Operating Mode Switchover - Siemens SINUMERIK 840D sl Function Manual

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B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl

2.2 Several operator panel fronts and NCUs with control unit management option

Channel switchover

You can switch over to other channels by means of the vertically arranged softkeys.

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.

The softkeys only offer the connections that are really assigned and whose channels are

active in the relevant NC.

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

Operating Manual.

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.

Function Manual, 09/2009, 6FC5397-1BP20-0BA0

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