Differences

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--- mycnc:host_modbus_api [2019/07/29 15:11] – ivan
+++ mycnc:host_modbus_api [2019/08/01 15:26] (current) – ivan
@@ Line 15: / Line 15: @@
 | GVAR_XMODBUS_READ | 5756 | Writing to this register initiates Modbus Read operation. \\ Written value is a Modbus Server Register address (for Read). \\ Writing to this register will clear READY_READ register (5753). The READ_READY register value will be set to "1" when Read completed successfully. The READ_READY register will be set to "-1" if Read Error happens |
 | GVAR_XMODBUS_ADDR2READ | 5761 | Writing to this Register sets **Address of Global register** to put a result of **Modbus Read** operation |
-|GVAR_XMODBUS_READ_INPUT_BITS | 5763 | Read the input bits |
+|GVAR_XMODBUS_READ_INPUT_BITS | 5763 | Read the input bits. This will read the digital inputs/outputs in the  |
 | GVAR_XMODBUS_READ | 5764 | Read Modbus register (specify the particular register to read such as 5764,0) |
@@ Line 49: / Line 49: @@
 </code>
+**Another read/write example for WP9038ADAM with digital inputs/outputs and analog inputs**
+The analog inputs in this example are the holding registers, while the bits are the digital inputs and outputs which are dealt with through read/write commands. The code is using a 3 ms delay in order to loop the timer and to allow the Modbus device to receive/send all the necessary commands.
+<code c>main()
+{
+//Write
+  gvarset(5750,34);  //Set Modbus Server Address (device ID is set to be 34 in this case)
+  gvarset(5752,1);  //Indicator whether the operation is complete (0 for complete, 1 for not complete)
+  timer=0;
+  address=500; //the variable address is specified to the 500
+  gvarset(5761,address);  //Address to store read value
+count=0;
+  do
+  {
+  gvarset(5761,address);  //Address to store read value
+  gvarset(5751,count); //Set a value to write (selects which value will be written)
+  gvarset(5756,0); //Set a value to write (command to write the value that was set)
+  timer=3;do{timer--; }while(timer>0); //0.3 ms timer to loop
+// Read Bits
+  gvarset(5763,0);  //Read Modbus register #0
+  timer=3;do{timer--; }while(timer>0);
+// Read Holding Registers
+  gvarset(5761,address+1);  //Address to store read value will be variable 501
+  gvarset(5764,0);  //Read Modbus register #0
+  timer=3;do{timer--; }while(timer>0);
+// Read Holding Registers
+  gvarset(5761,address+2);  //Address to store read value will be variable 502
+  gvarset(5764,1);  //Read Modbus register #1
+  timer=3;do{timer--; }while(timer>0);
+// Read Holding Registers
+  gvarset(5761,address+3);  //Address to store read value will be variable 503
+  gvarset(5764,2);  //Read Modbus register #2
+  timer=3;do{timer--; }while(timer>0);
+// Read Holding Registers
+  gvarset(5761,address+4);  //Address to store read value will be variable 504
+  gvarset(5764,3);  //Read Modbus register #3
+  timer=3;do{timer--; }while(timer>0);
+count++;
+gvarset(507,count); //specifies the value for the 507 address
+   }while(1);
+ exit(99);
+};</code>
+The specifications for the Modbus devices that are currently sold through the myCNC shop can be found here:
+[[mycnc:modbus_devices|Modbus Devices available]]