Safety Considerations Guide for Triconex General ... - ICEWeb
Safety Considerations Guide for Triconex General ... - ICEWeb
Safety Considerations Guide for Triconex General ... - ICEWeb
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Sample <strong>Safety</strong>-Shutdown Programs 51<br />
Table 10<br />
Parameter<br />
CO<br />
OPERATING<br />
TMR<br />
DUAL<br />
SINGL<br />
ZERO<br />
TIMER_RUNNING<br />
TIME_LEFT<br />
Output Parameters <strong>for</strong> SYS_SHUTDOWN Function Block in EX01_SHUTDOWN<br />
ALARM_PROGRAMMING_PERMITTED<br />
ALARM_REMOTE_ACCESS<br />
ALARM_RESPONSE_TIME<br />
ALARM_DISABLED_POINTS<br />
ERROR_NUM<br />
Description<br />
Control out<br />
When true, all safety-critical modules are<br />
operating properly<br />
When false, the time in degraded operation<br />
exceeds the specified limits; there<strong>for</strong>e, the<br />
control program should shut down the<br />
process<br />
System is operating in triple modular<br />
redundant mode<br />
At least one safety-critical point is controlled<br />
by two channels<br />
At least one safety-critical point is controlled<br />
by one channel<br />
At least one safety-critical point is not<br />
controlled by any channel<br />
Time left to shutdown is decreasing<br />
Time remaining be<strong>for</strong>e shutdown<br />
True if application changes are permitted<br />
True if remote-host writes are enabled<br />
True if actual scan time is greater than<br />
MAX_SCAN_TIME<br />
True if one or more points are disabled.<br />
Error Number:<br />
0 = No error<br />
1 = Error in maximum time<br />
2 = I/O function block error. IO_ERROR is<br />
non-zero<br />
3 = Function block error. System status or MP<br />
Status<br />
<strong>Safety</strong> <strong>Considerations</strong> <strong>Guide</strong> <strong>for</strong> <strong>Triconex</strong> <strong>General</strong> Purpose v2 Systems
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