Siemens SIMATIC ET 200iSP Operating Instructions Manual page 208

Commissioning and Diagnostics
7.13 Diagnostics with STEP 7 with PROFIBUS
Channel-related diagnostics
The maximum number of channel-related diagnostics is limited by the maximum total length of
the device diagnostics of 96 bytes with IM 152-1DP. The length of the device diagnostics
depends on the number of channel-related diagnostics currently present. If there are more
channel-related diagnostics than can be shown in the device diagnostics, bit 7 "Diagnostics
overflow" is set in station status 3.
Table 7-36
Byte
Byte x
Byte x+1
Byte x+2
Byte x+3
... x+5
... up to max. byte 95 for IM 152-1DP
Error types of the electronic modules
See Error types of the electronic modules with PROFIBUS (Page 209).
208
Configuration of the channel-related diagnostics from byte 25 (without deselection of the
diagnostics in the configuration)
7 6 5 4 3 2 1
1 0
0 Description
Bit 0 to 5: 00001 to 100010
B
module that supplies channel-related diagnostics
(Example: Slot 4 has the identification number 3; slot 5 has
the identification number 4, etc.)
Bit 6 and Bit 7: Code for channel-related diagnostics (for
00 , see section "Interrupts in PROFIBUS (Page 212)")
B
Bit 0 to 5: 00000 to 11111
B
channel group that provides diagnostics
Bit 6 and Bit 7: Input/output:
• 01 : Entry
B
• 10 : Output
B
• 11 : Input/output
B
Bit 0 to Bit 4: Error type according to PROFIBUS standard
Bit 5 to bit 7: Channel type
• 001 : Bit
B
• 010 : 2 bit
B
• 011 : 4 bit
B
• 100 : Byte
B
• 101 : Word
B
• 110 : 2 words
B
Next channel-related diagnostic message (assignment like
byte x to x+2)
Operating Instructions, 11/2022, A5E00247483-AK
: Identification number of the
B
: Number of the channel or
B
ET 200iSP