Differences

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--- moacon:rtu_readinregs:index [2016/04/14 11:07]
+++ moacon:rtu_readinregs:index [2016/04/14 11:07] (current)
@@ Line 1: / Line 1: @@
+====== RTU_readInRegs ======
+''short RTU_readInRegs(u8 comCh, u8 slaveAdr, u8* result, u16 targetAdr, u8 numOfRegs)''
+|comCh: The RS-232 channel to use |
+|slaveAdr: The Modbus slave address of the device to read from |
+|result: Buffer to store coil (bit) data to |
+|targetAdr: The address of the data to read |
+|numOfRegss: Number of registers (words) to read |
+|returns the status of this function call (-1=Success, 0=Timeout, 1=Data Error) |
+Performs the same operation as RTU_readRegs but uses Modbus function code 4. The MOACON does not
+distinguish between function codes 3 and 4, but some PLCs do. This function is provided so the MOACON
+can interface properly with those PLCs that distinguish between function codes 3 and 4.
+<code c>
+u8 registerBuffer[100];
+res = RTU_readInRegs(0,1,registerBuffer,0,2);
+</code>
+[[moacon:about_modbus:index|About MODBUS]]
+[[MOACON:index#System_Library:|go MOACON home]]