Method and system for the distributed storing of information in a plant of process automation having a plurality of field device

1. A method for a distributed storing of information in a plant of process automation having a plurality of field devices, comprising:

reading a first data bit sequence from a first field device and a second data bit sequence from a second field device, using a logic unit;

combining the first data bit sequence with at least the second data bit sequence using an XOR function executed by the logic unit to form a first check bit sequence, wherein in the first check bit sequence each position corresponds to an XOR operation of corresponding locations of the first data bit sequence and the second data bit sequence; and

storing the first check bit sequence in a third field device,

wherein the reading of data bit sequences, the combining of data bit sequences using an XOR function to form additional check bit sequences, and the storing of additional check bit sequences is repeated for additional field devices of the plurality of field devices, and

wherein a data bit sequence is contained in only one check bit sequence.

2. The method as claimed in claim 1 , wherein the first data bit sequence represents at least one parameter value of the first field device and the second data bit sequence represents at least one parameter value of the second field device.

3. The method as claimed in claim 1 ,

wherein the reading of data bit sequences, the combining of data bit sequences using an XOR function to form additional check bit sequences, and the storing of additional check bit sequences is repeated for additional data bit sequences in the first field device and in the second field device, and

wherein when storing the first and additional check bit sequences, check bit sequences that contain redundant data bit sequences are not stored.

4. The method as claimed in claim 1 , wherein the method steps are performed after a replacement of one of the field devices.

5. The method as claimed in claim 1 , wherein the method steps are performed after a parametering and/or a configuring of at least one of the field devices.

6. A method for a retrieval of distributed data, comprising:

reading with a logic unit a check bit sequence from a first field device, wherein the check bit sequence is a result of a bit-wise XOR operation of at least a first data bit sequence from a second field device and a second data bit sequence from a third field device;

reading with the logic unit the first data bit sequence from the second field device;

padding the first data bit sequence with 0 bits to a length of the check bit sequence if the first data bit sequence is shorter than the check bit sequence;

performing with the logic unit a bit-wise XOR operation of the first data bit sequence and the check bit sequence to produce the second data bit sequence;

storing with the logic unit the second data bit sequence in the third field device; and

converting the second data bit sequence in the third device to at least one parameter value in the third field device.

7. A system for a distributed storing of information, comprising:

a plurality of field devices, each of the plurality of field devices having a memory module embodied to store the field device's own data and to store at least one check bit sequence formed from data of the plurality of field devices; and

a logic unit including:

a read unit embodied to read a first data bit sequence from a first field device of the plurality of field devices and a second data bit sequence from a second field device of the plurality of field devices;

a computing unit embodied to combine the first data bit sequence with the second data bit sequence using an XOR function to form a first check bit sequence, wherein in the first check bit sequence each position corresponds to an XOR operation of corresponding locations of the first data bit sequence and the second data bit sequence; and

a transfer unit embodied to transfer the first check bit sequence to a third field device of the plurality of field devices,

wherein the reading of data bit sequences, the combining of data bit sequences using an XOR function to form additional check bit sequences, and the storing of additional check bit sequences is repeated for additional field devices of the plurality of field devices, and

wherein a data bit sequence is contained in only one check bit sequence.

8. The system as claimed in claim 7 , wherein the logic unit is located in at least one of the plurality of field devices.

9. The system as claimed in claim 7 , wherein the logic unit is disposed in a control plane of a plant, in a programmable logic control unit, or in a computer unit.

10. The system as claimed in claim 7 , wherein the field devices are connected for communication by a wired or wireless communication network.