Assignment Of The Db - Siemens simatic s7-400 FM 450-1 User Manual

Assignment of the DB

10.1 Assignment of the DB
DB for the FC°CNT_CTRL
All data associated with a channel of the module are located in the DB of FC CNT_CTRL.
The data structure and the length of the DB is determined by the variable declaration in
FC CNT_CTRL. Prior to configuring the module, the DB must have the following valid data
assigned to it (see section "Program (Page 45)"):
● Module address (address 6.0)
● Channel starting address (address 8.0)
● User data length (address 12.0)
The DB was generated from the UDT 1 as a data block with associated, user-specific data
type (see section "Program (Page 45)"). The DB assignments resulting from this are shown
below.
Table 10- 1 Assignment of the DB
Address Variable
0.0 AR1_BUFFER
4.0 FP
5.0 RESERVED
6.0 MOD_ADR
8.0 CH_ADR
12.0 U_D_LGTH
13.0 A_BYTE_0
14.0 LOAD_VAL
18.0 CMP_V1
1
22.0 CMP_V2
1
26.0 A_BIT0_0
26.1 TFB
26.2 A_BIT0_2
26.3 A_BIT0_3
26.4 A_BIT0_4
26.5 A_BIT0_5
26.6 A_BIT0_6
26.7 A_BIT0_7
27.0 ENSET_UP
27.1 ENSET_DN
Counter module FM 450-1
Manual, 02/2014, A5E03648739-02
Data type Initial value
DWORD DW#16#0
BYTE B#16#0
BYTE B#16#0
WORD W#16#0
DWORD DW#16#0
BYTE B#16#0
BYTE B#16#0
DINT L#0
1
DINT L#0
DINT L#0
BOOL FALSE
BOOL FALSE
BOOL FALSE
BOOL FALSE
BOOL FALSE
BOOL FALSE
BOOL FALSE
BOOL FALSE
BOOL FALSE
1
BOOL FALSE
1
Comment
AR1 buffer
Flag byte
Reserved
Module address
Channel address
User data length
Reserved
New load value (write user)
New comparison value 1 (write user)
New comparison value 2 (write user)
Reserved
Test enabled
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Enable setting in up direction (write user)
Enable setting in down direction (write user)
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