Patent DE635094C successfully refreshed from Google Patents.
Patent EP0314190A2 successfully refreshed from Google Patents.
EP0314190A2
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EP
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Sequence control system and its method
Assignee: Nissan Motor Co Ltd
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Filing: 1988-10-31
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Granted: —
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Expires: 2008-10-31
Abstract
Abstract To facilitate program control modification and troubleshooting in sequence control system in spite of simple processing programs, sequence control processes are linked in a chain fashion. A unit process for activating an actuation member in both forward and reverse directions forms a ring so as to be activated in sequence cyclically, and these unit process rings are linked between an actuation start side activator for the present process and an actuation end side activator for the preceding process, both activated simultaneously whenever one of them is activated. Therefore, any process can be stopped at, restarted and reversed from any process steps in both the forward and reverse directions through the linked actuation start and end side activators, after the automatic operation has been switched to the manual operation or vice versa.
Inventors
- 👤 Masayuki Onodera
- 👤 Tatsuo Naito
- 👤 Hisashi Kubota
- 👤 Takayuki Kawakami
- 👤 Takatoshi Ito
- 👤 Kei Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:54
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/05
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
257 words
A sequence control system for controlling a plurality of processes in sequence, each process being achieved by actuating an actuation member in both forward and reverse directions, which comprises: (a) forward side executing means for executing a forward process by driving at least one actuation member in the forward direction; (b) forward side actuating means for actuating said forward side executing means; (c) forward side stopping means for stopping said forward side executing means; (d) reverse side executing means for executing a reverse process by driving the at least one actuation member in the reverse direction; (e) reverse side actuating means for actuating said reverse side executing means; (f) reverse side stopping means for stopping said reverse side executing means; (g) actuation start side activating means, coupled to said forward side actuating means and said reverse side stopping means and activated when said reverse side stopping means is turned on, for allowing said forward side executing means to be activated when said forward side actuating means is turned on under activated condition thereof; and (h) actuation end side activating means, coupled to said forward side stopping means and said reverse side actuating means and activated when said forward side stopping means is turned on, for allowing said reverse side executing means to be activated when said reverse side actuating means is turned on under activated condition thereof, said actuation start side activating means for the present process and said actuation end side activating means for the preceding process being activated simultaneously when one of both is activated.
Claim 2
Dependent Claim
257 words
A sequence control system for controlling a plurality of processes in sequence, each process being achieved by actuating an actuation member in both forward and reverse directions, which comprises: (a) forward side executing means for executing a forward process by driving at least one actuation member in the forward direction; (b) forward side actuating means for actuating said forward side executing means; (c) forward side stopping means for stopping said forward side executing means; (d) reverse side executing means for executing a reverse process by driving the at least one actuation member in the reverse direction; (e) reverse side actuating means for actuating said reverse side executing means; (f) reverse side stopping means for stopping said reverse side executing means; (g) actuation start side activating means, coupled to said forward side actuating means and said reverse side stopping means and activated when said reverse side stopping means is turned on, for allowing said forward side executing means to be activated when said forward side actuating means is turned on under activated condition thereof; and (h) actuation end side activating means, coupled to said forward side stopping means and said reverse side actuating means and activated when said forward side stopping means is turned on, for allowing said reverse side executing means to be activated when said reverse side actuating means is turned on under activated condition thereof, said actuation start side activating means for the present process and said actuation end side activating means for the preceding process being activated simultaneously when one of both is activated.
Claim 3
Dependent Claim
171 words
The sequence control system of claim 1, which further comprises: (a) means for half-activating said actuation end side activating means before executing said forward side executing means and returning said same actuation end side activating means to an activated condition only when said forward side stopping means is turned on, when said actuation end side activating means is kept half-activated due to trouble and further the reverse side actuation means is turned on, said forward side executing means being stopped and said reverse side executing means being actuated for repair; and (b) means for half-activating said actuation start side activating means before executing said reverse side executing means, and returning said same actuation start side activating means to an activated condition only when said reverse side stopping means is turned on, when said actuation start side activating means is kept half-activated due to trouble and further the forward side actuation means is turned on, said reverse side executing means being stopped and said forward side executing means being actuated for repair.
Claim 4
Dependent Claim
174 words
The sequence control system of claim 1, which further comprises: (a) forward side execution time measuring means T, activated when said forward side actuating means is turned on and deactivated when said forward side stopping means is turned on, for measuring a forward side processing time of said forward side executing means; (b) reverse side execution time measuring means T, activated when said reverse side actuating means is turned on and deactivated when said reverse side stopping means is turned on, for measuring a reverse side processing time of said reverse side executing means; (c) execution time storing means for storing reference forward and reverse side processing times of said forward and reverse side executing means, respectively; and (d) comparing means, coupled to said forward and reverse side time measuring means and said execution time storing means, for comparing forward and reverse processing times measured by said forward and reverse side time measuring means with reference forward and reverse side processing times, separately for checking whether said forward and reverse actuating means operate normally.
Claim 5
Dependent Claim
104 words
The sequence control system of claim 1, which further comprises: (a) present status storing means for storing present input data to the system; (b) reference status storing means for storing reference input data obtained when an object to be controlled operates normally; and (c) retrieving means, coupled to said present status and reference status storing means, for reading the present input data from said present status storing means and the reference input data from said reference status storing means when the object to be controlled is abnormal, and retrieving an abnormal input spot on the basis of difference in input data between the two.
Claim 6
Dependent Claim
64 words
The sequence control system of claim 1, which further comprises: (a) data reserving means for reserving data related to abnormal past spots, abnormal past step numbers, abnormal past input data, etc.; and (b) data analyzing means for analyzing an abnormal spot by comparing present input data with the data reserved in said data reserving means when an object to be controlled is operates abnormally.
Claim 7
Dependent Claim
174 words
A sequence control method, comprising the steps of: (a) checking whether actuation start side activating means (P1) for the present process is activated; (b) if activated, activating actuation end side activating means (P0) for the preceding process; (c) checking again whether the actuation start side activating means (P1) for the present process is activated; (d) if not activated, ending control; (e) if activated, checking whether forward side executing means can be activated (S1=1?); (f) if cannot be activated, repeating the above steps (c) to (e); (g) if can be activated, inactivating actuation end side activating means (P0) for the preceding process; (h) inactivating the actuation start side activating means (P1) for the present process; (i) executing forward side executing means (J1); (j) checking whether the forward side executing mean can be stopped (S2=1?); (k) if cannot be stopped, repeating the above steps (i) and (j); and (l) if can be stopped, activating actuation end side activating means (P2) for the present process and actuation start side activating means (P3) for the succeeding process, simultaneously.
Claim 8
Dependent Claim
174 words
A sequence control method, comprising the steps of: (a) checking whether actuation start side activating means (P1) for the present process is activated; (b) if activated, activating actuation end side activating means (P0) for the preceding process; (c) checking again whether the actuation start side activating means (P1) for the present process is activated; (d) if not activated, ending control; (e) if activated, checking whether forward side executing means can be activated (S1=1?); (f) if cannot be activated, repeating the above steps (c) to (e); (g) if can be activated, inactivating actuation end side activating means (P0) for the preceding process; (h) inactivating the actuation start side activating means (P1) for the present process; (i) executing forward side executing means (J1); (j) checking whether the forward side executing mean can be stopped (S2=1?); (k) if cannot be stopped, repeating the above steps (i) and (j); and (l) if can be stopped, activating actuation end side activating means (P2) for the present process and actuation start side activating means (P3) for the succeeding process, simultaneously.
Claim 9
Dependent Claim
179 words
A sequence control method of claim 6, which further comprises the steps of: (a) checking whether actuation end side activating means (P2) for the present process is activated; (b) if activated, activating actuation start side activating means (P3) for the succeeding process; (c) checking again whether the actuation end side activating means (P2) for the present process is activated; (d) if not activated, ending control; (e) if activated, checking whether reverse said executing means can be activated (S3=1?); (f) if cannot be activated, repeating the above steps (c) to (e); (g) if can be activated, inactivating actuation start side activating means (P3) for the succeeding process; (h) inactivating the actuation end side activating means (P2) for the present process; (i) executing reverse side executing means (T2); (j) checking whether the reverse side executing means can be stopped (S4=1?); (k) if cannot be stopped, repeating the above step (i) and (j); and (l) if can be stopped, activating actuation start side activating means (P1) for the present process and actuation start side activating means (P0) for the preceding process, simultaneously.
Claim 10
Dependent Claim
133 words
The sequence control method of claim 7, which further comprises the steps of: (a) half-activating the actuation end side activating means (P1b) for the present process after step (h) of claim 6; (b) executing forward side executing means (J1A); (c) checking whether the forward side executing means can be stopped (S1b=1?); (d) if cannot be stopped, repeating the above steps (b) and (c); (e) if can be stopped, activating the actuation end side activating means (P1b); (f) checking whether the actuation end side activating means (P1b) is still half-activated; (g) if still half activated, checking whether the reverse side actuating means can be actuated (S1c=1?); (h) if cannot be actuated, ending control; (i) if can be actuated, stopping the forward side executing means (J1A); and (j) returning to step (g) of claim 7.
Claim 11
Dependent Claim
133 words
The sequence control method of claim 7, which further comprises the steps of: (a) half-activating the actuation start side activating means (P1a) for the present process after step (h) of claim 7; (b) executing reverse side executing means (J1B); (c) checking whether the reverse side executing means can be stopped (S1d=1?); (d) if cannot be stopped, repeating the above steps (b) and (c); (e) if can be stopped, activating the actuation start side activating means (P1a); (f) checking whether the actuation start side activating means (P1a) is still half-activated; (g) if still half activated, checking whether the forward side actuating means can be actuated (S1a=1?); (h) if cannot be actuated, ending control; (i) if can be actuated, stopping the reverse side executing means (J1B); and (j) returning to step (g) of claim 6.
Claim 12
Dependent Claim
86 words
The sequence control method of claim 6, which further comprises the steps of: (a) activating a first timer (K1) when the forward side executing means is activated in step (i) of claim 6; (b) deactivating the first timer when the forward side stopping means is activated in step (l) of claim 6 to measure a first processing time of the forward side executing means; (c) comparing the first measured time (K1) with a reference time (T1) to determine whether the forward side execution means operates normally.
Claim 13
Dependent Claim
86 words
The sequence control method of claim 7, which further comprises the steps of: (a) activating a second time (K2) when the reverse side executing means is activated in step (i) of claim 7; (b) deactivating the second time when the reverse side stopping means is activated in step (l) of claim 7 to measure a processing time of the the reverse side executing means; (c) comparing the second measured time (K2) with a reference time (T2) to determine whether the reverse side executing means operates normally.
Claim 14
Dependent Claim
111 words
The sequence control method of claim 6, which further comprises the steps of: (a) reading and writing data outputted from a a controlled object operating normally; (b) forming and storing a reference data table for each step on the basis of the data outputted from the controlled object operating normally; (c) reading and writing data outputted from the controlled object now operating; (d) forming and storing a present data table for each step; (e) reading the stored reference and present data table for each step; (f) comparing the present data table with the stored reference table; (g) if two do not match, displaying a sequence circuit and indicating an abnormal spot.
Claim 15
Dependent Claim
82 words
The sequence control method of claim 6, which further comprises the steps of: (a) storing various past abnormal data outputted from a controlled object operating abnormally for each step; (b) reading present abnormal data outputted from the controlled object operating abnormally at a step; (c) analyzing an abnormal spot by comparing the present abnormal data with the past abnormal data; (d) displaying analyzed results on a display unit; (e) retrieving a present abnormal spot; and (f) updating the stored past abnormal data.
References Cited (Backward Citations)
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