Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral monitoring
Reexamination Certificate
2011-07-26
2011-07-26
Tsai, Henry W (Department: 2184)
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral monitoring
C710S014000, C714S042000
Reexamination Certificate
active
07987297
ABSTRACT:
An electrical field device has a microprocessor-controlled control device, a data memory which is inside the device and is connected to the control device via a first memory controller, and a data interface which is connected to the control device and is intended to connect external devices to the electrical field device. In order to ensure access to the data memory inside such a field device even when the control device or internal power supply device is not in working order, the data interface is connected to the data memory inside the device via a second memory controller. There is also disclosed a method for establishing a data link between a data interface of an electrical field device and a data memory inside the device.
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patent: 2006/0036897 (2006-02-01), Lin et al.
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Schwabe Stefan
Walz Stefan
Greenberg Laurence A.
Locher Ralph E.
Rhu Kris
Siemens Aktiengesellschaft
Stemer Werner H.
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