Siemens SIMATIC HMI Operating Instructions Manual page 26

Overview
1.4 Transponder
Zones
You can divide your system into zones.
A zone is a physical range for operator control and monitoring which is registered by the HMI
device. Depending on the project design, the HMI device displays zone-specific process
displays and allows image objects to be operated in a zone-dependent manner.
Determining the current effective range and current zone
The assignment of transponders to effective ranges and zones is predefined in the project.
Each transponder has a unique ID. The transmitting range of the transponder approximates
to a lobe shape with a range of approximately 8 m.
Distances are measured as follows:
● The HMI device sends signals in the current project
● The transponder responds to the signal from the HMI device and sends its ID to the HMI
● The HMI device evaluates the ID and only measures the distance between it and the
Thus the HMI device determines which effective range/zone it is currently in.
Installation and connection
You must install the transponders in the system such that the effective ranges and zones are
covered by the transmitting ranges of the relevant transponders.
The transponders are battery-operated.
System without effective ranges and zones
You can also operate the Mobile Panel 277F IWLAN in a system without effective ranges
and zones. In this case, no transponders are required in the system.
Accessory kit
The accessories pack is supplied with the transponder.
The accessories pack for the transponder contains the following:
● 3 AA mignon batteries, 1.5 V
Additional documents may be enclosed with the accessory kit.
See also
Distance measurement between HMI device and transponder (Page 61)
Setting transponder ID and inserting the battery (Page 66)
Effective ranges and zones (Page 58)
Radiation characteristic of the transponder (Page 314)
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device
configured transponder(s)
Mobile Panel 277F IWLAN
Operating Instructions, 12/2007, A5E01003940-01