Siemens SIMATIC FM 351 - Evaluating the Diagnostic Information from the FM

6
6-9
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
You read the diagnostic information from the FM 351, depending on the pa-
rameter DIAGNOSTIC INTERRUPT, in OB1 or in an FC which is called
from OB 1.
STL Explanation
CALL DIAG_INF(
DB_NO := DB_ABS,
RET_VAL := Error code_read fct.
IN_DIAG := DIAGNOSTIC INTERRUPT);
A DIAGNOSTIC INTERRUPT;
JC NWE;
AN BR;
S Disp_error_readfct_Z;
NWE: NOP 0;
// Call FC DIAG_INF
// Parameter was set in OB 82
// Start bit is still set
// Communication error
// Display error during read function
You evaluate the diagnostic data via OB 82 or the channel DB. The parame-
ters which you can evaluate can be taken from the following table:
Table 6-3 Evaluating the Diagnostic Information from the FM 351
Error
Evaluation via OB 82
Channel DB via FC DIAG_INF
Byte Bit Channel DB via FC DIAG_INF
Module fault OB82_MDL_DEFECT
72
0 Bit 0 of DIAGNOSTIC_INT_INFO.BYTE0
Internal fault OB82_INT_FAULT 1 Bit 1 of DIAGNOSTIC_INT_INFO.BYTE0
External fault OB82_EXT_FAULT 2 Bit 2 of DIAGNOSTIC_INT_INFO.BYTE0
Channel error OB82_PNT_INFO 3 Bit 3 of DIAGNOSTIC_INT_INFO.BYTE0
No ext. aux. volt. OB82_EXT_VOLTAG 4 Bit 4 of DIAGNOSTIC_INT_INFO.BYTE0
Internal time monitoring OB82_WTCH_DOG_F 74 3 Bit 3 of DIAGNOSTIC_INT_INFO.BYTE2
Encoder wire break-
age
80
*
0 Bit 0 of DIAGNOSTIC_INT_INFO.BYTE8
error
Error, absolute en-
coder
1 Bit 1 of DIAGNOSTIC_INT_INFO.BYTE8
C
hannel
e
Error pulse, incre-
mental encoder
2 Bit 2 of DIAGNOSTIC_INT_INFO.BYTE8
C
h
Operational error 7 Bit 7 of DIAGNOSTIC_INT_INFO.BYTE8
Machine data error
81
*
0 Bit 0 of DIAGNOSTIC_INT_INFO.BYTE9
Error in incremental
table
1 Bit 1 of DIAGNOSTIC_INT_INFO.BYTE9
*
These details refer to Channel 1. The following values in the channel DB apply for Channel 2: Byte 82 and 83.
Calling the FC
DIAG_INF in OB 1
Diagnostic
Information
Programming the FM 351