Siemens SIMATIC FM 353 Manual page 239

Example 1
The software limit switches (MD21, MD22) for the axis are to be set to the values
100 mm and 50,000 mm. These values are to remain in effect only until the unit is
shut down.
DB type
Data number
Number of data
Job type
Data array
Byte 200 −203
Byte 204 − 207
Bytes from 208 on
For activation of the machine data, see Section 9.3.3
Notes
Please note the following when changing the parameter data:
S Machine data
Machine data can always be modified. Once you have modified the machine
data, the machine data have to be reactivated (for single command, see Sec-
tion 9.3.3).
S Increments
Modifications can be made in all operating modes (even in "Incremental rela-
tive" mode) during movement. The modifications of the increments must always
be complete before a new movement is started in "Incremental relative" mode.
If this is not the case, the error message "incremental dimensions do not exist"
is output Cl. 2/No. 13.
S Tool offset data
Modifications can be made in all operating modes and during movement. If
modifications are made during starting or at block transitions when the tool
compensation is active (internal access to offset values), the error message
"tool offset value does not exist" is output Cl.3/No.35.
S Traversing programs
− Programs which are not selected can always be modified.
− If modifications are made to a preselected program, including the subpro-
gram, preselection of the program is canceled. You must then select the pro-
gram again. A modification can be made to a program when BL = 0 (start of
program/end of program) and on Stop.
Delete block: Specify the program no. and the block no. in the "data field".
Insert block: The block number does not exist in the selected program.
Modify block: The block with the corresponding block number is
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
= 1
= 21
= 2
= 2
= 100,000 (MD21, data format DINT)
= 50,000,000 (MD22, data format DINT)
= 0
The other data/bits must not be assigned.
The contents should be entered in accordance with
the "block format".
overwritten with the contents in accordance with "block format".
Description of Functions
9-39