Siemens SINUMERIK 840D sl TCU 30.3 Equipment Manual

Supplementary conditions
The following supplementary conditions apply when operating the TCU:
2 active TCU connected in parallel to NCU710.3PN
4 active TCU connected in parallel to NCU720.3PN, NCU730.3PN
4 active TCUs connected in parallel to PCU/IPC
Displacement rules
You con󹪝gure the displacement mechanism in SINUMERIK Operate in the "Setup" operating area
> menu forward key > "OPs" softkey for the respective operator panel.
The TCU can assume the following states:
• The TCU is active and has user authorization: This can be identi󹪝ed as the TCU shows the
screen of the operating software and the screen is bright.
• The TCU is active, is in the monitoring mode and has no user authorization: This can be
identi󹪝ed as the TCU shows the screen of the operating software, however, it is darkened in
comparison to the TCU with user authorization.
• The TCU is passive: The TCU shows the selection menu of the possible connections instead
of a screen of the operating software, and the softkey for selection of the last active
connection of the TCU is shown in color.
When powering up, the TCU always always attempts to establish the 󹪝rst connection. The
TCUs from a shadowing group establish their speci󹪝ed connection one after the other as long
as the maximum number of permissible active operator units is not exceeded.
If a TCU encounters the situation that this number is already reached in its power up, then
it attempts to obtain a connection via the displacement mechanism. If it can displace a
formerly active operator unit then it takes on the active status itself, otherwise it transitions
to passive status immediately after booting.
6.2.4 Disable switchover between TCU via PLC
Overview
The TCU switchover disable o󹪜ers the option of dynamically disabling switchover from one TCU
to the next when the system is running via the PLC. For the duration of the disable, a user
authorization request to change user authorizations between TCUs will be ignored by the system
and rejected.
The rejected user authorization request causes a message to be output in the dialog line of
the HMI, in the form of a feedback message for the requester. The message disappears after
󹪝ve seconds.
Networking
6.2Commissioning TCU
TCU 30.3
48 Equipment Manual, 03/2023, A5E40874197B AD

Siemens SINUMERIK 840D sl TCU 30.3 Specifications

General

Brand	Siemens
Model	SINUMERIK 840D sl TCU 30.3
Category	Security Sensors
Language	English