Informing The Plc Via The Current Task Number Of The Hmi - Siemens SINUMERIK 840D sl Commissioning Manual

Commissioning HMI Advanced (IM4)
2 Setting Functions and Parameters

2.1.2 Informing the PLC via the Current Task Number of the HMI

Task number
A task describes the position at which an operating area is attached in the HMI
area menu, i.e., the highest level.
The following fixed relationship exists between softkey bars of the area menu and
tasks:
First softkey bar:
Softkey
Task
number
Second softkey bar:
Softkey
Task
number
Third softkey bar:
Softkey
Task
number
Which application is assigned to which task number is stored/configured in the
[TaskConfiguration] section in the REGIE.INI file (see 5.6.14 REGIE.INI).
A fourth softkey bar can be used for OEM applications.
Fourth softkey bar:
Softkey
Task
number
Task numbers 24 to 95 are already reserved for child tasks of standard
applications or for specific OEM tasks. The associated label texts can be entered in
the language-dependent re_xx.ini files.
Application
For manufacturer-configured user interfaces, proper concurrence of key strokes on
the machine operator panel and the displayed operating areas/screens is essential.
Example:
The "Move unit" function is selected in a screen form. On the MCP are "forward"
and "backward" traversing keys, which are used to move the unit in real time.
To prevent a new screen from being displayed before the traversing key movement
has been completed, due to an operating area switchover in the HMI, for example,
the PLC is always able to know and check the current task number.
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SINUMERIK 840D sl/840D/840Di/810D Installation and Start-Up HMI (IAM) - 08/2005 Edition
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08/2005