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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54 Chapter 4 Application Development<br />
Table 12<br />
Parameter<br />
IO_NO_VOTER_FLTS<br />
IO_ERROR<br />
MAX_TIME_DUAL<br />
MAX_TIME_SINGLE<br />
MAX_SCAN_TIME<br />
Table 13<br />
Parameter<br />
CO<br />
OPERATING<br />
TMR<br />
DUAL<br />
SINGL<br />
ZERO<br />
TIMER_RUNNING<br />
TIME_LEFT<br />
If true, then no voter faults exist on a critical I/O module<br />
If false, then a voter fault exists on a critical I/O module<br />
Error number: Zero indicates no error. Non-zero indicates a<br />
programming or configuration error<br />
Maximum time with only two channels operating<br />
Maximum time with only one channel operating<br />
50% of the maximum response time<br />
Output Parameters <strong>for</strong> SYS_SHUTDOWN Function Block in EX02_SHUTDOWN<br />
ALARM_PROGRAMMING_PERMITTED<br />
ALARM_REMOTE_ACCESS<br />
ALARM_RESPONSE_TIME<br />
ALARM_DISABLED_POINTS<br />
ERROR_NUM<br />
Input Parameters <strong>for</strong> SYS_SHUTDOWN Function Block in EX02_SHUTDOWN<br />
Description<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 process<br />
System is operating in triple modular redundant<br />
mode<br />
At least one safety-critical point is controlled by<br />
two channels<br />
At least one safety-critical point is controlled by<br />
one channel<br />
At least one safety-critical point is not controlled<br />
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 nonzero<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