Siemens SINUMERIK 840D sl Function Manual page 59

If the length "0" is entered, only the useful-data slot found under the corresponding logical
start address is configured as I/O-range. In such a case, the length of the I/O-range is then
compared with the length of the useful-data slot found
Further attributes
Further attributes can be allocated to each I/O-range with the following machine data:
MD10502 $MN_ DPIO_RANGE_ATTRIBUTE_IN[n]
Bit
0
1
2
3
MD10512 $MN_ DPIO_RANGE_ATTRIBUTE_OUT[n]
Bit
0
1
2
3
Note
● The configuration of the I/O-ranges via the corresponding machine data need not be
● If the registration of one/several I/O-range(s) does not run successfully during the NCK-
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Value Description
0 Little Endian format
1 Big Endian format
Reserved
0 Reading possible via system variables and CC-binding.
1 Reading possible only for CC-binding.
0 Slot-lifespan-alarms are issued.
1 Slot-lifespan-alarms are suppressed.
Value Description
0 Little Endian format
1 Big Endian format
0 Writing only via system variable.
1 Writing only via CC-binding.
Reserved
0 Slot-lifespan-alarms are issued.
1 Slot-lifespan-alarms are suppressed.
done persistently. That is, the assignment of the I/O-ranges to the corresponding
machine data-indices can be selected in any way.
ramp up phase, the registration is aborted with an alarm (4700 or 4702).
Digital and Analog NCK I/Os (A4)
NCK I/O via PROFIBUS
59