Siemens SINUMERIK 840D sl Function Manual page 91

At any given time, only one preselected NCU can be connected to the HMI Advanced
operator panel for operations:
● HMI Embedded also only has one connection for alarms.
● HMI Advanced: The PCU remains connected to all NCUs for alarms.
References
/BH/ Operator Components Manual
/IAD/ Commissioning Manual
/FB1/ Function Manual, Basic Functions, Basic PLC Program (P3)
/FB2/ Function Manual, Extended Functions; Memory Configuration (S7)
The following are described here:
● MPI/OPI bus structure, bus addresses (IAD)
● Bus terminator (IAD, FB2)
● Connection of MCPs via basic PLC program (FB1)
● DIP FIX settings of MCP (IAD)
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Several Operator Panels on Several NCUs, Distributed Systems (B3)
2.1 Brief Description
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