P3: Basic PLC Program for SINUMERIK 840D sl
13.16 Data lists
Basic Functions
1086
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
13.16
Data lists
13.16.1
Machine data
13.16.1.1 NC-specific machine data
13.16.1.2 Channelspecific machine data
Number
Identifier: $MN_
Description
10100
PLC_CYCLIC_TIMEOUT
Cyclic PLC monitoring time
14504
MAXNUM_USER_DATA_INT
Number of user data (INT)
14506
MAXNUM_USER_DATA_HEX
Number of user data (HEX)
14508
MAXNUM_USER_DATA_FLOAT
Number of user data (FLOAT)
14510
USER_DATA_INT
User data (INT)
14512
USER_DATA_HEX
User data (HEX)
14514
USER_DATA_FLOAT[n]
User data (FLOAT)
Note
Machine data in integer/hex format is operated in the NC as DWORD. A machine data in
floating point format is managed in the NC as FLOAT (8-Byte IEEE) They are stored only in
the NC/PLC interface and can be read by the PLC user program from DB 20 even during
PLC booting.
Number
Identifier: $MC_
Description
28150
MM_NUM_VDIVAR_ELEMENTS
Number of elements for writing PLC variables