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6 Diagnostics and Interrrupts of the CP 343-2
6.4
Response to Interrupts in Different CP Operating States
The CP 343-2 generates diagnostic interrupts triggered by external interrupt events
only in the protected mode and not in the configuration mode.
If the PLC CPU changes to STOP, the internal interrupt history is reset; in other
words, the bit OB82_MDL_DEFECT and all other error bits in DS 0 are reset.
If there is a change from the protected mode to the configuration mode, the
external interrupt history is reset. If the CP 343-2 changes from the configuration
mode to the protected mode and if there is a configuration error at this point in
time, this is signaled with a diagnostic interrupt. If it is temporarily not possible to
issue a diagnostic interrupt (for example, because the PLC is in the STOP mode),
a diagnostic interrupt is generated at the next possible time only if the problem still
exists.
6.5
Local Data of the Diagnostic Organization Block (OB82)
The following table shows the DS 0 available in the local data of OB82 (local byte 8
to local byte 11). For the meaning of the other OB82 local data, please refer to the
STEP 7 descriptions.
Byte Bit
Variable Name
0
8
2
OB82_MDL_DEFECT
1
8
2
OB82_INT_FAULT
2
8
2
OB82_EXT_FAULT
3
8
2
OB82_PNT_INFO
4
8
2
OB82_EXT_VOLTAGE
5
8
2
OB82_FLD_CONNCTR
6
8
2
OB82_NO_CONFIG
7
8
2
OB82_CONFIG_ERR
0
9
2
...
OB82_MDL_TYPE
3
2
4
9
2
OB82_MDL_TYPE
5
9
2
OB82_MDL_TYPE
106
Data Type Meaning
BOOL
Group error bit (0: interrupt leaving
state, 1: interrupt entering state)
BOOL
Internal CP error (for example
EEPROM defective).
BOOL
External CP error (for example slave
failed or APF).
BOOL
At least one slave differs from the
expected configuration.
BOOL
Voltage on the AS-Interface too low
(APF).
BOOL
with the CP 343-2 always 0
BOOL
with the CP 343-2 always 0
BOOL
with the CP 343-2 always 0
−
Module class, for CP 343–2: C
BOOL
with the CP 343-2 always 1
BOOL
reserved
CP 343−2 / CP 343−2 P AS−Interface Master
hex
Release 08/2008
C79000−G8976−C149−04
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