ABB AC500-S Safety User Manual page 374

Configuration and programming
AC500-S Libraries > SafetyBlocks_PLCopen_AC500_v22.lib
4.6.6.16 SF_SafetyRequest
Standards Requirements
IEC 60204-1, Ed. 9.2.4 Suspension of safety functions and/or protective measures
5.0: 2003
Where it is necessary to suspend safety functions and/or protective measures (for
example for setting or maintenance purposes), protection shall be ensured by:
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EN 954-1: 1996 5.4 Manual reset
ISO 12100-2: 4.11.4: Restart following power failure/spontaneous restart
2003
The function block represents the interface between the user program and system environment.
Fig. 120: Example of SF_SafetyRequest
This function block provides the interface to a generic actuator, e.g. a safety drive or safety valve, to place
the actuator in a safe state.
This FB provides the interface between the safety-related system and a generic actuator. This means that
the safety-related functions of the actuator are available within the application program. However, there are
only two binary signals to control the Safe state of the generic actuator, i.e., one for requesting and one for
receiving the confirmation.
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disabling all other operating (control) modes; and
other relevant means (see 4.11.9 of ISO 12100-2:2003), that can include, for
example, one or more of the following:
limitation of the speed or the power of motion;
limitation of the range of motion.
AC500-S 30.03.2017