INCON-M84/M86/M86R Manual

2.6.5 Sample: Use ENU to Create the Second Machine Panel

After organizing the function key and signal lights of the second machine panel, the second machine panel use ENU to connect with the CNC controller and assume the ENU setting as the first I/O unit.

Step 1

Create the key scanning electric circuit drawing.

Key Scanning Electric Circuit Drawing

Step 2

Declare each key.

int key1,key2,key3,key4,key5,key6,key7,key8,

key9,key10,key11,key12,key13,key14,key15,key16；

Within the PLC define the data line (I1, I2, I3, I4).

At PLC definition scan line (Y1, Y2, Y3, Y4).

The function of each key within PLC.

Step 3

Inside PLC Run to write the program of the scanning input button.

switch(secondPanelKeyScan){

   case 0:

      Y1 = 1;

      Y2 = 0;

      Y3 = 0;

      Y4 = 0;

      secondPanelKeyScan ++;

      break;

   case 1:

      key1 = I1;

      key2 = I2;

      key3 = I3;

      key4 = I4;

      Y1 = 0;

      Y2 = 1;

      Y3 = 0;

      Y4 = 0;

      secondPanelKeyScan ++;

      break;        

       

   case 2:

      key5 = I1;

      key6 = I2;

      key7 = I3;

      key8 = I4;

      Y1 = 0;

      Y2 = 0;

      Y3 = 1;

      Y4 = 0;

      secondPanelKeyScan ++;

      break;        

       

   case 3:

      key9 = I1;

      key10 = I2;

      key11 = I3;

      key12 = I4;

      Y1 = 0;

      Y2 = 0;

      Y3 = 0;

      Y4= 1;

      secondPanelKeyScan ++;

      break;

       

   case 4:

      key13 = I1;

      key14 = I2;

      key15 = I3;

      key16 = I4;

      Y1 = 1;

      Y2 = 0;

      Y3 = 0;

      Y4 = 0;          

      secondPanelKeyScan  = 1;

      break;

}

Step 4

Within PLC Run define the corresponding function of each button, for example: KEY_CycleStart corresponds to PLC output plc.vto0.bit.clsrt, as a start signal to notify NC program.

void PLCAPI plcRun(Status & sts, PlcBlock & plc){

   ……………………………;

   plc.vto0.bit.clsrt=KEY_CycleStart;

   plc.vto0.bit.fhold=KEY_FeedHold;

   ……………………………;    

}

Step 5

Draw button LED light output scanning electric circuit drawing.

LED Light Output Scanning Electric Circuit Drawing

Step 6

Declare each key.

int LED1,LED2,LED3,LED4,LED5,LED6,LED7,LED8,

   LED9,LED10,LED11,LED12,LED13,LED14,LED15,LED16；

Within PLC define the definition of data line (Y5, Y6, Y7, Y8).

Within PLC define scan line (Y1, Y2, Y3, Y4).

Within PLC define the function of each LED button.

Step 7

With PLC Run of scan input key of program adds the program of scan LED key, the state of LED1~LED16 is executed by other parts of PLC Run.

switch(secondPanelKeyScan){

   case 0:

      Y1 = 1;

      Y2 = 0;

      Y3 = 0;

      Y4 = 0;

      Y5 = !LED1;

      Y6 = !LED2;

      Y7 = !LED3;

      Y8 = !LED4;

      secondPanelKeyScan ++;

      break;

   case 1:

      key1 = I1;

      key2 = I2;

      key3 = I3;

      key4 = I4;

      Y1 = 0;

      Y2 = 1;

      Y3 = 0;

      Y4 = 0;

      Y5 = !LED5;

      Y6 = !LED6;

      Y7 = !LED7;

      Y8 = !LED8;

      secondPanelKeyScan ++;

      break;        

       

   case 2:

      key5 = I1;

      key6 = I2;

      key7 = I3;

      key8 = I4;

      Y1 = 0;

      Y2 = 0;

      Y3 = 1;

      Y4 = 0;

      Y5 = !LED9;

      Y6 = !LED10;

      Y7 = !LED11;

      Y8 = !LED12;

      secondPanelKeyScan ++;

      break;        

       

   case 3:

      key9 = I1;

      key10 = I2;

      key11 = I3;

      key12 = I4;

      Y1 = 0;

      Y2 = 0;

      Y3 = 0;

      Y4 = 1;

      Y5 = !LED13;

      Y6 = !LED14;

      Y7 = !LED15;

      Y8 = !LED16;

      secondPanelKeyScan ++;

      break;

       

   case 4:

      key13 = I1;

      key14 = I2;

      key15 = I3;

      key16 = I4;

      Y1 = 1;

      Y2 = 0;

      Y3 = 0;

      Y4 = 0;

      Y5 = !LED1;

      Y6 = !LED2;

      Y7 = !LED3;

      Y8 = !LED4;  

      secondPanelKeyScan  = 1;

      break;

}

Please be aware: Because the output of the light signal is via PLC fast scanning. Cycle of PLC scanning is 4 ms, so when LED number increase, it will cause the lights on the interface to sparkle and ENU output pin power flow is 10 mA, if you want to improve the problem of not having enough power while the signal lights are sparkling and the problem of the driver not having enough power, must place another IC upon the electric circuit, such as 74HC273 that stable the status of each signal light, this way, it can improve the sparkling problem while PLC scanning is been conducted.