Areas In The Plant - Siemens Second Wind Function Manual

Overview and definition of terms

1.2 Areas in the plant

1.2 Areas in the plant
WLAN area
The WLAN area is the area in the plant where the HMI device communicates with other
communication nodes over a wireless local area network.
①
②
③
When the PROFIsafe communication between the controller and operator panel is
established in the WLAN area, the emergency stop button on the HMI device becomes
active.
Safe operation of the plant with the enabling buttons only becomes possible when the HMI
device is logged on in an effective range within the WLAN area.
12
Access point is the network transition from WLAN to LAN
WLAN area in which communication with the access point is possible
Mobile panel in the WLAN area; the emergency stop button is active, the enabling buttons are
without function.
Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0