Siemens SINUMERIK 840C - Manual (Page 1070)

04.96 12 Functional Descriptions
12.28.8 Overview of function identifiers and configuring parameters (DB 2, DR 2 ... DR 6)
Example:
Parameterization of DB 2 for reading without acknowledgement of the signal path feedrate
(signal No. = 2) in the 3rd channel is as follows:
Byte no. Content Meaning
DL 0 0x01 Operation without acknowledgement/reading/set strobe
DR 0 -- Error code from NC (output parameter)
DL 1 0x13 Job number of PLC
DR 1 0x01 No. of the data transfer area
DL 2 0x10 Refresh rate NC
DR 2 0x03 Function ID of the service function
DL 3 0x00 Configuration parameter 1 LOW
DR 3 0x00 Configuration parameter 1 HIGH
DL 4 0x02 Configuration parameter 2 LOW = Signal No.
DR 4 0x00 Configuration parameter 2 HIGH = Signal No.
DL 5 0x00 Configuration parameter 3 LOW = Axis No.
DR 5 0x00 Configuration parameter 3 HIGH = Axis No.
DL 6 0x03 Configuration parameter 4 LOW = Channel/IKA No.
DR 6 0x00 Configuration parameter 4 HIGH = Channel/IKA No.
Writing these signals from the PLC is not permitted. If an attempt is made to perform a write
access, the error code 41 "Configuration parameter 2 incorrect" is indicated in DB 2 DR 0.
Examples for "Servo Trace" or high-speed data channel
The following abbreviations are used:
MW = Measured value, i.e. the measured value that can be read off in the trace curve or the
data transfer range of the "high-speed data channel" received on the PLC side.
RW = Real value, i.e. the measured value converted into the physical quantity. Usually, this
physical quantity has the same unit as in the part program, e.g. mm/min for the feedrate. This
unit is indicated in square brackets.
IT=Interpolation cycle [ms]
EF=Input resolution, corresponds to MD 5002.4-7
LF=Position controller resolution, corresponds to MD 18000.0-3
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 12–295
SINUMERIK 840C (IA)