Principle Of Communication Between The Cpu And Fm - Siemens SIMATIC FM 351 Installation Manual

Communication
The following summarizing figure shows you how a communication is
executed.
The following abbreviations are used in the figure:
User program
DB1 for
channel 1
CALL INC_MOD(
DB_NO = DB1
CALL REF_MODE(
DB_NO = DB1
CALL INC_MOD(
DB_NO = DB1
DB2 for
CALL JOG_MODE(
channel 2
DB_NO = DB2
CALL SNG_FCT(
DB_NO = DB1
CALL DIAG_INF(
DB_NO = DB1
Figure 6-1 Principle of Communication between the CPU and FM 351
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
MD = Machine data
IT = Incremental table (set values)
DB* = Channel DB for channel *
FC INC_MOD
FC SNG_FCT
FC
REF_MODE
FC
JOG_MODE
FC DIAG_INF
Programming the FM 351
FM 351 job
processing
CPU FM 351
IT 1
MD 1
6
IT 2
MD 2
Dia-
gnostic
data
6-5