Currently, the PLCopen workgroup has specified 20 safe function blocks regarding their inputs/outputs, state engine, error recognition and error handling. These blocks include important safety functions such as Emergency Stop, Safety Door, Mode Selector and Two-Hand Control.
Advantages through standard FBs
The correct use of safe function blocks according to the PLCopen is simplified for the PLC programmer through the manufacturer-embracing functionality. This also includes the low need for training and the easier transfer of programmed safety functions to different PLC systems. A further advantage is the low effort arising for the commissioning staff when validating the PLC program, as parts of the safety logic are based on already certified software modules.
PLCopen safety function blocks:
Mode selector
Emergency Stop
Safe Stop
Safe Operational Stop
Safely Limited Speed
Two Hand Control Type II und Type III
Safety Guard Monitoring
Safety Guard Interlocking with Locking
External Device Monitoring
Sequential Muting
Parallel Muting and Parallel Muting with 2 sensors
Enable Switch
Safety Request
Out Control
Electro-sensitive Protective Equipment
Equivalent and Antivalent
All FBs available in one library
KW-Software is the first company that implements all PLCopen blocks as certified library in the safe programming system SAFEPROG.
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