Acnodes FPC-8057 用户手册

To conform to ICS Safety Recommendations, checks should be placed in the 

controller to ensure that all writable registers that control critical parts of 

plant or machinery have limit checks built into the program, with an out-of-

limit safe shut down procedure to ensure safety of personnel. 

Consideration should be given to the use of an emergency stop 

function, which is independent of the programmable controller. 

Where the operator is exposed to the machinery, such as in loading or 

unloading a machine tool, or where the machine cycles automatically, 

consideration should be given to the use of an electromechanical override 

or other redundant means, independent of the programmable controller, for 

starting and interrupting the cycle. 

If provision is required for changing programs while the equipment is in 

operation, consideration should be given to the use of locks or other 

means of assuring that only authorized personnel can make such 

changes. 

These recommendations are intended as safeguards against the failure of 

critical components and the effects of such failures or the inadvertent 

errors that might be introduced if programs are changed while the 

equipment is in operation. * 

z The ICS 3-304.81 Safety Recommendations are reproduced by 

permission of the National Electrical Manufacturers Association from 

NEMA ICS 3-304 

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