Siemens SIMATIC ET 200SP Manuel - Page 22

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Diagnostics, error and system alarms

5.4 Device-specific diagnostics with DP-V1

5.4

Device-specific diagnostics with DP-V1

Device-specific diagnostics

The device-specific diagnostics of DP V1 slaves is available in two variants:

● Interrupt type

● Status type

The two variants differ in the coding of byte 1, bit 7 of the device-specific diagnostic data.

The distinction is component-specific.

Byte 0: Header

The two most significant bits have the value 00. This identifies the "Module-specific

diagnostic data" block as a whole (see bytes 4...62).

The remaining six bits indicate the length of the data block including byte 0.

Byte 1: "Interrupt type" variant

Table 5- 6

Bit no.

6...0

Older status interrupts can be overwritten by newer ones when status interrupts occur in

rapid succession.

Structure of byte 1 of the device-specific diagnostics ("Interrupt type" variant)

Value

Meaning

Interrupt

Alarm_Type

- Reserved -

Diagnostic interrupt

Process interrupt

Pull interrupt

Plug interrupt

Status interrupt

Update interrupt

7...31

- Reserved -

32...126

Manufacturer-specific

127

- Reserved -

Meaning

Communication module CM DP (6ES7545-5DA00-0AB0)

Manual, 12/2014, A5E33619758-AB