Siemens SIMATIC S7-1200 - Page 477

Extended instructions
9.7 Diagnostics (PROFINET or PROFIBUS)
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
477
Table 9- 171 Example 2: A module has been pulled from PROFIBUS slave device "DPSlave_12". A
value of 0x0900_0000 is returned for MODE 2 (Module defective).
Byte with value
Bit pattern with value
Notes
Byte 1 0x09
Bit 7 0000-1001 Bit 0
Bit 0 is true; data is available.
Byte 2 0x00 Bit 15 0000-0000 Bit 8
Byte 3 0x00
Bit 23 0000-0000 Bit 16
Byte 4 0x00
Bit 31 0000-0000 Bit 24
Only module 3 (Bit 3) is marked as defective. All other modules are functional.
Table 9- 172 Example 2 (continued): A module has been pulled from PROFIBUS slave device
"DPSlave_12". A value of 0x1700_0000 is returned for MODE 4 (Module exists).
Byte with value
Bit pattern with value
Notes
Byte 1 0x17
Bit 7 0001-0111 Bit 0
Bit 0 is true; data is available.
Byte 2 0x00
Bit 15 0000-0000 Bit 8
Byte 3 0x00
Bit 23 0000-0000 Bit 16
Byte 4 0x00
Bit 31 0000-0000 Bit 24
Module 3 (Bit 3) is shown as missing. Modules 1, 2, and 4 (Bits 1, 2, and 4) are shown as existing.
Table 9- 173 Example 3: PROFIBUS slave device "DPSlave_12" is disconnected (cable disconnected
or power loss) from the PROFIBUS network. A value of 0x1F00_0000 is returned for
MODE 2 (Module defective).
Byte with value
Bit pattern with value
Notes
Byte 1 0x1F
Bit 7 0001-1111 Bit 0
Bit 0 is true; data is available.
Byte 2 0x00
Bit 15 0000-0000 Bit 8
Byte 3 0x00
Bit 23 0000-0000 Bit 16
Byte 4 0x00
Bit 31 0000-0000 Bit 24
The modules in slots 1 through 4 (Bits 1 through 4) are all marked as defective since the device is
missing.
MODE 5 (Problem in module) shows the same information as MODE 2 (Module defective).