08/2005 Commissioning HMI Advanced (IM4)
2 Setting Functions and Parameters
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Installation and Start-Up HMI (IAM) - 08/2005 Edition
IM4/2-51
Data transfer from and to the TCU
The USB interface of the TCU that is currently active is always the one accessed,
i.e., has the operator focus. If the active TCU changes during a data transfer, the
data transfer remains active in the background.
Note
If an operation (copy, delete, edit) is active on the drive at the time of the TCU
switchover, the display is retained until the action is finished (in the case of the
editor, when the editor is closed). The display is not updated until the operation is
finished.
Because the TCU is connected to the HMI via a network connection, the response
times depend on the particular network. In the event of execution from an external
source or an EXTCALL, the program may be aborted. However, this is an unlikely
scenario as the TCUs are operated in a separate network.
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