With programmable diagnostic events a message only occurs if you have enabled diag-
nostic by parameter assignment. Non-programmable diagnostic events are always
reported, regardless of whether or not diagnostic has been enabled.
A diagnostic entry can be written to the diagnostic buffer by means of the system function
SFC 52 WR_USMSG.
You can use the SFC 59 RD_REC (read record set) in OB 82 to obtain detailed error
information. The diagnostic data are consistent until OB 82 is exited. Exiting of OB 82
acknowledges the diagnostic interrupt. The module's diagnostic data are in record set 0
(DS 0) and record set 1 (DS 1). DS 0 contains 4byte, which describe the current status of
the module. The contents of these bytes are identical to the contents of byte 8 ... 11 of the
start information of OB 82. DS 1 contains the 4 byte of DS 0 and, in addition, the module
specific diagnostic data. More information about module specific diagnostic data can be
found at the description of the appropriate module.
Information to access the local data can be found at the description of the OB 1. The fol-
lowing table describes the start information of the OB 82 with default names of the varia-
bles and its data types:
Variable Data type Description
OB82_EV_CLASS BYTE Event class and identifiers:
38h: outgoing event
39h: incoming event
OB82_FLT_ID BYTE Error code (42h)
OB82_PRIORITY BYTE Priority class: can be assigned via hardware configuration
OB82_OB_NUMBR BYTE OB-NO. (82)
OB82_RESERVED_1 BYTE reserved
OB82_IO_FLAG BYTE Input module 54h
Output module 55h
OB82_MDL_ADDR INT Logical base address of the module where the fault
occurred
OB82_MDL_DEFECT BOOL Module fault
OB82_INT_FAULT BOOL Internal error
OB82_EXT_FAULT BOOL External error
OB82_PNT_INFO BOOL Channel error exists
OB82_EXT_VOLTAGE BOOL External power supply was not found
OB82_FLD_CONNCTR BOOL Front plug not found
OB82_NO_CONFIG BOOL Module is not configured
OB82_CONFIG_ERR BOOL Wrong parameters in module
Configurable Diagnostics
Write diagnostic data with
SFC
Read diagnostic data with
SFC 59
Local data
VIPA SPEED7
Organization Blocks
Asynchronous error Interrupts > OB 82 - I/O_FLT1 - Diagnostic Interrupt
HB00 | OPL_SP7 | Operation list | en | 18-30 88
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