P3: Basic PLC Program for SINUMERIK 840D sl
13.8 Structure and functions of the basic program
Basic Functions
888 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
The bit address is generated correspondingly from the first M function ("MFirstAdr") to the last M function
("MLastAdr") from bit 0 up to maximum bit 15 for each group.
Each entry in the decoding lists consists of 3 parameters, each of which is assigned to a group.
Signal list
Data block DB 76 is set up when the function is activated.
A bit is set in the appropriate group in DB 76 for an M signal decoded in the list.
At the same time, a readin disable is set in the channel in which the M function has been output.
Example
Three groups of M commands are to be decoded in the following example:
• M2 = 1 to M2 = 5
• M3 = 12 to M3 = 23
• M40 = 55
Assignment of groups
Group
Extended
M address
First M address in group Last M address in group
1 MSigGrp[1].MExtAdr MSigGrp[1].MFirstAdr MSigGrp[1].MLastAdr
2 MSigGrp[2].MExtAdr MSigGrp[2].MFirstAdr MSigGrp[2].MLastAdr
... ... ... ...
16 MSigGrp[16].MExtAdr MSigGrp[16].MFirstAdr MSigGrp[16].MLastAdr
Type and value range for signals
Signal Type Value range Remark
MExtAdr Int 0 ... 99 Extended M address
MFirstAdr DInt 0 to 99.999.999 First M address in group
MLastAdr Dint 0 to 99.999.999 Last M address in group
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