1756-RM093F-EN-P, GuardLogix Controller Systems ... - Tuv-fs.com
1756-RM093F-EN-P, GuardLogix Controller Systems ... - Tuv-fs.com
1756-RM093F-EN-P, GuardLogix Controller Systems ... - Tuv-fs.com
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Chapter 5<br />
Characteristics of Safety Tags, the Safety Task, and Safety Programs<br />
Safety Routines<br />
Safety routines have all the attributes of standard routines, except that<br />
they can exist only in safety programs. One safety routine may be<br />
designated as the main routine. Another safety routine may be<br />
designated as the fault routine. Only safety-certified instructions may<br />
be used in safety routines.<br />
For a listing of safety instructions, see Appendix A.<br />
ATT<strong>EN</strong>TION<br />
To preserve SIL 3, you must make sure that your safety logic<br />
does not attempt to read or write standard tags.<br />
Safety Tags<br />
The <strong>GuardLogix</strong> control system supports the use of both standard and<br />
safety tags in the same project. However, the programming software<br />
operationally differentiates standard tags from safety tags.<br />
Safety tags have all the attributes of standard tags with the addition of<br />
mechanisms to provide SIL 3 data integrity.<br />
Valid Data Types for Safety Tags<br />
• AUX_VALVE_CONTROL • DIVERSE_INPUT • MUTING_FOUR_S<strong>EN</strong>SOR_BIDIR<br />
• BOOL • EIGHT_POS_MODE_SELECTOR • MUTING_TWO_S<strong>EN</strong>SOR_ASYM<br />
• CAM_PROFILE • EMERG<strong>EN</strong>CY_STOP • MUTING_TWO_S<strong>EN</strong>SOR_SYM<br />
• CAMSHAFT_MONITOR • <strong>EN</strong>ABLE_P<strong>EN</strong>DANT • MOTION_INSTRUCTION<br />
• CB_CONTINUOUS_MODE • EXT_ROUTINE_CONTROL • PHASE<br />
• CB_CRANKSHAFT_POS_MONITOR • EXT_ROUTINE_PARAMETERS • PHASE_INSTRUCTION<br />
• CB_INCH_MODE • FBD_BIT_FIELD_DISTRIBUTE • REDUNDANT_INPUT<br />
• CB_SINGLE_STROKE_MODE • FBD_CONVERT • REDUNDANT_OUTPUT<br />
• CONFIGURABLE_ROUT • FBD_COUNTER • SAFETY_MAT<br />
• CONNECTION_STATUS • FBD_LOGICAL • SERIAL_PORT_CONTROL<br />
• CONTROL • FBD_MASK_EQUAL • SFC_ACTION<br />
• COUNTER • FBD_MASKED_MOVE • SFC_STEP<br />
• DCI_MONITOR • FBD_TIMER • SFC_STOP<br />
• DCI_START • FIVE_POS_MODE_SELECTOR • SINT<br />
• DCI_STOP • INT • STRING<br />
• DCI_STOP_TEST • LIGHT_CURTAIN • THRS_<strong>EN</strong>HANCED<br />
• DCI_STOP_TEST_LOCK • MAIN_VALVE_CONTROL • TIMER<br />
• DCI_STOP_TEST_MUTE • MANUAL_VALVE_CONTROL • TWO_HAND_RUN_STATION<br />
• DINT<br />
IMPORTANT<br />
Aliasing between standard and safety tags is prohibited in<br />
safety applications.<br />
50 Publication <strong>1756</strong>-<strong>RM093F</strong>-<strong>EN</strong>-P - January 2010
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