Operator controls and displays
5.1 Operator controls and displays on the Mobile Panel 277 RO
Mobile Panel 277 RO
60 Operating Instructions, 10/2015, A5E36824256-AA
The standard input unit on the HMI device is the touch screen. All operating elements
required for touch operation are displayed on the touch screen once the HMI device has
started.
Note
Damage to the touch screen
Never touch the touch screen with pointed or sharp
objects. Avoid applying excessive
pressure to the touch screen with hard objects. Both these will substantially reduce the
useful life of the touch screen and even lead to total failure.
Always operate the HMI touch screen with your fingers or with a touch
pen.
Enabling button
Introduction
The enabling control device comprises two enabling buttons mounted on both sides of the
Mobile Panel 277 RO. The switch setting of the two enabling buttons is determined by
electrical momentary contact switches. The associated evaluation logic is dual-channel. This
means that one channel processes the enabling button information digitally and the second
channel analogously (diversity).
You only have to activate one enabling button. It is not possible for the PLC to determine
whether the Mobile Panel 277 RO is being operated with one hand or two.
The enabling buttons meet the requirements of Category 3 PL d in accordance with
EN ISO 13849-1:2008/AC:2009 when used in combination with an external monitoring
device.
Category 3 PL d in accordance with EN ISO 13849-1:2008/AC:2009 can be achieved by
implementing the enabling apparatus with 2 circuits and suitable monitoring for shorting and
crossing of these circuits.
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