Siemens SINUMERIK 840Di Function Manual page 979

resulting in the following error message on the MMC:
• 400262: HHU failure
An HHU failure is only recognized if data exchange has taken place previously with the HHU.
The first exchange of data with the HHU activates the monitoring function.
MPI connection
Communication starts from the PLC BP via the NCK and COM mode, i.e., even a link via the
MPI does not require an SDB210. Parameter settings are made via the relevant parameters
in FB1.
Fig. 2-17
Relevant parameters (FB1)
MCP
MCPNum=1 or 2 (number of MCPs)
MCP1In
MCP1Out
MCP1StatSend
MCP1StatRec
MCP1BusAdr
MCP1Timeout
MCP1Cycl
MCPMPI = TRUE (MPI)
MCP1Stop
Power Line Basic PLC Program (P3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
MPI connection
MCP2In
MCP2Out
MCP2StatSend
MCP2StatRec
MCP2BusAdr
MCP2Timeout
MCP2Cycl
MCP2Stop
2.7 Structure and functions of the basic program
HHU
BHG=2
(transfer via COM module)
BHGIn
BHGOut
BHGStatSend
BHGStatRec
BHGInLen
BHGOutLen
BHGTimeout
BHGCycl
BHGRecGDNo
BHGRecGBZNo
BHGRecObjNo
BHGSendGDNo
BHGSendGBZNo
BHGSendObjNo
BHGMPI = TRUE (MPI)
BHGStop
Detailed description
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