Siemens SINUMERIK 840DE sl Commissioning Manual page 96

Creating drive connections
5.3 Setting the EES
General information
Note
We do not recommend that a USB front interface is permitted for part program execution using
EES if a system has several local USB front interfaces (several TCUs, the use of a HT8, etc.).
The connection to the USB FlashDrive can be interrupted as a result of the TCU switchover.
This setting should be made using the checkbox "Use this drive for program execution with
EES".
Note
If a global USB front interface should be used via PCU, then the PCU must be configured as
server via the VNC connection, see Chapter "Configuring VNC connections (Page 379)".
5.2 Setting EXTCALL
Using the EXTCALL command, a program on an external program memory can be called from
a part program.
EXTCALL must be switched off, when in certain configurations two SINUMERIK Operate are
connected to one NCU.
Activating the function
Processing EXTCALL calls is switched-on or switched-off using the following display machine
data.
MD9106 $MM_SERVE_EXTCALL_PROGRAMS
= 0
= 1
= 2
= 3
Note
A main program selected from an external program memory is selected again automatically
after a power-on if the same program memory is still available and execution of EXTCALL calls
has been activated in MD9106.
5.3 Setting the EES
The EES (Execution from External Storage) function allows part programs for drives to be
processed directly without reload buffer. The behavior is the same as that for processing from
the NC part program memory without the restrictions that apply to "processing external".
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HMI ignores EXTCALL instructions and selection via PLC
HMI processes EXTCALL instructions and selection via PLC (default value)
HMI processes EXTCALL instructions and ignores selection via PLC
HMI ignores EXTCALL instructions and processes selection via PLC
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1
SINUMERIK Operate (IM9)