Technical data

Appendix
27.6 Sample Programs
Programming with STEP 7
Manual, 05/2010, A5E02789666-01 651
Network 5 Feed valve control for ingredient A
AN "Flow_A"
AN "Feed_pump_A"
= #Close_Valve_Fulfilled
CALL "Valve_block"
Open :=#Enable_Valve
Close :=#Close_Valve_Fulfilled
Dsp_Open :=#Feed_Valve_A_Open
Dsp_Closed:=#Feed_Valve_A_Closed
Valve :="Feed_Valve_A"
Network 6 Interlocks for feed pump B
A "EMER_STOP_off"
A "Tank_below_max"
AN "Drain"
= "Enable_Motor
Network 7 Calling FB Motor for ingredient B
A "Feed_pump_B_start"
A #Enable_Motor
= #Start_Fulfilled
A(
O "Feed_pump_B_stop"
ON #Enable_Motor
)
= #Stop_Fulfilled
CALL "Motor_block", "DB_feed_pump_B"
Start :=#Start_Fulfilled
Stop :=#Stop_Fulfilled
Response :="Flow_B"
Reset_Maint :="Reset_maint"
Timer_No :=T14
Reponse_Time:=S5T#7S
Fault :="Feed_pump_B_fault"
Start_Dsp :="Feed_pump_B_on"
Stop_Dsp :="Feed_pump_B_off"
Maint :="Feed_pump_B_maint"
Motor :="Feed_pump_B"
Network 8 Delaying the valve enable ingredient B
A "Feed_pump_B"
L S5T#1S
SD T 15
AN "Feed_pump_B"
R T 15
A T 15
= #Enable_Valve