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moacon:rtu_readinregs:index

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moacon:rtu_readinregs:index [2016/04/14 11:07] (current)
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 +====== 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]]
  
moacon/rtu_readinregs/index.txt · Last modified: 2016/04/14 11:07 (external edit)