公开(公告)号：WO1994029794A1

公开(公告)日：1994-12-22

申请号：PCT/US1993005773

申请日：1993-06-16

Applicant: HONEYWELL INC.

Inventor： HONEYWELL INC. ,  BARTELS, James, I.

IPC: G06F11/00

CPC classification number: G06F11/0796 ,  G06F11/0763 ,  G06F11/22

Abstract: A safety circuit for monitoring computer hardware that can create an unsafe condition if a failure occurs. The circuit includes a microprocessor, a keyword decoder, and a dynamic safety relay drive circuit. The microprocessor runs a set of internal tests which create a keyword made up of a series of bits. A particular series of bits indicates the desired operation of the microprocessor. On alternate generations of the keyword one bit in the series is inverted. The keyword decoder receives the keywords and outputs a "true" signal if the keyword indicates the desired operation of the microprocessor, and "false" signal if the keyword indicates otherwise. The output of the keyword decoder is transmitted to the dynamic safety relay drive circuit, and this signal will keep the circuit energized as long as its alternating. The position of the bit which is inverted is rotated through the keyword so that different bit paths through the keyword decoder may be tested.

Abstract translation: 用于监控计算机硬件的安全电路，如果发生故障，可能会产生不安全的状况。 电路包括微处理器，关键词解码器和动态安全继电器驱动电路。 微处理器运行一组内部测试，创建一系列由一系列位组成的关键字。 特定的位系列指示微处理器的期望操作。 在关键字的替代世代中，系列中的一位被倒置。 如果关键字指示微处理器的期望操作，关键字解码器接收关键字并输出“真”信号，如果关键字表示否则则输出“假”信号。 关键词解码器的输出被传送到动态安全继电器驱动电路，并且该信号将保持电路只要交替地通电。 反转的位的位置通过关键字旋转，使得可以测试通过关键字解码器的不同的位路径。

公开(公告)号：EP0704074B1

公开(公告)日：1997-07-23

申请号：EP93916571.8

申请日：1993-06-16

Applicant: HONEYWELL INC.

Inventor： BARTELS, James, I.

IPC: G06F11/00 ,  G05B9/02 ,  F23N5/24 ,  F23N5/20

CPC classification number: G06F11/0796 ,  G06F11/0763 ,  G06F11/22

Abstract: A safety circuit for monitoring computer hardware that can create an unsafe condition if a failure occurs. The circuit includes a microprocessor, a keyword decoder, and a dynamic safety relay drive circuit. The microprocessor runs a set of internal tests which create a keyword made up of a series of bits. A particular series of bits indicates the desired operation of the microprocessor. On alternate generations of the keyword one bit in the series is inverted. The keyword decoder receives the keywords and outputs a 'true' signal if the keyword indicates the desired operation of the microprocessor, and 'false' signal if the keyword indicates otherwise. The output of the keyword decoder is transmitted to the dynamic safety relay drive circuit, and this signal will keep the circuit energized as long as its alternating. The position of the bit which is inverted is rotated through the keyword so that different bit paths through the keyword decoder may be tested.

Abstract translation: 用于监控计算机硬件的安全电路，如果发生故障，可能会产生不安全的状况。 电路包括微处理器，关键词解码器和动态安全继电器驱动电路。 微处理器运行一组内部测试，创建一系列由一系列位组成的关键字。 特定的位系列指示微处理器的期望操作。 在关键字的替代代中，系列中的一位被反转。 如果关键字指示微处理器的期望操作，则关键字解码器接收关键字并输出“真”信号，如果关键字表示否则则输出“假”信号。 关键字解码器的输出被传送到动态安全继电器驱动电路，并且该信号将保持电路只要交替地通电。 反转的位的位置通过关键字旋转，使得可以测试通过关键字解码器的不同的位路径。

公开(公告)号：EP0704074A1

公开(公告)日：1996-04-03

申请号：EP93916571.0

申请日：1993-06-16

Applicant: HONEYWELL INC.

Inventor： BARTELS, James, I.

IPC: G06F11

CPC classification number: G06F11/0796 ,  G06F11/0763 ,  G06F11/22

Abstract: A safety circuit for monitoring computer hardware that can create an unsafe condition if a failure occurs. The circuit includes a microprocessor, a keyword decoder, and a dynamic safety relay drive circuit. The microprocessor runs a set of internal tests which create a keyword made up of a series of bits. A particular series of bits indicates the desired operation of the microprocessor. On alternate generations of the keyword one bit in the series is inverted. The keyword decoder receives the keywords and outputs a "true" signal if the keyword indicates the desired operation of the microprocessor, and "false" signal if the keyword indicates otherwise. The output of the keyword decoder is transmitted to the dynamic safety relay drive circuit, and this signal will keep the circuit energized as long as its alternating. The position of the bit which is inverted is rotated through the keyword so that different bit paths through the keyword decoder may be tested.