Parameter Access Functionality - Siemens SINAMICS G120 Manual

5 Functional Mechanisms of this Application

5.4 Parameter access functionality

5.4 Parameter access functionality
Figure 5-17
OB 1
"CYCL_EXC"
OB 35
"CYC_INT5"
Acyclic parameter access occurs parallel to the cyclic process data exchange. This
saves resources, since this connection is only established on demand, i.e. when
accessing a parameter.
In SIMATIC S7-300/400F, the "Write data record" and "Read data record" functions
must be used. Data record 47 must always be used.
Writing data record 47 sends a job to the SINAMICS G which performs the job and
provides a response. Reading data record 47 makes the response of SINAMICS G
available in SIMATIC S7-300/400F and can be evaluated.
For reading and writing data records, the system function blocks SFB 53 "WRREC"
and SFB 52 "RDREC" are used in SIMATIC S7-300/400F.
For the Data record 47 please refer to
systems (/9/)
Note Since SFB 53 "WRREC" and SFB 52 "RDREC" are not used with CP341-1, the
parameter access is not possible when using this CP.
SINAMICS G120C at S7-300/400F-DP
Beitrags-ID: 60441457, V2.2,
FC 5 "setpoint_
simulation"
FB 10 "process data"
DB 10
"idb process data"
FB 20 "parameter SFB 53 "WRREC"
access"
SFB 52 "RDREC"
DB 20 "idb parameter access"
FC 200 "F-CALL"
FB 200 "safety"
DB 200
"idb safety"
11/2014
DB 100 "write drive
parameter"
DB 102 "answer
from drive_write"
DB 101 "read drive
parameter"
DB 103 "answer
from drive_read"
chap. 3.1.2 in the function manual Fieldbus
58