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Appendix F: Diagnostic Data Format

134 Siemens Energy & Automation, Inc.

F Diagnostic Data Format

When users select Diagnostic Information to be writ-

ten to the PLC, 6 registers will automatically be

updated in the PLC with the diagnostic information.

The location of this block of 6 consecutive registers in

the PLC is specified by the user.

The format of this register block follows:

Table F.1 Diagnostics Register Block Format

Offset in

0 Device communication status for devices 1

–16, 1 bit per device

Bit 0: Set if Device 1 is not communicating

Bit 1: Set if Device 2 is not communicating

...

Bit 14: Set if Device 15 is not communicating

Bit 15: Set if Device 16 is not communicating

1 Device communication status for devices 17

–32, 1 bit per device

Bit 0: Set if Device 17 is not communicating

Bit 1: Set if Device 18 is not communicating

...

Bit 14: Set if Device 31 is not communicating

Bit 15: Set if Device 32 is not communicating

2 Count of “no responses” from ACCESS devices (low order word)

3 Count of “no responses” from ACCESS devices (high order word)

4 Count of responses received from ACCESS devices in which data transmission errors occurred (low order word)

5 Count of responses received from ACCESS devices in which data transmission errors occurred (high order word)

1 2 ... 133 134 135 136 137 138 139 140 141

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Siemens DTU3005-B Manuale dell'Operatore Pagina 138