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Data blocks (DB)
Table 5-1 gives you an overview of the data blocks in the FM 453 and their
of the FM 453
meaning.
Table 5-1
DB-MD
DB-SM
DB-TO
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
Data Blocks of the FM 453
Data Block
Machine data
DB No. = 1205 for channel 1
DB No. = 1505 for channel 2
DB No. = 1805 for channel 3
Block size (rounded in bytes) = 300
Machine data serves to adapt the FM 453 to the user's own specific
application. Parameterization with machine data is essential in order
for the FM's functions to be activated for each channel. The parame-
terized DB-MD should be loaded to the FM. As it is written to the
FM 453, the DB-MD is checked for the input limits of the individ-
ual values and their interdependencies. It is then stored only if all
values are allowed. Otherwise data error messages are displayed by
way of the MPI. A defective DB will not be retained when the
power is turned off.
The machine data can then be activated by way of "Activate ma-
chine data" or by switching the equipment on and off.
Increments
DB No. = 1230 for channel 1
DB No. = 1530 for channel 2
DB No. = 1830 for channel 3
Block size (rounded in bytes) = 460
Increments serve in the "Relative incremental" operating mode as
user-definable relative path distances for individual positioning. You
can define from 1 to 100 increment sizes (see Section 5.3.2).
Modifications can be made in all operating modes (even in "Incre-
mental relative" 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.
Tool offset data
DB No. = 1220 for channel 1
DB No. = 1520 for channel 2
DB No. = 1820 for channel 3
Block size (rounded in bytes) = 310
The use of tool length compensation and wear values is described in
Section 10.1. Up to 20 compensation or wear values are available.
Tool offset data are required for the "Automatic and Automatic
single block" modes.
Modifications can be made in all operating modes and during move-
ment. If modifications are made during starting or at block transi-
tions 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.
Defining Parameters of the FM 453
Significance
5-7
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