Suppose you have a safety zone with as actuators in the zone : a failsafe pneumatic pressure release valve with safety feedback, drives on profisafe and a contactor with feedback. There is an E-stop to safely shut down the installation.
There is a reset button for the safety zone.
The safety is programmed in a Siemens S7 1500 Failsafe plc.
The E-stop is in the program connected to the E-Stop failsafe function block,
The contactor and the pressure release valve are connected to the FDBACK failsafe function block that monitors feedback of respectively the contactor and the air pressure.
If the E-stopped was pressed and afterwards retracted, is it simply enough to
reset the E-Stop function block, or is it obligated to implement in the reset conditions :
- feedback contactor is off
- feedback airpressure is off
- feedback STO of drives is active
There is a reset button for the safety zone.
The safety is programmed in a Siemens S7 1500 Failsafe plc.
The E-stop is in the program connected to the E-Stop failsafe function block,
The contactor and the pressure release valve are connected to the FDBACK failsafe function block that monitors feedback of respectively the contactor and the air pressure.
If the E-stopped was pressed and afterwards retracted, is it simply enough to
reset the E-Stop function block, or is it obligated to implement in the reset conditions :
- feedback contactor is off
- feedback airpressure is off
- feedback STO of drives is active