Device-Specific Diagnostics With Dp-V1 - Siemens SIMATIC ET 200SP Manual

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.
7
6...0
Older status interrupts can be overwritten by newer ones when status interrupts occur in
rapid succession.
22
Structure of byte 1 of the device-specific diagnostics ("Interrupt type" variant)
Value Meaning
0 Interrupt
Alarm_Type
0 - Reserved -
1 Diagnostic interrupt
2 Process interrupt
3 Pull interrupt
4 Plug interrupt
5 Status interrupt
6 Update interrupt
7...31 - Reserved -
32...126 Manufacturer-specific
127 - Reserved -
Meaning
Communication module CM DP (6ES7545-5DA00-0AB0)
Manual, 12/2014, A5E33619758-AB