Siemens SINUMERIK 840DE SL - Page 1068

Detailed description
2.12 Block descriptions
Power Line Basic PLC Program (P3)
2-156 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Example of override switchover
// Auxiliary flags used M100.0, M100.1, M100.2, M100.3
// Positive edge of MCP1Ready must check override and actions for activation
// Initiate MCP block
// This example covers feed override; for spindle override, interfaces and
// input bytes must be exchanged.
V DB10.DBX 104.0; //MCP1Ready
EN M 100.0; //Edge trigger flag 1
JCN smth1;
S M 100.2; //Set auxiliary flag 1
R M 100.3; //Reset auxiliary flag 2
// Save override
L DB21.DBB 4; //Feed override interface
T EB 28; //Buffer storage (freely assignable input or
memory byte)
wei1:
V M 100.2; //Switchover takes place
O DB10.DBX 104.0; //MCP1Ready
JCN smth2;
V DB10.DBX 104.0; //MCP1Ready
FP M 100.1; //Edge trigger flag 2
JC smth2;
V M 100.2; //Switchover takes place
R M 100.2; //Reset auxiliary flag 1
JC smth2;
V M 100.3; //Comparison has taken place
JC MCP; //Call MCP program
// Guide the stored override to the interface of the switched MCP
// until the override values match
L EB28; //Buffer storage open
T DB21.DBB 4; //Guide override interface
L EB 3; //Override input byte for feed
<>i; //Match?
JC smth2; //No, jump
S M100.3; //Yes, set auxiliary flag 2
// When override values match, call the MCP program again
MCP: CALL "MCP_IFM"( //FC 19
BAGNo := B#16#1,
ChanNo := B#16#1,
SpindleIFN
o
:= B#16#0,