Parameter Assignment - Siemens SINUMERIK 840D sl Function Manual

2.4.2

Parameter assignment

Machine data
Logical start addresses of the I/O ranges
The logical start addresses of the I/O ranges used are set via the following machine data:
● Logical start addresses of the input range 1, 2, ... m:
MD10500 $MN_DPIO_LOGIC_ADDRESS_IN[ <n>] = <logical start address> ; with <n> =
0, 1, 2, ... (m - 1)
● Logical start addresses of the output range 1, 2, ... m:
MD10510 $MN_DPIO_LOGIC_ADDRESS_OUT[ <n>] = <logical start address> ; with <n>
= 0, 1, 2, ... (m - 1)
The following must be taken into account for logical start addresses within the PLC process
image (see References):
– Input slots: Reading from the NC also possible
– Output slots: Writing from the NC not permitted ⇒ alarm after run-up of the NC
References
NCU 7x0.3 PN, NCU 7x0.3B PN Manual, Section "Technical data" > Subsection "PLC" >
"Process image size"
Detailed information can be found at Address
view/de/54058408)
Note
I/O ranges for the write access (MD10510) on the PROFIBUS I/O must not be in the range
of the process image, e.g. PLC 317, output addresses 0 - 255.
Lengths of the I/O ranges
The lengths of the I/O ranges used are set via the following machine data:
● Length of the input range 1, 2, ... m:
MD10501 $MN_DPIO_RANGE_LENGTH_IN[ <n> ] = <length>; with <n> = 0, 1, 2, ... (m -
1)
● Length of the output range 1, 2, ... m:
MD10511 $MN_DPIO_RANGE_LENGTH_OUT[ <n> ] = <length>; with <n> = 0, 1, 2, ... (m
- 1)
If the value 0 is entered as length, the length of the first user data slot found under the specified
start address (MD10500/MD10510) is set internally as the length of the I/O range.
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
A4: Digital and analog NC I/O for SINUMERIK 840D sl
2.4 Direct I/O access without PLC
(http://support.automation.siemens.com/WW/
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