Siemens SIMATIC ET 200iSP

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
over󹪞ow" is set in station status 3.
Table 7-36 Con󹪝guration of the channel-related diagnostics from byte 25 (without deselection of the
diagnostics in the con󹪝guration)
Byte 7 6 5 4 3 2 1 0 Description
Byte x 1 0 Bit 0 to 5: 00001
B
to 100010
B
: Identi󹪝cation number of the
module that supplies channel-related diagnostics
(Example: Slot 4 has the identi󹪝cation number 3; slot 5 has
the identi󹪝cation number 4, etc.)
Bit 6 and Bit 7: Code for channel-related diagnostics (for
00
B
, see section "Interrupts in PROFIBUS (Page 212)")
Byte x+1 Bit 0 to 5: 00000
B
to 11111
B
: Number of the channel or
channel group that provides diagnostics
Bit 6 and Bit 7: Input/output:
• 01
B
: Entry
• 10
B
: Output
• 11
B
: Input/output
Byte x+2 Bit 0 to Bit 4: Error type according to PROFIBUS standard
Bit 5 to bit 7: Channel type
• 001
B
: Bit
• 010
B
: 2 bit
• 011
B
: 4 bit
• 100
B
: Byte
• 101
B
: Word
• 110
B
: 2 words
Byte x+3
... x+5
Next channel-related diagnostic message (assignment like
byte x to x+2)
... 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).
Commissioning and Diagnostics
7.13 Diagnostics with STEP 7 with PROFIBUS
ET 200iSP
208 Operating Instructions, 11/2022, A5E00247483-AK