A safety PLC manufacturer has stated that proof testing includes only physical inspection for deterioration and damage,
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A safety PLC manufacturer has stated that proof testing includes only physical inspection for deterioration and damage, and a check for unauthorized program changes Detailed test of the programmed logic is not mentioned. Is this a reasonable proof test?
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Somshukla Chakraborty
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Related Book For 
Safety Instrumented System Design Techniques And Design Verification
ISBN: 9781945541438
1st Edition
Authors: Iwan Van Beurden, William Goble
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