Siemens SINUMERIK 840D sl Function Manual page 848

P3: Basic PLC program for SINUMERIK 840D sl
13.9 Interface structure
Figure 13-8
Bus addresses
On Ethernet components, MAC and IP addresses or logic names are determining factors in
respect of communication. The control system's system programs convert logic names into
MAC or IP addresses. On the PLC, the numeric component of the logic name is used for
communication. This numeric part is specified by the user to the FB1 using parameter
"MCPxBusAdr".
The logical name of an MCP or HHU always begins with "DIP". This is followed by a number
corresponding to the switch position of the MCP component (e.g. DIP192, DIP17).
MCP interface in the PLC
The signals from the machine control panel are routed by default via the I/O interface to the
PLC area. A distinction must be made between NC and machine-specific signals. NC-specific
key signals are distributed to the relevant mode-group-, NCK-, axis- and spindle-specific
interface by FC19 (or FC24, FC25, FC26, depending on the type of MCP) by default. The
reverse applies to the associated status signals which are routed to the MCP interface. For
this purpose, FC19 or the other blocks mentioned above must be called in the user program.
Customized keys, which can be used to trigger a wide range of machine functions, must be
evaluated directly by the user program. The user program also routes the status signals to the
output area for the LEDs.
848
Connection of the machine control panel on 840D sl
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions