Siemens simatic s7-400 FM 450-1, User Manual, Page: 103 / 130

Counter module FM 450-1
Manual, 02/2014, A5E03648739-02
103
Assignment of the DB
10
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 Data type Initial value Comment
0.0 AR1_BUFFER DWORD DW#16#0 AR1 buffer
4.0 FP BYTE B#16#0 Flag byte
5.0 RESERVED BYTE B#16#0 Reserved
6.0 MOD_ADR WORD W#16#0 Module address
8.0 CH_ADR DWORD DW#16#0 Channel address
12.0 U_D_LGTH BYTE B#16#0 User data length
13.0 A_BYTE_0 BYTE B#16#0 Reserved
14.0 LOAD_VAL
1
DINT L#0 New load value (write user)
18.0 CMP_V1
1
DINT L#0 New comparison value 1 (write user)
22.0 CMP_V2
1
DINT L#0 New comparison value 2 (write user)
26.0 A_BIT0_0 BOOL FALSE Reserved
26.1 TFB BOOL FALSE Test enabled
26.2 A_BIT0_2 BOOL FALSE Reserved
26.3 A_BIT0_3 BOOL FALSE Reserved
26.4 A_BIT0_4 BOOL FALSE Reserved
26.5 A_BIT0_5 BOOL FALSE Reserved
26.6 A_BIT0_6 BOOL FALSE Reserved
26.7 A_BIT0_7 BOOL FALSE Reserved
27.0 ENSET_UP
1
BOOL FALSE Enable setting in up direction (write user)
27.1 ENSET_DN
1
BOOL FALSE Enable setting in down direction (write user)