SU516033A1 - Multiplex channel with troubleshooting - Google Patents

Description

one

The invention relates to the field of computing and can be used in I / O channels and other devices with local memory.

There are known devices for malfunctioning faults, in which equipment is used, nahor, ui & eu outside it. I. Known multiplex channels contain a block, interface with the central processor, the first input and output of which are connected respectively to the first input and output of the channel, the subchannel register, the first input and output of which are connected respectively to the second output and to the second input of the interface block with the central processor, the interface unit with the central operational memory, the first input of which is connected to the second input of the channel, the first and second outputs, respectively, to the second and third outputs of the channel. In addition, the control register, the first input of which is connected to the third output of the interface unit with the central RAM, is entered into the known channels, the information register, the first input and output of which are connected to the third output and the second input of the interface module, respectively. Tue, a modification unit whose input is soi: 1inen with the output of the control register, an output with the third input of the interface unit with the central operative memory. The channels also include an interface unit with external devices, the first input and output of which are connected respectively to the third input and fourth output of the channel, the second input to the output of the subchannel register and the nerve output of the information register, the second output to the second input of the subchannel register and the second the input of the information register, the local memory unit. And whose address input is connected to the output of the subchannel register, the information input to the output of the modification unit and the second information register output, the output is connected to the third input register information and the second input of the control register. The channels also have a control unit, the first input of which is connected to the third output of the interface unit with external devices, the second input is connected to the information input and

the output of the local memory block and the second output of the information register, the sampling block of Aiagosms and information commands, the malfunction detection unit, the first output of which is connected to the fifth output of the channel. The microdiagnostics device in the known technical solutions contains a local mass storage unit of large capacity, in which a program of signals is stored that control and information words. Local Storage Block Signals

served on the control register and blocks of drives used to calculate logical processing of the main information. A disadvantage of the known solutions is the need for a special copyright block for storing diagnostic programs and information.

The purpose of the invention is to reduce the equipment dosage.

This is achieved by the fact that the multiilex channel contains a local memory operation control unit, the input of which is connected to the output of the control unit, the output to the control input of the venue memory unit, the input of the sampling unit of diagnostic comaids and information is connected to the output of the venue memory unit, and the output is with the first input of the malfunction detection unit, the second input of which is connected to the output of the control unit, the second output to the second input of the control unit.

Considering that the physical speed of performing operations during diagnostics is not the main factor, this makes it possible to execute in the multiplex channel a block of local memory according to the operating memory device (RAM) with a “hidden permanent memory” (ROM). The operational storage section is used to store programs and data subchannels, the permanent storage section is used to store diagnostic comaids (programs) and information. The switching of the RAM to the ROM and back is carried out according to the control signal (the "operation -" diagnostics mode).

The drawing shows a block diagram of a multiplex channel with fault diagnosis. It contains a block of 1 interface with a central processor, a block 2 of interface with a central operative memory, a subchannel register 3, a control register 4 that holds the security key, a channel control word address (data address), an opcode, a data count, block 5 modifications, modifying the address of the program (data) and data counting, information register 6, block 7 for retrieving diagnostic information commands, block 8 for determining the fault location, control block 9, local memory block 10. A local memory block consisting of an on-line storage section (OZS) and a persistent storage section (CCD) operates in a time division mode depending on the control signal or as a random access memory for data storing and control information of subchannels, or as a permanent memory device for storing diagnostic programs and information. In addition, the AND block of the mode of operation of the memory location and the block 12 of arguing with external devices are introduced into the circuit.

The multiplex channel in the computer system is connected using the following lines: transfer lines 13 of the nnstruktsin code, lines 14 for issuing an interruption of the condition code to the central processor of the 15 lines of the central operative telephone, input lines 16 and output lines 17 of the central memory, lines 18 of the I / O interface, lines 19 of the issuance of information defining the location of the fault of the multiplexed channel.

In the operating mode, the instructions “start pod / output enters into block 1 of the interface with

central processor. The address of the external device, received in the instruction code, is fixed in the register 3 of the subchannel and is further referred to in block 12 for interfacing with external devices. Block 12 provides a sequence of initial sampling of an external device. Simultaneously with this sequence, the block 2 of the interface with the central operative memory (CSC) reads the channel address word from the CCP fixed cell and then the control word dripped from this address. The information from the CSC is read by the register 4 of the control. The operation code from the register is given in bol 12 and further to the external device. The signal from the local memory operation control unit 11 switches the local storage unit 10 to the mode in which it is used as an operative memory storing data and control information of the subchannels.

The control information from register 4 is recorded in the operational storage part of the local memory in the zone assigned to the external device being serviced. Further

The I / O operation can be continued by the initiative of an external device, which in block 12 issues a service request and its address recorded on register 3. At this address, information is read from the operational memory of the local memory block 10 to information registers 4 and 6, Conductor to this device. In accordance with the read control information, the data bytes in the operation

"Write from register 6 and the information is sent through block 12 to the external device; during the operation," read the data bytes from block 12 are sent to register 6. After the complete word is formed (or sent

the external device is updated with the data address by block 5 and the write (read) data word to (from) the central random access memory. Unit 9 controls the transfer of information from the register to the register, the conversion of information and control circuits. When a fault is detected during the operation of a multiplex channel, unit 9 generates an error code that switches the multiplex channel to diagnostic mode. In this case, the error signal comes in

a local memory mode control unit 11. The signal from block 11 switches the iO block of the local memory to the read mode of information from the permanent memory section of the local memory. The CCD stores programs and troubleshooting information in specific areas of the multiplex channel control, determined by the type of error that is detected by unit 9 in the operating mode.

Diagnostic commands are read into sample block 7 of diagnostic instructions. The correctness of the sample is monitored. In the event of an error during sampling, the location of the malfunction is determined using blocks 9 and 8. The type of the next diagnostic program is determined by the type of error that occurred earlier. However, as a rule, the control circuits should be checked beforehand. The diagnostic program read from the CCD to block 7 defines certain actions in the multiplex channel, followed by the execution of which block 8 determines the location of the fault.

Claims (1)

Invention Formula A multiplexed fault diagnostics channel containing the interface unit with the central processor, the first input and output of which are connected respectively to the first input and output of the channel, the subchannel register, the first input and output of which are connected respectively to the second output and to the second input of the interface block processor, interface unit with central memory, the first input of which is connected to the second input of the channel, first and second. The outputs are connected to the second and third outputs of the channel, respectively , the control register, the first input of which is connected to the third output of the interface to the central RAM, the information register, the first input and output of which is connected to the third output and the second input of the interface, respectively, of the central RAM, the input connected to the output of the control register, the output is connected to the third input of the interface with the central operational memory, the interface unit with external devices, the first input and output of which are connected respectively to the third input and the fourth output of the channel; the second input is connected to the output of the subchannel register and the first output of the information register; the second output is connected to the second input of the register and the second input of the register information, the local memory block, whose address input is connected to the output of the subchannel register, the information input. is connected to the output of the modification block and the second output of the information register, the output is connected to the third input of the information register and the second input of the control register, the control unit, the first input of which is connected to the third output of the interface unit with external devices, the second input is connected to the information input and output of the local memory unit and the second output of the information register, the diagnostic command selection block and information, the fault location unit, the first output of which is connected to In order to reduce the equipment, it contains a control unit for the local memory operation mode, the input of which is connected to the output of the control unit, the output - to the control input of the local memory unit. ti, the input of the diagnostic instructions and information selection block is connected to the output of the local memory block, the output is connected to the first input of the malfunction detection unit, the second input which is connected to the output of the control unit, the second output is connected to the second input of the control unit. ..:.: .., , - .: ,,. . fS