4.6.6.17 SF_OutControl
Standards Requirements
IEC 60204-1, Ed.
5.0: 2003
9.2.2: Stop functions: Stop function categories; Category 0 - stopping by immediate
removal of power to the machine actuators (i.e. an uncontrolled stop …)
9.2.5.2: Start: The start of an operation shall be possible only when all of the relevant
safety functions and/or protective measures are in place and are operational except for
conditions as described in 9.2.4. Suitable interlocks shall be provided to secure correct
sequential starting.
EN 954-1: 1996 5.2: Stop function; stop initiated by protective devices shall put the machine in a safe
state … and shall have priority over a stop for operational reasons
5.5: Start and restart; automatic restart only if a hazardous situation cannot exist.
5.11: Fluctuations in energy levels; in case of loss of energy supply, provide or initiate
outputs to maintain a safe state.
ISO 12100-2:
2003
4.11.4: Restart following power failure/spontaneous restart
EN 954-1: 1996 5.4 Manual reset
Control of a safety output with a signal from the functional application and a safety signal with optional
startup inhibits.
The SF_OutControl FB is an output driver for a safety output.
The safety output is controlled via S_OutControl using a signal from the functional application (ProcessCon-
trol/BOOL to control the process) and a signal from the safety application (S_SafeControl/BOOL to control
the safety function).
Optional conditions for process control (ProcessControl):
n An additional function start (ProcessControl FALSE => TRUE) is required following block activation or
feedback of the safe signal (S_SafeControl). A static TRUE signal at ProcessControl does not set S_Out-
Control to TRUE.
n An additional function start (ProcessControl FALSE => TRUE) is not required following block activation or
feedback of the safe signal (S_SafeControl). A static TRUE signal at ProcessControl sets S_OutControl
to TRUE if the other conditions have been met.
Optional startup inhibits:
n Startup inhibit after function block activation.
n Startup inhibit after interruption of the protective device.
Configuration and programming
AC500-S Libraries > SafetyBlocks_PLCopen_AC500_v22.lib
30.03.2017 AC500-S 379
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