Operating Mode Switchover - Siemens SINUMERIK 840D sl Function Manual

Group switchover
You can switch to another group by means of the softkeys on the horizontal menu (see
Section "Implementation of control unit switchover"); the channels of the currently selected
group are now displayed on the vertical softkeys. Switchover to another channel (and if
necessary to another NC) only takes place upon activation of a vertical softkey.
NC switchover
You can change to another NC via the vertical softkeys if the channel is not on the current
NC.
Procedure: Configure a channel area NCs (horiz. softkeys 1-8) if applicable and link a
channel to the vertical softkeys from each NCU.
Note
The softkeys only offer the connections that are really assigned and whose channels are
active in the relevant NC.
HT6
The channel menu on the HT6 is structured in two stages. In the first stage you select the
channel group and in the second stage, the channel. For details please refer to the HT6
Operator's Guide.
2.2.12

Operating mode switchover

Two PCUs/HT6s can be online at the same time on one NCU. In order to avoid both gaining
write access to the same data or file simultaneously, there are two operating modes, i.e.:
● the active and
● the passive operating mode.
Only one of the two PCUs/HT6s can be active; the other is passive.
Interaction takes place according to the following rules:
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Several Operator Panels on Several NCUs, Distributed Systems (B3)
2.2 Several operator panel fronts and NCUs with control unit management option
117