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
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