Rockwell Automation 1756-L7x GuardLogix 5570 Controllers - Manual (Page 84)

84 Rockwell Automation Publication 1756-UM022A-EN-P - November 2012
Chapter 6 Develop Safety Applications
Data Type
The data type defines the type of data that the tag stores, such as bit or integer.
Data types can be combined to form structures. A structure provides a unique
data type that matches a specific need. Within a structure, each individual data
type is called a member. Like tags, members have a name and data type. You can
create your own structures, as user-defined data types.
Logix controllers contain predefined data types for use with specific instructions.
Only these data types are permitted for safety tags.
Scope
A tag’s scope determines where you can access the tag data. When you create a
tag, you define it as a controller tag (global data) or a program tag for a specific
safety or standard program (local data). Safety tags can be controller-scoped or
safety program-scoped.
Table 25 - Valid Data Types for Safety Tags
AUX_VALVE_CONTROL DCI_STOP_TEST_MUTE MANUAL_VALVE_CONTROL
BOOL DINT MUTING_FOUR_SENSOR_BIDIR
CAM_PROFILE DIVERSE_INPUT MUTING_TWO_SENSOR_ASYM
CAMSHAFT_MONITOR EIGHT_POS_MODE_SELECTOR MUTING_TWO_SENSOR_SYM
CB_CONTINUOUS_MODE EMERGENCY_STOP MOTION_INSTRUCTION
CB_CRANKSHAFT_POS_MONITOR ENABLE_PENDANT PHASE
CB_INCH_MODE EXT_ROUTINE_CONTROL PHASE_INSTRUCTION
CB_SINGLE_STROKE_MODE EXT_ROUTINE_PARAMETERS REDUNDANT_INPUT
CONFIGURABLE_ROUT FBD_BIT_FIELD_DISTRIBUTE REDUNDANT_OUTPUT
CONNECTION_STATUS FBD_CONVERT SAFETY_MAT
CONTROL FBD_COUNTER SERIAL_PORT_CONTROL
COUNTER FBD_LOGICAL SFC_ACTION
DCA_INPUT FBD_MASK_EQUAL SFC_STEP
DCAF_INPUT FBD_MASKED_MOVE SFC_STOP
DCI_MONITOR FBD_TIMER SINT
DCI_START FIVE_POS_MODE_SELECTOR STRING
DCI_STOP INT THRS_ENHANCED
DCI_STOP_TEST LIGHT_CURTAIN TIMER
DCI_STOP_TEST_LOCK MAIN_VALVE_CONTROL TWO_HAND_RUN_STATION