Siemens SIMATIC S7-300 Manual page 172

Human-machine interface
8.3 Data block for status messages (DB-SS)
Overview The following table contains the parameters/data which are readable during
operation.
Table 8-4 Parameters/data of DB-SS
Byte Variable type
0...35
36...59
1)
Offset Variable type
24 8 x BOOL
25 8 x BOOL
26 2 x BYTE
28 2 x BYTE
30 8 x BOOL
31 8 x BOOL
32 BYTE
33 8 x BOOL
34 BYTE
35 8 x BOOL
36 12 x BYTE
48 DWORD
52 DWORD
56 DWORD
60 DWORD
64 DWORD
68 STRUCT MDI block struc-
ture
88 16 x BOOL
90 16 x BOOL
92 DINT
96 DINT
100 DINT
104 16 x BOOL
106 STRUCT MDI block struc-
ture
126 BYTE
1) A variable in the S7 protocol is addressed by the DB No. and, depending on data format, by the DBB, DBW and DBD
No. (offset in DB), as well.
8-20
Value Significance of the variables
DB header
Internal header information
Value Significance of the variables
Control signals
Control signals
Control signals
Control signals
Checkback signals
Checkback signals
Checkback signals
Checkback signals
Checkback signals
Checkback signals
Reserved
Velocity level 1
Velocity level 2
Control level 1
Control level 2
Setpoint for incremental value
MDI block
Single functions
Single commands
Zero offset
Set actual value
Set actual value on the fly
Digital inputs/outputs
MDI block on the fly
Program selection
Comment
Comment
Byte 0
Byte 1
Byte 2, 3
Byte 4, 5
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Program number
FM 354 Servo Drive Positioning Module