Siemens SINUMERIK 840Di Function Manual page 1163

2.13.2 Decoded M signals
General
The M functions programmed in the part program, ASUB or synchronized actions are
channel specifically transferred from the NC to the PLC:
• M functions from channel 1: DB21
• M functions from channel 2: DB22
• etc.
The signal length is one PLC cycle.
Note
The spindle-specific M functions below are not decoded: M3, M4, M5, and M70.
Addresses in DB21, ...
DBX 194.0 ... 7
DBX 195.0 ... 7
DBX 196.0 ... 7
DBX 197.0 ... 7
DBX 198.0 ... 7
DBX 199.0 ... 7
DBX 200.0 ... 7
DBX 201.0 ... 7
DBX 202.0 ... 7
DBX 203.0 ... 7
DBX 204.0 ... 7
DBX 205.0 ... 7
DBX 206.0 ... 3
Power Line Basic PLC Program (P3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Variable
M_Fkt_M0 ... M7
M_Fkt_M8 ... M15
M_Fkt_M16 ... M23
M_Fkt_M24 ... M31
M_Fkt_M32 ... M39
M_Fkt_M40 ... M47
M_Fkt_M48 ... M55
M_Fkt_M56 ... M63
M_Fkt_M64 ... M71
M_Fkt_M72 ... M79
M_Fkt_M80 ... M87
M_Fkt_M88 ... M95
M_Fkt_M96 ... M99
Type Comment
Bool M signals M0 ... M7
Bool M signals M8 ... M15
Bool M signals M16 ... M23
Bool M signals M24 ... M31
Bool M signals M32 ... M39
Bool M signals M40 ... M47
Bool M signals M48 ... M55
Bool M signals M56 ... M63
Bool M signals M64 ... M71
Bool M signals M72 ... M79
Bool M signals M80 ... M87
Bool M signals M88 ... M95
Bool M signals M96 ... M99
Detailed description
2.13 Signal/data descriptions
2-251