Siemens SINUMERIK 840D sl Function Manual page 1524

Detailed description
2.13 Signal/data descriptions
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
Note
The M02/M30 auxiliary function output to the PLC does not state that the part program has
been terminated. In order to securely identify the end of a part program in the channel,
DB21, ... DBX33.5 (M02/M30 active)
must be evaluated. The channel status must be RESET. The auxiliary function output could
arise from an asynchronous subroutine (ASUB) or a synchronized action and has nothing to
do with the real end of the parts program in this case.
250
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
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0