Siemens SINUMERIK 840DE sl Commissioning Manual page 470

Service and diagnostics
18.11 Remote diagnostics
the remote access can be used and set at each station (SINUMERIK Operate in the NCU)
individually for the station in conjunction with the relevant local PLC.
Figure 18-4 System with several NCUs, several PCUs and a fixed modem
The "Access MyMachine /P2P" option only has to be set for the NCU to which the TS Adapter
is connected at the X127 interface. Modem access can only be permitted by making the
appropriate entries at the SINUMERIK Operate on the PCU that is assigned to this NCU and
the "Request remote control" function executed. If modem access is permitted, then the service
PC implicitly has access via the plant or system network to all other NCUs and PCUs and their
operating software. The operating screens to control the remote access can be individually
used and set at each station (SINUMERIK Operate in the NCU) for the station in conjunction
with the relevant local PLC.
18.11.3 PLC control for remote access
In the PLC user program, you can control external viewers using the following settings.
DB19.DBX1.0
Value
Meaning
DB19.DBX1.1
Value
456
PLCExtViewerReject
= 0
Permit remote control
PLCExtViewerMode
= 0
= 1
No remote control
= 1
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1
ignored
SINUMERIK Operate (IM9)