Siemens SIMATIC NET CP 142-2, Manual, Page: 35 / 84

B8976111/02 AS-i Master Module CP 142-2
3-13
Byte Bit Variable Name Data type Meaning
11
2
6
OB82_HW_INTR_FLT BOOL always 0 for the CP 142-2
11
2
7
OB82_RESERVED_3 BOOL always 0 for the CP 142-2
3.3.2.6 Reading the Diagnostic Data Record DS1
The CP 142-2 continuously updates a delta list containing all the slaves that deviate from the
configuration, in other words, missing, incorrect or not configured (but existing) slaves (each slave is
assigned one bit in the delta list: 0 = no error; 1 = error). This delta list is part of the diagnostic data
record DS1 and you can read it out by calling the operating system function SFC59 (“RD_REC”) in
the interrupt OB (OB82) or at any time in the cyclic program (OB1).
For the CP 142-2, data record DS 1 always has a length of 11 bytes and is structured as follows:
Bytes 0 to 3: These four bytes contain DS0 and correspond to the local data bytes 8 to 11 in
OB82 (see Section 3.3.2.5)
Byte 4
7
60
H
0 Bit no.
Byte 7
7 0
Fixed value
Byte 8
7 0
Byte 5
00
H
Byte 6
20
H
Slave 7 Slave 0
Byte 9
7 0
Slave 15 Slave 8
Byte 10
7 0
Slave 23 Slave 16
Delta list
Slave 31 Slave 24
Figure 3-4: Content of Data Record 1 Bytes 4 to 10