Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
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Application example: Safety Functions
A
A.1
Configuration and operation
Introduction
The following example shows a possible application of the safety functions of the
Mobile Panel 277F IWLAN.
Note
This example is restricted exclusively to the typical functionality of the Mobile
Panel 277F IWLAN, in this case to the "override" mode. Additional security measures, e.g.
reducing speeds when opening protective doors, must also be taken into consideration in the
safety program,depending on the plant. These measures are, however, not dependent on
the functionality of the "override" mode.
WARNING
Please also observe the information on S7 Distributed Safety, which you can find in the
programming and operating manual "SIMATIC S7 Distributed Safety - configuring and
programming" and in the online help for S7 Distributed Safety.
Sample configuration
The following sample configuration shows a robot cell which is protected by a protective
fence with a protective door.
To operate the robot in "override" mode, the following components must also be installed:
● A transponder for forming an effective range for the "override" switch. By logging on to
this effective range, the operator is granted the permission to activate the "override"
switch. Without logon to the effective range, activating the "override" switch will have no
effect.
● The "override" switch. When the operator activates the "override" switch after logon to the
relevant effective range, the "override" mode is activated by the positive edge of the
switch.
● A contact mat at the entrance to the protected area. The contact mat enables you to
detect whether the operator is leaving the protected area or whether a second person is
entering the protected area while the "override" mode is active. In these cases the
"override" mode is automatically terminated.
In addition, a lamp is installed, which indicates that the effective range is in use by the
logged on HMI device.
If the "override" mode is active, the operator controls the robot by pressing a function key on
the device and confirming operation with one of the enabling buttons.
