Modbus Server Interface Error Constants
mbErrOk = 0
No Error.
mbErrTimeOut = -2147220991 (&H80040201)
Time-out error when executing communication with a slave.
mbErrInvResp = -2147220990 (&H80040202)
The slave returned an invalid response.
mbErrCRC =-2147220989 (&H80040203)
Failed to check CRC of slave response.
mbErrWrPort =-2147220984 (&H80040208)
Error when writing to a com port.
mbErrRdPort = -2147220983 (&H80040209)
Error when reading from a com port.
mbErrNotInit = -2147220982 (&H8004020A)
The com port was not initialized.
mbErrExceptionCode = -2147188224 (&H80048200)
Errors &H80048201 to &H800482FF mean that the slave return an Exception code where
| &H80048201 | Slave returned exception code 1 |
| &H80048202 | Slave returned exception code 2 |
| &H80048203 | Slave returned exception code 3 |
| ... | ... |
These error are defined by modbus protocol.
mbErrBufferOverflow = -2147219992 (&H800405E8)
The buffer can not store a modbus message.
mbErrReadSockError = -2147219989 (&H800405EB)
mbErrWriteSockError = -2147219990 (&H800405EA)
Error while reading or writing using a socket api funtion.
mbErrSocketError = -2147219991 (&H800405E9)
Not specified socket error.
mbErrSockNotConnected = -2147219988 (&H800405EC)
Try to send a modbus message with disconnected socket.