Siemens SIMATIC FM 351 - Principle of Communication between the CPU and FM

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