Siemens SINUMERIK 840D sl Function Manual page 118

Several Operator Panels on Several NCUs, Distributed Systems (B3)
2.2 Several operator panel fronts and NCUs with control unit management option
Active operating mode
● The user requests active operating mode by pressing a key on the operator panel front.
Passive operating mode
● Passive mode takes effect when the other PCU/HT6 has requested active mode.
The active operating mode can be selected by 2 different methods:
● Input key
● Channel switchover key and channel selection.
Rules for operating mode switchover
The following rules apply to changes of operating mode (see also Sections "Suppression",
"Suppression strategy"):
● A PCU/HT6 which goes online on an NCU is assigned the active operating mode on this
● If two PCUs/HT6s are online, the operating mode is changed by pressing the key ("Input",
● The change from the active to the passive operating mode can be rejected by the
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Active mode has the following characteristics:
– All operations and operating areas are activated.
– The operator can operate and monitor.
– The MCP assigned to the control unit is activated.
– If data transfer processes (e.g. series machine commissioning, various tool
management services, commissioning of drive configuration) are running between the
other control unit and the shared NCU, the PCU/HT6 cannot become active
immediately.
Active mode has the following characteristics:
– The connection to the NCU is maintained.
– All operations are deactivated.
– The operator cannot operate: A window is displayed with a header and an alarm line
and a message indicating the "passive" state.
– The global menu is activated.
– Any services initiated previously (in active mode) remain active (e.g. operation via
RS-232, reloading of part programs, executing the job list, alarms).
– The MCP assigned to the control unit is deactivated.
– The application window and softkeys are deactivated.
NCU.
If another PCU/HT6 was previously active on this NCU, it changes to passive mode,
provided this is permitted by the PLC.
ENTER, RETURN) used to select the active operating mode.
PCU/HT6 if the current HMI application cannot be aborted or if it is still in progress.
Similarly, active mode cannot be selected on a PCU/HT6 if the other PCU/HT6 currently
linked to the NCU cannot be switched to passive mode.
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions