Connection And Switchover Conditions - Siemens SINUMERIK 840D sl Function Manual

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
2.2.9

Connection and switchover conditions

Proceed as follows to allow a previously offline control unit on a particular NCU to go online
or to switch an online control unit over to another NCU:
PCU
1. Press the channel switchover key to call up the channel menu on the PCU.
2. Select the channel group via a horizontal softkey.
3. Select the appropriate vertical softkey for the channel. See "Implementation of control unit
HT6
1. Activate the "Panel Function" by selecting the key with the same name.
2. Select the "Channel" softkey.
3. Select the channel group.
4. Select the channel.
The PCU/HT6 is then switched to online operation or to another NCU, provided that its change in
status is not blocked by one of the following conditions (displayed in message line).
Messages for PCU switchover
HMI Embedded
109001
109002
109003
109004
109005
109006
109007
109009
109010
109012
109013
Note
Corresponding messages are output without a message number on HMI Advanced.
Additional messages can be generated in HMI Embedded/HT6 and HMI Advanced indicating
the current status or errors in the configuration or operating sequence.
For more information, see
References: /DA/ Diagnostics Manual, Chapter 1
120
switchover".
If the required channel is not included in this group, then you can return to point no. 2 by
pressing the "Recall" key.
Message Text
No switchover: Switchover disable set in current PLC
No switchover: Target PLC occupied, try again
No switchover: Switchover disable set in target PLC
No switchover: PLC occupied by higher-priority PCUs
No switchover: No PCU can be suppressed on target PLC
No switchover: Selected channel invalid
Channel switchover in progress
Switchover: Error in internal state
Suppression: Error in internal state
Control unit switchover, PLC timeout: 002
Activation rejected
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions