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Electronic device with nonvolatile memory capable of writing data

An electronic device, non-volatile technology, applied in static memory, read-only memory, information storage, etc., can solve problems such as equipment failure

Inactive Publication Date: 2007-10-10
EHNDRESS KHAUZER GMBKH KO KG
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Problems solved by technology

This can lead to undesired equipment failure in extreme cases

Method used

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  • Electronic device with nonvolatile memory capable of writing data

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Embodiment Construction

[0024] The field device 1 of the invention is a measuring transmitter, for example a pressure measuring transmitter, comprising a main sensor 2 and, if required, a pre-amplifier, the analog signal of which is fed to a microprocessor 5 via an A / D converter 4 . The microprocessor 5 is also connected to a bus interface 6 and communicates via it with a fieldbus 3, for example the Foundation fieldbus.

[0025] The microprocessor is also connected to EEPROM 7, RAM 8 and ROM (not shown). In order to operate the measuring transducer, the microprocessor program stored in ROM is loaded into RAM 8 . Likewise, compensation coefficients for pressure sensors and other sensor and status data are read from EEPROM 7 and written into RAM 8 . In actual operation, the processor works with compensation parameters stored in RAM 8 as well as sensor and status data. The measured data average values ​​updated at defined time intervals are stored in the EEPROM 7 by write access. Additionally, eg mi...

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Abstract

An electronic device according to the present invention includes: a microprocessor; a non-volatile writable data memory that can be written to a predetermined maximum number of write accesses MSZ; characterized in that the device includes a counter that records write accesses, and The microprocessor generates an alarm signal depending on the development of the number of write accesses and, if necessary, on the maximum number of write accesses MSZ.

Description

technical field [0001] The invention relates to an electronic device with a non-volatile writable data memory, such as an EEPROM, in particular a field device with field device electronics and a writable data memory. The present invention and its prior art are explained below by taking field devices as an example. However, the invention is not limited to field devices. Background technique [0002] In process automation technology, field devices are preferably used to generate analog or digital measurement signals representing physical or chemical measurement variables of a process. [0003] Usually, such field devices are connected to each other and / or to a process control computer via corresponding data transmission systems (for example, 4-20 mA current loops and / or digital data buses), wherein the field devices send measurement signals to the process control computer. Especially used as data transmission systems are serial field bus systems, such as PROFIBUS-PA, FOUNDAT...

Claims

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Application Information

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IPC IPC(8): G11C16/34
CPCG11C16/349G06F11/076
Inventor 迈克尔·菲利普斯
Owner EHNDRESS KHAUZER GMBKH KO KG
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