Siemens SINUMERIK 840Di Function Manual page 981

Relevant parameters (FB1) (all entries as parameterized in SDB210 global data)
MCP
MCPNum=1 or 2 (number of MCPs)
MCP1In
MCP1Out
MCP1StatRec
MCP1Timeout
Status information
Available in
MCP1StatRec
MCP2StatRec
BHGStatRec
An error entry is also made in the PLC diagnostic buffer for timeouts,
resulting in the following error messages on the MMC:
• 400260: MCP 1 failure
• 400261: MCP 2 failure
• 400262: HHU failure
An MCP/HHU failure is only detected following a cold restart if the unit has already been
involved in data exchange. The first exchange of data with the MCP/HHU activates the
monitoring function.
840D: PROFIBUS connection
With an MCP PROFIBUS connection, these components must be considered in the STEP 7
hardware configuration. The addresses must be stored in the input and output log range.
These start addresses must also be stored in the pointer parameters of the FB1. The FB1
parameters listed below are used for further parameterization. There is no PROFIBUS
variant of the HHU. For this reason, an Ethernet connection is shown for the HHU in this
figure. PROFIBUS slave address can be stored in MCP1BusAdr and MCPBusAdr.
Power Line Basic PLC Program (P3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Bit No.
10
Or
2.7 Structure and functions of the basic program
MCP2In
MCP2Out
MCP2StatRec
MCP2Timeout
Description
Receiver: Time out
Detailed description
HHU
BHG=1 (MPI)
BHGIn
BHGOut
BHGStatRec
BHGTimeout
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