Device-Specific Diagnostics In Dp-V1 - Siemens S7-1500 PROFIBUS Operating Instructions Manual

Bytes 4 and 5: Vendor ID of the slave ("Ident_Number")
The vendor ID ("Ident_Number") for the DP slave type is entered in bytes 4 and 5. This
identifier can be used to identify the slave.
The more significant part of the value is in byte 5.
4.1.4

Device-specific diagnostics in DP-V1

There are two variants of device-specific diagnostics with DP-V1 slaves:
• Interrupt type
• Status type
The two variants differ from each other in the coding of byte 1, bit 7 of the device-specific
diagnostics data. The difference is component-specific.
Byte 0: Header
The two most significant bits have the value 00. This identifies the "module-specific
diagnostics data" field (see bytes 4... 62) as a whole.
The remaining six bits indicate the length of the data field including byte 0.
Byte 1: Variant "Interrupt type"
Table 4- 5
Bit no.
7
6...0
If status interrupts are received in quick succession, older status interrupts may be
overwritten by newer interrupts.
SIMATIC CM 1542-5
Operating Instructions, 01/2023, C79000-G8976-C290-07
Structure of byte 1 of the device-specific diagnostics (variant "interrupt type")
Value Meaning
0 Interrupt
Alarm_Type
0 - reserved -
1 Diagnostics interrupt
2 Hardware interrupt
3 Pull interrupt
4 Plug interrupt
5 Status interrupt
6 Update interrupt
7...31 - reserved -
32...126 Vendor-specific
127 - reserved -
Diagnostics and upkeep
Meaning
4.1 Diagnostics
47