Siemens SINUMERIK 828D Function Manual page 901

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MCP failure normally switches the PLC to the STOP state. If this is unwanted, OB 82, OB 86 can be used to

avoid a PLC stop. The basic program has, as standard, the OB 82 and OB 86 call. FC5 is called in these OBs.

This FC5 checks whether the failed slave is an MCP. If this is the case, no PLC stop is triggered. Setting

MCPxStop := True causes the basic program to deactivate the MCP as a slave via SFC 12. If the PLC does not

switch to the stop state following the failure of or a fault on the MCP, an alarm message will be generated via the

basic program. The alarm is deleted when the station returns.

840D sl: PROFINET connection

In case of a PROFINET connection of the MCP, this component must be parameterized in the hardware

configuration of STEP 7. The MCP is coupled with the PROFINET module of the CPU.

When parameterizing the MCP in HW Config, the addresses should be placed in the input and output mapping

area. These start addresses must also be stored in the pointer parameters (MCPxIn and MCPxOut) of FB1. This

is because signals are transferred between the MCP and basic program via these parameters. The MCP is also

monitored using parameter MCPxIn. The is the reason that parameter MCPxBusAdr is not relevant for this MCP

Enter the pointer to the configured diagnostic address (e.g. P#A8190.0) in MCPxStatRec.

The PROFINET-MCP has its own type, which should be applied for parameter MCPBusType.

The FB1 parameters listed below are used for further parameter assignment. There is no Profibus variant of the

HHU. An Ethernet port for the HHU is shown in the diagram.

Figure 13-19 840D sl: PROFINET connection

Relevant parameters (FB1)

MCPNum = 1 or 2 (number of MCPs)

MCP1StatSend (n.r.)

MCP1StatRec (n.r.)

MCP1BusAdr (n.r.)

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

MCP2StatSend (n.r.)

MCP2StatRec (n.r.)

MCP2BusAdr (n.r.)

P3: Basic PLC Program for SINUMERIK 840D sl

13.8 Structure and functions of the basic program

HHU = 5 (via CP 840D sl)

Sinumerik 840d sl