Siemens FM 450-1 - Page 94

Assignment of the Diagnostic Data Record DS0 and the Start Information
The table below shows the assignment of the diagnostic data record DS0 in the start
information. All bits not listed have no meaning and are zero.
Table 11-1 Assignment of diagnostic data record DS0
Byte Bit Meaning Remark Event no.
0 0 Module error Is set at each diagnostic event. 8:x:00
1 Internal error Is set for all internal faults:
• Fault in RAM TEST
• Watchdog timeout
• Lost hardware interrupt
8:x:01
2 External error Is set for all external faults:
• Auxiliary voltage 1L+/1M is not con‐
nected or 5.2 VDC encoder supply is
short circuited
• 5.2 VDC encoder supply short circuit‐
ed or overloaded.
• 5V signals faulty
• Faulty parameter assignment
8:x:02
3 Error in one channel 1 is always assigned for internal and ex‐
ternal faults.
8:x:03
4 External auxiliary voltage faulty 8:x:04
7 Faulty parameter assignment 8:x:07
1 0 ... 3 Type class Always assigned with 8.
4 Channel information Always assigned with 1.
2 3 Watchdog timeout 8:x:33
3 3 RAM defective 8:x:43
6 Hardware interrupt lost 8:x:46
Diagnostic data record DS1
Diagnostic data record DS 1 consists of 12 bytes. The 󹪝rst 4 bytes are identical to diagnostic data
record DS0. The following table shows the assignment of the remaining bytes. All bits not listed
have no meaning and are zero. This data record is entered into DB 1 from DW54 with the FC
DIAG_INF.
Table 11-2 Assignment of the bits of bytes 4 to 12 of the diagnostic data record DS1
Byte Bit Meaning Remark Event no.
4 0 ... 6 Channel type 76H is always assigned.
7 Other channel types 0 is always assigned.
5 0 ... 7 Diagnostic information length Always allocated to CH.
6 0 ... 7 Number of channels 2 is always assigned.
7 0 Channel fault vector Bit 0 = 1: Fault on channel 1
Bit 1 = 1: Fault on channel 2
Errors and diagnostics
11.3 Initiation of diagnostics interrupts
Counter module FM 450-1
94 Equipment Manual, 03/2022, A5E03648739-AC