US3784801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data handling system error and fault detecting and discriminating maintenance arrangement
Assignee: AG Communication Systems Corp
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Filing: 1972-07-12
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Granted: 1974-01-08
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Expires: 1992-07-12
Abstract
Abstract A maintenance arrangement responds to a false signal condition, produced by a data handling system, by recycling the timing generator controlling the data handling system to cause the signals in question to be repeated. In order to determine whether the false signal condition occurred only momentarily or remains present during the recycle operation, two types of detecting circuits are provided. Error detecting circuits respond if the false signal condition has a single occurrence, and does not remain present during the recycle operation and thus is interpreted as an error condition caused by the spurious introduction of noise pulses or the like, and fault detecting circuits respond if the false signal condition continues to be present or reappearing during the recycle operation to indicate a fault condition and to request other equipment to service the data handling system. Also, the maintenance arrangement designates the group of signals resulting in the false signal condition by storing group-identifying information in the memory of the data handling system so that the servicing equipment can determine the source of the problem. A register of the data handling system storing information relating to the group of signals resulting in the false condition is inhibited from being altered by the maintenance arrangement, which sets a freeze indicator in such a register so that all other information stored therein is preserved for use by the servicing equipment.
Inventors
- 👤 J Caputo
- 👤 F Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:29
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0766; G06F11/0772; G06F11/0706; G06F11/0748; H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54575; H04Q3/54591
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
173 words
A maintenance arrangement for a data handling system producing data handling signals, servicing equipment being associated with said system for diagnostic purposes; wherein said data handling system includes memory means, a plurality of registers sharing control logic circuits on a time division multiplex basis, said memory means including sets of storage elements, said plurality of registers each including a block of said storage elements, said data handling signals comprising a plurality of groups of said data handling signals, each one of said groups being individually associated with each one of said registers; said arrangement comprising: recycling means responsive to a false signal condition occurring among said data handling signals for causing said data handling system to reproduce said data handling signals; error detecting means responsive to the absence of said false signal condition recurring among said reproduced data handling signals for designating an error condition; nd fault detecting means responsive to said false signal condition recurring among said reproduced data handling signals for designating a fault condition and for requesting said servicing equipment.
Claim 2
Dependent Claim
173 words
A maintenance arrangement for a data handling system producing data handling signals, servicing equipment being associated with said system for diagnostic purposes; wherein said data handling system includes memory means, a plurality of registers sharing control logic circuits on a time division multiplex basis, said memory means including sets of storage elements, said plurality of registers each including a block of said storage elements, said data handling signals comprising a plurality of groups of said data handling signals, each one of said groups being individually associated with each one of said registers; said arrangement comprising: recycling means responsive to a false signal condition occurring among said data handling signals for causing said data handling system to reproduce said data handling signals; error detecting means responsive to the absence of said false signal condition recurring among said reproduced data handling signals for designating an error condition; nd fault detecting means responsive to said false signal condition recurring among said reproduced data handling signals for designating a fault condition and for requesting said servicing equipment.
Claim 3
Dependent Claim
34 words
An arrangement according to claim 1, wherein said error detecting means causes an error count request interrupt signal to be supplied to said servicing equipment for counting purposes in response to an error condition.
Claim 4
Dependent Claim
44 words
An arrangement according to claim 2, wherein said error detecting means includes means to store error count word information in said memory means, said error count word information designating one of said registers with data handling signals among which occurred said false signal condition.
Claim 5
Dependent Claim
66 words
An arrangement according to claim 3, wherein said data handling system comprises a pair of data handlers operating in synchronism and producing pairs of duplicated data handling signals, comparing means for generating a mismatch signal indicative of a disagreement between the signals of a pair of said data handling signals to cause said recycling means to initiate its operation, said disagreement being said false signal condition.
Claim 6
Dependent Claim
17 words
An arrangement according to claim 4, wherein said error detecting means comprises a write error latch circuit.
Claim 7
Dependent Claim
33 words
An arrangement according to claim 4, wherein said fault detecting means causes a fault interrupt signal to be supplied to said servicing equipment for requesting service therefrom in response to a fault condition.
Claim 8
Dependent Claim
41 words
An arrangement according to claim 6, wherein said fault detecting means causes snapshot information to be conveyed to said memory means for storage therein, said snapshot information designating a group of data handling signals among which occurred said false signal condition.
Claim 9
Dependent Claim
15 words
An arrangement according to claim 7, wherein said snapshot information identifies one of said registers.
Claim 10
Dependent Claim
17 words
An arrangement according to claim 8, wherein said fault detecting means comprises a snapshot request latch circuit.
Claim 11
Dependent Claim
42 words
An arrangement according to claim 9, further including logic circuit means responsive to a fault condition for generating a freeze bit signal to prevent information from changing in one of said registers associated with data handling signals causing said false signal condition.
Claim 12
Dependent Claim
24 words
An arrangement according to claim 10, wherein said logic circuit means includes means responsive to said servicing equipment for generating alternatively said freeze bit.
Claim 13
Dependent Claim
33 words
An arrangement according to claim 1, wherein said fault detecting means causes a fault interrupt signal to be supplied to said servicing equipment for requesting service therefrom in response to a fault condition.
Claim 14
Dependent Claim
42 words
An arrangement according to claim 1, further including logic circuit means responsive to a fault condition for generating a freeze bit signal to prevent information from changing in one of said registers associated with data handling signals causing said false signal condition.
Claim 15
Dependent Claim
22 words
An arrangement according to claim 13, wherein said logic circuit means responds to said servicing equipment for generating alternatively said freeze bit.
Claim 16
Dependent Claim
66 words
An arrangement according to claim 1, wherein said data handling system comprises a pair of data handlers operating in synchronism and producing pairs of duplicated data handling signals, comparing means for generating a mismatch signal indicative of a disagreement between the signals of a pair of sad data handling signals to cause said recycling means to initiate its operation, said disagreement being said false signal condition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |