Detailed description
2.7 Structure and functions of the basic program
Power Line Basic PLC Program (P3)
2-66 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
An MCP or HHU failure is detected immediately after a cold restart even if no data have yet
been exchanged between the MCP/HHU and PLC.
The monitoring function is activated as soon as all components have signaled "Ready" after
powerup.
840D: MPI connection for HHU (not for new development)
Communications for HHU by PLC operating system and parameterization via SDB210.
Communication for the MCP is controlled from the PLC BP via the NCK and COM module as
described above.
03,
++8
1&.
'
3
5
23,
0&3
0&3
'
3
5
6'%
IRU++8
&200
PRGXOH
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Fig. 2-16 840D: MPI connection for HHU
Relevant parameters (FB1):
Communication between the PLC and HHU is implemented through configuring and
subsequent loading of SDB210 (Global Data). To allow the basic program to access the
HHU data and implement HHU failure monitoring, the addresses set via global data must be
declared in FB1 parameters.
Relevant parameters (FB1)
MCP HHU
(parameterization via SDB210)
Parameter settings are made via the
relevant parameters in FB1.
BHG = 1 (transfer via SDB210)
BHGIn (as parameterized in SDB210)
BHGOut (as parameterized in SDB210)
BHGStatRec (as parameterized in SDB210)
BHGTimeout (as parameterized in SDB210)
Status information (MCP1 and MCP2 see table Status information)
Available in Bit No. Description
BHGStatRec 10 Receiver: Timeout
An error entry is also made in the PLC diagnostic buffer for timeouts,
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