Decoded M Signals - Siemens SINUMERIK 840D sl Function Manual

P3: Basic PLC program for SINUMERIK 840D sl
13.18 Signal/data descriptions
13.18.2

Decoded M signals

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, ...
DBX194.0 ... 7
DBX195.0 ... 7
DBX196.0 ... 7
DBX197.0 ... 7
DBX198.0 ... 7
DBX199.0 ... 7
DBX200.0 ... 7
DBX201.0 ... 7
DBX202.0 ... 7
DBX203.0 ... 7
DBX204.0 ... 7
DBX205.0 ... 7
DBX206.0 ...3
Note
The M02/M30 auxiliary function output to the PLC does not state that the part program has
been terminated. To determine definitely the end of a part program in the channel, the following
interface signal must be evaluated:
DB21, ... .DBX33.5 (M02/M30 active)
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.
1064
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
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions