Siemens SIMATIC FM 453, Manual

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6-18
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
6.4 Reading Diagnostic Information
FC DIAG_RD (FC 4) and FC DIAG_INF (FC 6) are used to read the diag-
nostic interrupt information for all three channels in the user DB.
FC 4 and FC 6 are intended as alternatives which you can use according to
your needs.
6.4.1 FC DIAG
_
RD (FC 4) – Read Diagnostic Interrupt Data in OB 82
You are only allowed to call FC DIAG_RD in interrupt OB 82.
Call in LAD Notation
(ladder diagram)
Call in STL Notation
(statement list)
EN ENO
FC DIAG_RD
DB_NO
RET_VAL
IN_DIAG
CALL DIAG_RD(
DB_NO := ,
RET_VAL := ,
IN_DIAG := );
The following table describes the parameters of the FC DIAG_RD
.
Name Data
Type P
Type
Meaning
DB_NO WORD I Data block number
RET_VAL INT Q Return code of SFC 59 “RD_REC”
IN_DIAG BOOL I/O Initiate reading of diagnostic data; is cleared after
execution of FC 4.
Parameter types: I = input parameter, Q = output parameter,
I/O = in/out parameter (initiation parameter)
This function works together with a user DB. The DB number is passed when
you call the function with the DB_NO parameter.
Reading of the diagnostic interrupt data DIAGNOSTIC_INT_INFO (in user
DB starting at address 72) is started when you set the in/out parameter
IN_DIAG to one. The parameter is reset by the FC after the job is executed.
Overview
Task
Call Options
Description of
Parameters
Principle of
Operation
Programming the FM 453