CHECK_BACK_MASK (50)
Storage class: – · Read capability (r)
Defines the supported status bits in CHECK_BACK
Bit = 0: Status not supported
Bit = 1: Status supported
CHECK_BACK_OPT (65)
Storage class: S · Read/write capability (r/w) · Supported modes: ALL
This alarm does not apply for acyclic access
Defines the support of the status bit in CHECK_BACK for cyclic data exchange
• [0x8F, 0xEC, 0x83]
• Bit = 0 · Status not supported
• Bit = 1 · Status supported
FSAFE_TIME (39)
Storage class: S · Read/write capability (r/w) · Supported modes: ALL
Fail-safe time [s]
Time from detection of failure of the setpoint valid for the AO Function Block in the current mode until
the fail-safe action is triggered
• [0]
Note: If the error still persists after the fail-safe time has elapsed, fail-safe action is triggered. The
fail-safe action of the AO Function Block is determined by FSAFE_TYPE in this Block.
FSAFE_TYPE (40)
Storage class: S · Read/write capability (r/w) · Supported modes: ALL
Fail-safe action
Defines the reaction to be taken when a communication failure is detected or after a warm start
• 0 · The default value FSAFE_VALUE is used
• 1 · The last valid setpoint is used/The last valid setpoint is saved
• 2 · Actuator moves to the fail-safe position defined by the actuator springs
FSAFE_VALUE (41)
Storage class: S · Read/write capability (r/w) · Supported modes: ALL
Fail-safe value
Default value for setpoint (reference variable w) used when a communication failure is detected or after
a warm start
64 KH 8384-4 EN
AO Function Block, Slot 1 · Profile-specific parameters
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