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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SYS_CRITICAL_IO 83<br />
Library<br />
Trident and Tri-GP (TRDLIB)<br />
Structured Text<br />
FUNCTION_BLOCK SYS_CRITICAL_IO<br />
VAR_INPUT<br />
CI : BOOL := TRUE ; (* Control in. *)<br />
RESET : BOOL ; (* Reset *)<br />
IOP : DINT ; (* IOP number 0-15 *)<br />
SLOT : DINT ; (* SLOT number 0-56 *)<br />
APP : DINT ; (* Application number 1-2 *)<br />
RELAY_OK : BOOL := TRUE ; (* Relay is energized and not stuck. *)<br />
END_VAR<br />
VAR_OUTPUT<br />
CO : BOOL ; (* Critical IO Control out. *)<br />
TMR : BOOL ; (* Critical IO 3 channels operating. *)<br />
GE_DUAL : BOOL ; (* Critical IO 2 or more channels operating. *)<br />
GE_SINGLE : BOOL ; (* Critical IO 1 or more channels operating. *)<br />
NO_VOTER_FLTS : BOOL ; (* No voter faults on critical modules. *)<br />
ERROR : DINT ; (* Error number. *)<br />
(*<br />
* Error number:<br />
* 0 = No error.<br />
* -1 = IOP invalid.<br />
* -2 = Slot not valid.<br />
* -3 = Module not configured.<br />
* -4 = Wrong module type.<br />
* -5 = Application number is invalid.<br />
* -6 = Not initialized.<br />
*)<br />
END_VAR<br />
VAR<br />
PREVIOUS_RESET : BOOL ; (* All channels operating. *)<br />
IO : SYS_IO_STATUS ; (* IO module status. *)<br />
RELAY : DINT := 1 ; (* De-energized to trip with relay *)<br />
DE_ENERGIZED : DINT := 2 ; (* De-energized to trip with no relay *)<br />
U : BOOL ; (* Unused value. *)<br />
END_VAR<br />
(*<br />
*=F===============================================================================<br />
* FUNCTION_BLOCK: SYS_CRITICAL_IO<br />
* Purpose: Calculate status of critical IO modules.<br />
*<br />
* Return: none<br />
*<br />
* Remarks:<br />
* Usage<br />
* 1. Invoke once with RESET := TRUE, to initialize.<br />
* 2. Invoke again with RESET := FALSE, CI := TRUE, APP := DE_ENERGIZED, and<br />
* RELAY_OK := FALSE to complete initialization.<br />
* 3. Invoke repeatedly, once <strong>for</strong> each critical IO module.<br />
* 4. Read outputs CO, TMR, GE_DUAL, and GE_SINGLE <strong>for</strong> safety critical results.<br />
*<br />
* In step 3, invoke with the IOP and SLOT of the critical IO module,<br />
* the module application, and the relay status.<br />
* For example, if IOP 1 SLOT 1 is a critical DO module with a relay,<br />
* and SCIO is the function block instance name:<br />
* SCIO( IOP:=1, SLOT:= 1, APP:=RELAY, RELAY_OK:=RELAY1_OK );<br />
*<br />
<strong>Safety</strong> <strong>Considerations</strong> <strong>Guide</strong> <strong>for</strong> <strong>Triconex</strong> <strong>General</strong> Purpose v2 Systems