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US 7,624,219 B2Granted
Bus node
AssigneeIfm Electronic GmbH
InventorsBernd Fuessl, Thomas Riehm, Peter Schoepe
Life of this patent
Estimating the term…
Abstract
The present invention relates to an apparatus for connection to a communication bus, in particular an apparatus for encoding the status of several emergency devices for communication across an AS-interface. A data code indicative of a collective state of one or more subsets of the emergency devices is communicated during cyclic communication from the slave to the master whereas information indicative of the individual states of the emergency devices is communicated during acyclic communication from the slave to the master.
Claims24
A bus node circuit comprising:
- a coding circuit that receives a plurality of substantially binary input signals and outputs a first output signal and a plurality of other output signals;
- and
- a bus interface circuit having a first data input terminal and a plurality of parameter input terminals, said first data input terminal being connected to said coding circuit to receive said first output signal, and each of said plurality of parameter input terminals being connected to said coding circuit to receive a respective one of said plurality of other output signals, wherein
- said plurality of substantially binary input signals comprises a first predetermined subset comprising at least two substantially binary input signals, said first output signal having a first binary state if each substantially binary input signal of said first predetermined subset exhibits a respectively predetermined binary state,
- each of said plurality of other output signals has a binary state indicative of a binary state of a respective one of said substantially binary input signals,
- said bus interface circuit outputs a plurality of bus signals compliant with European standard EN 50295 or IEC Standard 62026-2, said plurality of bus signals including a data code representative of said first output signal and a parameter code representative of said plurality of other output signals.
3 more elements
A bus node for connection to a bus, comprising:
- a coding and interface circuit that receives a plurality of substantially binary input signals and outputs a plurality of bus signals compliant with European standard EN 50295 or IEC Standard 62026-2, said bus signals including a data code signal and a parameter code signal, wherein
- said data code signal is representative of a collective state of two or more of said substantially binary input signals, and
- said parameter code signal is representative of an individual state of each of said substantially binary input signals.
A system comprising:
- a plurality of emergency switches, each respective one of said emergency switches configured and adapted to generate a signal indicative of an open/closed state of said respective one emergency switch;
- a coding and interface circuit configured and adapted to receive said signal from each of said plurality of emergency switches and to output a plurality of bus signals compliant with European standard EN 50295 or IEC Standard 62026-2, said bus signals including a data code signal and a parameter code signal, wherein
- said data code signal is representative of a collective state of said plurality of emergency switches, and
- said parameter code signal is representative of an individual state of each of said plurality of emergency switches.
1 more element
A method comprising the steps of:
- generating, with respect to each respective one of a plurality of emergency switches, a signal indicative of an open/closed state of said respective one of said plurality of emergency switches;
- receiving each said signal and outputting, based on said received signals, a plurality of bus signals compliant with European standard EN 50295 or IEC Standard 62026-2, said bus signals including a data code signal and a parameter code signal, wherein
- said data code signal is representative of a collective state of said plurality of emergency switches, and
- said parameter code signal is representative of an individual state of each of said plurality of emergency switches.
1 more element
A bus node comprising:
- a code generator that outputs at least one pair of code bits;
- a coding circuit that receives said at least one pair of code bits and at least two substantially binary input signal and that outputs at least two data output signals and a plurality of parameter output signals;
- and
- a bus interface circuit connected to said coding circuit to receive a plurality of signals including said at least two data output signals and said plurality of parameter output signals and that outputs one or more bus signals based on said received plurality of signals, wherein said coding circuit has a first sub-circuit that outputs a first data output signal of said at least two data output signals based on one code bit of said at least one pair of code bits and said at least two substantially binary input signals, and
- said coding circuit has a second sub-circuit, distinct from said first sub-circuit, that outputs a second data output signal of said at least two data output signals based on another code bits of said at least one pair of code bits and said at least two substantially binary input signals.
2 more elements
Dependencies are inferred from the claim text.