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Diagnostics
Product manual | Version: 2.0.0
105
8DIO FLD EC DC 24V 2.0A
11.2.1.5 Subindex 4: New Messages Available
This subindex contains the subindex of the newest acknowledged diagnostic message. It
can be both read and written. In both cases, the meaning of the values depends on the
current mode. The modes are overwrite mode (subindex 5, bit 4 = 0) and acknowledge
mode (subindex 5, bit 4 = 1).
Overwrite Mode
0: The newest message has been read.
1: The newest message has not been read.
Acknowledgment Mode
0: No unacknowledged diagnostic message present
1: There are diagnostic messages that can be acknowledged.
11.2.1.6 Subindex 5: Flags
The subindex contains flags for controlling the sending and saving of diagnostic mes-
sages.
Table 73: Flags for Controlling the Sending and Saving of Diagnostic Messages
Bit 0: Enable emergency messages
0
Default, if the device cannot send emergency messages
1
New diagnostic messages are sent as emergency messages.
Bit 1: Disable info messages
0
Info messages are stored in the diagnostic message queue.
1
Info messages are not stored in the diagnostic message queue.
Bit 2: Disable warnings
0
Warnings are stored in the diagnostic message queue.
1
Warnings are not stored in the diagnostic message queue.
Bit 3: Disable error messages
0
Error messages are stored in the diagnostic message queue.
1
Error messages are not stored in the diagnostic message queue.
Bit 4: Mode selection for reaction to diagnostic history buffer overflow
0
Overwrite mode: If the buffer is full, old diagnostic messages are overwritten by new
ones.
1
Acknowledgment mode: New diagnostic messages only overwrite older messages if the
latter have been previously acknowledged.
Bit 5: Overwrite and discard information (read only)
In overwrite mode:
1
Unacknowledged diagnostic messages have been overwritten (= buffer overflow).
Subindex 3 was also set to 0.
In acknowledgment mode:
1
The buffer for diagnostic messages is full of acknowledged messages, and a new diag-
nostic message is discarded.
Bits 6 ... 15: reserved
