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1. A HART communication-compatible device having a HART communication function transmitting and receiving HART communication signals generated by superimposing a first signal and a second signal, comprising:
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a receiving portion receiving the HART communication signal; a signal detecting portion detecting the second signal using the HART communication signal received by the receiving portion; and an indicator portion indicating that the second signal has been detected, over the interval over which the second signal is detected by the signal detecting portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification