QCPU的PID指令用ST語言做成功能塊使用, 有興趣的請參考, 下方程序是2個LOOP例子。
1. 做成2個功能塊,一個是PID_Initial, 另一個是PID_Control
2. PID_Initial 只要執(zhí)行一次, PID_Control每一個LOOP執(zhí)行一次。
3. PID_Initial 程序
DB_PID_2.Loops_Number:=2;
DB_PID_2.Loops_Execute:=1;
SD794:=HFFFF; SD795:=HFFFF; (* No Limit *)
DB_PID_2.Loop1_Operation:=1; (* 1=Reverse *)
DB_PID_2.Loop1_Ts:=10; (* Cycle Time *10ms *)
DB_PID_2.Loop1_Kp:=100; (* *0.01 *)
DB_PID_2.Loop1_Ti:=100; (* *0.1s *)
DB_PID_2.Loop1_Td:=100; (* *10ms *)
DB_PID_2.Loop1_Filter:=10;
DB_PID_2.Loop1_MVLL:=-32767;
DB_PID_2.Loop1_MVHL:=32767;
DB_PID_2.Loop1_DMVL:=100;
DB_PID_2.Loop1_DPVL:=100;
DB_PID_2.Loop1_sys1:=0;
DB_PID_2.Loop1_Kd:=800; (* *0.01 *)
DB_PID_2.Loop1_sys2:=0;
DB_PID_2.Loop1_sys3:=0;
BMOV( 1 , DB_PID_2.Loop1_Operation , 14 , DB_PID_2.Loop2_Operation );
S_PIDINIT( 1 , DB_PID_2.Loops_Number );
DB_PID_2.Loop1_SV:=0;
DB_PID_2.Loop1_PV:=0;
DB_PID_2.Loop1_MVman:=0;
DB_PID_2.Loop1_Auto:=0;
DB_PID_2.Loop1_Alarm:=0;
DB_PID_2.Loop2_SV:=0;
DB_PID_2.Loop2_PV:=0;
DB_PID_2.Loop2_MVman:=0;
DB_PID_2.Loop2_Auto:=0;
DB_PID_2.Loop2_Alarm:=0;
4. PID_Control程序
nAuto:=0;
IF Auto_Man THEN nAuto:=1; END_IF;
CASE Loop_Num OF
1:
DB_PID_2.Loop1_SV:=SV;
DB_PID_2.Loop1_PV:=PV;
DB_PID_2.Loop1_MVman:=MV_Man;
DB_PID_2.Loop1_Auto:=nAuto;
MV:=DB_PID_2.Loop1_MV;
2:
DB_PID_2.Loop2_SV:=SV;
DB_PID_2.Loop2_PV:=PV;
DB_PID_2.Loop2_MVman:=MV_Man;
DB_PID_2.Loop2_Auto:=nAuto;
MV:=DB_PID_2.Loop2_MV;
END_CASE;