Operation
6.2 Typical applications
Fail-safe operation of the Mobile Panel 277F IWLAN
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Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
The following must be noted when working with the Mobile Panel 277F IWLAN:
● Pay attention to the "SAFE" LED.
If the HMI device is integrated in fail-safe communication, the "SAFE" lights up and the
emergency stop button is active.
● Pay attention to the "COM" LED.
If you leave the area with sufficient WLAN coverage, the "COM" LED will flash.
Communication between the HMI device and PLC is down. You can no longer operate
the system with the HMI device.
● Check the "RNG" LED when the HMI device is logged onto the effective range.
The "RNG" LED indicates when the HMI device is logged onto the effective range.
Logging onto the effective range is required for the enabling button to be active.
CAUTION
Unauthorized operation possible
It is not permitted to leave the effective range without an HMI device while the HMI
device is logged on to the effective range.
6.2
Typical applications
6.2.1
Overview
Introduction
Typical applications for the HMI device are described in this chapter.
The assumption for all application cases is that the HMI device will be used in mobile
operation with batteries.
Structure of the application cases
All application cases are described in the same form:
● Description and identification of the initial situation
● Action of the operator and of the plant
● Result of the action and identification of the new situation
Graphic representations
In the application cases the following is presented graphically.
● LED status
● Operability of the emergency stop button and of the enabling buttons
Thus you can detect the action described in the application case at a glance.
The figures used have the following meaning:
