Siemens Second Wind Function Manual page 17

Global rampdown
Global rampdown is triggered if the F-CPU detects a communication error on an HMI device
which is integrated in the PROFIsafe communication.
Global rampdown is the defined shutdown of the machines assigned in the safety program
within a defined time period.
Global rampdown is independent of the effective ranges.
In the safety program of the F-CPU, ensure that global rampdown is available in the event
that a communication error occurs on an HMI device which is integrated in the PROFIsafe
communication.
Trigger
The switch off can have the following triggers:
● The operator presses the emergency stop button.
● A communication error occurs.
● Timeout: The HMI device is logged on at the effective range and the operator leaves the
Triggering the switch off
The following table shows the effect of the different triggers depending on the operating
situation:
Operating situation
HMI not integrated
HMI HMI device logged on
integrated at the effective range
HMI device is logged off from the effective range
Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
effective range with his HMI device for longer than 30 seconds.
HMI device is in the
effective range
HMI device is outside of the
effective range for less than
30 seconds
HMI device is outside of the
effective range for longer
than 30 seconds
Overview and definition of terms
Trigger
Emergency stop Communication
pressed error
--- ---
Emergency stop Shutdown
Emergency stop Shutdown
Emergency stop Shutdown
Emergency stop Global
rampdown
1.3 Switch-off behavior
Timeout
---
---
---
Local
rampdown.
---
17