Safety instrumented control apparatus and method thereof, and safety instrumented system
First Claim
1. A safety instrumented control apparatus comprising:
- a message transmitter that transmits an alarm message to a display apparatus based on an output from a field device that continues to output an alarm upon detecting an abnormal condition until a reset operation is performed;
a storage that stores a group ID for identifying a group of the field devices;
a reset circuit that counts on a timer until a predetermined amount of time passes after the reset operation;
a diagnosing circuit that, during the count of the timer for any of the field devices belonging to the group ID, adds display suppression information to the alarm message related to the field device belonging to the group ID;
a record storage where the alarm message is saved irrespective of the count of the timer; and
an activation state managing circuit that manages an activation state of the field device, whereinwhen any one of the field devices has not returned to a normal state after the end of the count of the timer, the diagnosing circuit retransmits, to the display apparatus, the alarm message during the count of the timer saved in the record storage.
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Accused Products
Abstract
A safety instrumented control apparatus includes: a message transmitter that transmits an alarm message to a display apparatus on the basis of an output from a field device that continues to output an alarm on the basis of detection of an abnormal condition until a reset operation is performed; a storage that stores a group ID for identifying a group of the field devices; a reset manager that counts on a timer until a predetermined amount of time passes after the reset operation; and a diagnoser that, during the count of the timer for any of the field devices belonging to the group ID, adds display suppression information to the alarm message related to the field device belonging to the group ID.
11 Citations
13 Claims
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1. A safety instrumented control apparatus comprising:
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a message transmitter that transmits an alarm message to a display apparatus based on an output from a field device that continues to output an alarm upon detecting an abnormal condition until a reset operation is performed; a storage that stores a group ID for identifying a group of the field devices; a reset circuit that counts on a timer until a predetermined amount of time passes after the reset operation; a diagnosing circuit that, during the count of the timer for any of the field devices belonging to the group ID, adds display suppression information to the alarm message related to the field device belonging to the group ID; a record storage where the alarm message is saved irrespective of the count of the timer; and an activation state managing circuit that manages an activation state of the field device, wherein when any one of the field devices has not returned to a normal state after the end of the count of the timer, the diagnosing circuit retransmits, to the display apparatus, the alarm message during the count of the timer saved in the record storage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A plant control method comprising:
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transmitting an alarm message to a display apparatus based on an output from a field device that continues to output an alarm upon detection of an abnormal condition until a reset operation is performed; storing a group ID for identifying a group of the field devices; counting on a timer until a predetermined amount of time passes after the reset operation; during the count of the timer for any of the field devices belonging to the group ID, adding display suppression information to the alarm message related to the field device belonging to the group ID; saving the alarm message irrespective of the count of the timer; managing an activation state of the field device; and when any one of the field devices has not returned to a normal state after the end of the count of the timer, retransmitting, to the display apparatus, the alarm message during the count of the timer saved in the record storage. - View Dependent Claims (12)
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13. A safety instrumented control apparatus comprising:
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a message transmitter that transmits an alarm message to a display apparatus based on an output from a field device that continues to output an alarm upon detecting an abnormal condition until a reset operation is performed; a storage that stores, as definition information, information where a group ID for identifying a group of the field devices, a reset variable, and an ID of an input/output module connected to the safety instrumented control apparatus are associated with one another; an application executing circuit that outputs, in response to the reset operation, a reset signal to the reset variable; a resetting circuit that refers to the definition information and transmits a reset command to the input/output module corresponding to the reset variable; a reset circuit that counts on a timer until a predetermined amount of time passes after the reset operation; and a diagnosing circuit that, during the count of the timer for any of the field devices belonging to the group ID corresponding to the reset variable, adds display suppression information to the alarm message related to the field device belonging to the group ID.
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Specification