Siemens Simatic SM331 - Page 72

Appendix
A.1 Source of the user program
SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA
A-4 Getting Started, 11/2006, A5E00253410-02
U
SPBN
L
SSI
T
lbl0: NOP
M
lbl0;
MW
4;
MW
0;
200.0;
100;
100;
NETWORK
TITLE =The End
BE;
END_ORGANIZATION_BLOCK
ORGANIZATION_BLOCK OB 40
TITLE = "Hardware Interrupt"
// Processing OB40_POINT_ADDR (L8 to L11)
//
//L8 High limit value exceeded
//L9 Low limit value exceeded
VERSION : 1.0
VAR_TEMP
OB40_EV_CLASS : BYTE ; //Bits 0-3 = 1 (Coming event),
Bits 4-7 = 1 (Event class 1)
OB40_STRT_INF : BYTE ; //16#41 (OB 40 has started)
OB40_PRIORITY : BYTE ; //Priority of OB Execution
OB40_OB_NUMBR : BYTE ; //40 (Organization block 40, OB40)
OB40_RESERVED_1 : BYTE ; //Reserved for system
OB40_IO_FLAG : BYTE ; //16#54 (input module), 16#55 (output module)
OB40_MDL_ADDR : WORD ; //Base address of module initiating interrupt
OB40_POINT_ADDR : DWORD ; //Interrupt status of the module
OB40_DATE_TIME : DATE_AND_TIME
;
//Date and time OB40 started
END_VAR
BEGIN
NETWORK
TITLE =Sensor 1 (Channel 0): Lower limit value
U L 9.0; // Channel 0 low limit value
SPBNB L001;
L W#16#1;
L MW 100;
OW ;
T MW 100;
L001; NOP 0;
NETWORK
TITLE =Sensor 1 (Channel 0): Upper limit value
U L 8.0; // Channel 0 upper limit value
SPBNB L002;
L W#16#2;
L MW 100;
OW ;
T MW 100;