Request Interface - Siemens SINUMERIK 840D sl Function Manual

A2: Various NC/PLC interface signals and functions
2.3 Functions
Motor and drive data sets in the drive
Formatting depends on the number of motor data sets (MDS) and drive data sets (DDS) in the
drive. The number can be determined using the following drive parameters:
● p0130 (number of motor data sets)
● p0180 (number drive data sets)
Validity of the interfaces
After powering up, as soon as the control has received all the required information from the
drive and this has been evaluated by the NC, the request (Page 66) and display interfaces
(Page 67) are shown as valid:
DB31, ... DBX130.7 == 1 (request and display interfaces valid)
If no or incompatible information is transferred from the drive, the request and display interfaces
are shown as invalid.
Note
With invalid request and display interfaces, it however remains the sole responsibility of the
user / machine manufacturer to perform a data set switchover via the invalid request and
display interfaces.
See also
Example (Page 67)
Overview of the interfaces (Page 68)
2.3.6.3

Request interface

The switchover to a new motor (MDS) and/or drive data sets (DDS) is requested via the
interface:
DB31, ... DBX21.0 - .4 = <MDS/DDS index>
Value range
Addressing a motor or drive data set n, with n = 1, 2, 3, ..., is realized based on its index i, with
i = n - 1 = 0, 1, 2, ...
● Motor data sets: MDS[ 0, 1, 2, ... 15 ]
● Drive data sets: DDS[ 0, 1, 2, ... 31 ]
Formatting interfaces
Formatting the request interface, i.e. which bits are used to address the motor data sets (MDS)
– and which are used to address the drive data sets (DDS) is set via the formatting interface
(Page 65).
66
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions