JPS648404A - Relay check system for pmc - Google Patents

Relay check system for pmc

Info

Publication number
JPS648404A
JPS648404A JP62163813A JP16381387A JPS648404A JP S648404 A JPS648404 A JP S648404A JP 62163813 A JP62163813 A JP 62163813A JP 16381387 A JP16381387 A JP 16381387A JP S648404 A JPS648404 A JP S648404A
Authority
JP
Japan
Prior art keywords
change
contact
memory
stored
pmc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62163813A
Other languages
Japanese (ja)
Inventor
Sachihiro Nakajima
Yoichiro Nishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fanuc Corp filed Critical Fanuc Corp
Priority to JP62163813A priority Critical patent/JPS648404A/en
Publication of JPS648404A publication Critical patent/JPS648404A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To easily and surely detect a contact causing a change by executing exclusive OR processing of the stored contents of logical states between a relay coil and contact respectively obtained before and after the change and specifying and displaying the contact. CONSTITUTION:A logical state obtained before a change is stored in an N-bit memory 1 storing the state of a coil in the N-th bit and storing the states of contacts in the 1st (N-1)th bits and the logical state obtained after the change is stored in a memory 2 similarly to the memory 1. When the exclusive OR processing of the contents of respective bits in the memories 1, 2 is executed and the processed result is stored in a memory 3 having the same constitution as the memories 1, 2, a contact corresponding to a obit set up to '1' can be easily and surely detected and displayed as a contact causing the change.
JP62163813A 1987-06-30 1987-06-30 Relay check system for pmc Pending JPS648404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62163813A JPS648404A (en) 1987-06-30 1987-06-30 Relay check system for pmc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62163813A JPS648404A (en) 1987-06-30 1987-06-30 Relay check system for pmc

Publications (1)

Publication Number Publication Date
JPS648404A true JPS648404A (en) 1989-01-12

Family

ID=15781203

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62163813A Pending JPS648404A (en) 1987-06-30 1987-06-30 Relay check system for pmc

Country Status (1)

Country Link
JP (1) JPS648404A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5203188A (en) * 1991-09-16 1993-04-20 Morgan Construction Company System and method for monitoring a rolling mill
KR100459208B1 (en) * 1998-02-26 2005-01-31 엘지산전 주식회사 Relay operation feedback circuit of digital output board having improved reliability

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5203188A (en) * 1991-09-16 1993-04-20 Morgan Construction Company System and method for monitoring a rolling mill
KR100459208B1 (en) * 1998-02-26 2005-01-31 엘지산전 주식회사 Relay operation feedback circuit of digital output board having improved reliability

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