A4: Digital and analog NCK I/Os for SINUMERIK 840D sl
1.2 Access via PLC
Extended Functions
30 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
Weighting factor for the analog NCK I/Os
The weighting factor can be used to adapt each individual NCK I/O to the AD or DA
converter of the analog I/O module used:
• MD10320 $MN_FASTIO_ANA_INPUT_WEIGHT[<n>]
Weighting factor for the analog
NCK inputs
For further information, see
"NCK analog inputs (Page 37)".
• MD10
330 $MN_FASTIO_ANA_OUTPUT_WEIGHT[<n>]
Weighting factor for the analog
NCK outputs
For further information, see
"NCK analog outputs
(Page 39)".
Assignment to NC functions
Several NC functions are dependent on the functionality of the NCK I/Os.
The assignment of the NCK I/Os used for these NC functions is performed function-
specifically via machine data, e.g. for the "Multiple feedrates in one block" function via the
machine data:
MD21220 $MC_MULTFEED_ASSIGN_FASTIN
A byte address should be specified in the machine data for digital inputs/outputs. The
assignment is always byte-by-byte.
Byte address Assignment for the digital NCK I/Os
0 None
1 1 to 4 (on-board I/O) and 5 to 8 (NCK output without hardware)
2 9 to 16 (external NCK I/Os)
3 17 to 24 (external NCK I/Os)
4 25 to 32 (external NCK I/Os)
5 33 to 40 (external NCK I/Os)
128 Inputs 1 to 8 of comparator byte 1
129 Inputs 9 to 16 of comparator byte 2
Note
Multiple assignments
Multiple assignments of inputs are not monitored.
Multiple assignments of outputs are checked during run-up and indicated by an alarm.
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