Modbus exception - Illegal function

Modbus exception - Illegal data address

Modbus exception - Illegal data value

Modbus exception - Slave device failure

Modbus exception - Acknowledge

Modbus exception - Slave device busy

Modbus exception -Negative acknowledge

Modbus exception -Memory parity error

Reserved

Slave PLC data area cannot equal zero

Master PLC data area cannot equal zero

Coil (0x) not configured

Holding register (4x) not configured

Data length cannot equal zero

Pointer to message table cannot equal zero

Pointer to message table is outside the range of configured holding registers (4x)

Transmit message time-out (This error is generated when the UART cannot complete a transmission in 10 seconds or less. This error bypasses the retry counter and will activate the error output on the first error).

Undefined error

Modem returned ERROR

Modem returned NO CARRIER

Modem returned NO DIALTONE

Modem returned BUSY

Invalid LRC checksum from the slave PLC

Invalid CRC checksum from the slave PLC

Invalid Modbus function code

Modbus response message time-out

Modem reply time-out

XMIT could not gain access to PLC communications port #1 or port #2

XMIT could not enable PLC port receiver

XMIT could not set PLC UART

User issued an abort command

not used

not used

Undefined internal state

Broadcast mode not allowed with this Modbus function code

DCE did not assert CTS

Illegal configuration (data rate, data bits, parity, or stop bits)

Unexpected response received from Modbus slave

Illegal command word setting

Command word changed while active

Invalid character count

Invalid register block

ASCII input FIFO overflow error

Invalid number of start characters or termination characters

Reserved

Set to 1 when a DCE connected to the PLC requires hardware handshaking using RTS/CTS control. This bit may be used in conjunction with values contained in XMIT_CFG.XmStartDelay and XMIT_CFG.XmEndDelay. Start of transmission delay keeps RTS asserted for (X mS) before XMIT sends message out of PLC port. Likewise, end of transmission delay keeps RTS asserted for (X mS) after XMIT has finished sending a message out of the PLC port. Once the end of transmission delay expires XMIT de-assert RTS.

Set to 1 when the selected port should operate in RS485 mode. Otherwise it defaults to 0, which is RS232 mode.

Reserved

Set to 1 to remove and discard all characters from FIFO until the starting string is matched, then these starting characters and subsequent characters are written into the MSG_IN array until the terminator sequence is matched. The terminator string is also written into the MSG_IN array. Refer to Terminated ASCII Input Function for more details.

Set to 1 to remove the ASCII characters from FIFO for writing into the MSG_IN array. The Message pointer (XMIT_CFG.MessagePtr) is automatically set to the register address specified for the MSG_IN array. Refer to Simple ASCII Input Function for more details.

Set to 1 when you want to send ASCII messages out of the PLC. XMIT sends ASCII strings up to 1024 characters in length. You program the ASCII message into the MSG_OUT array. Two characters allowed per register. Only use Bit 7 OR Bit 8, do not try to use both. Refer to ASCII String Messaging for more details.

Set to 1 when you want to send Modbus messages out of the PLC. Modbus messages may be in either RTU or ASCII formats. When data bits=8, XMIT uses Modbus RTU format. When data bits=7, XMIT uses Modbus ASCII format. Only use Bit 7 OR Bit 8, do not try to use both.

Set to 1 to allow the XMIT block to take control over the selected port (1 or 2) from the PLC. The block begins to receive ASCII characters into an empty 512 byte circular FIFO. Refer to ASCII Receive FIFO for more details.

Set to 1 to allow special handling of ASCII back space character (BS, 8Hex). When using either Simple ASCII Input (Bit 6) or Terminated ASCII Input (Bit 5) each back space character is removed from FIFO and may or may NOT be stored into the MSG_IN array. Refer to Enable Back space for more details.

Set to 1 to allow full duplex hardware flow control using the RTS and CTS handshaking signals for ASCII massaging. The RTS/CTS operates in both the input and output modes. Refer to Enable RTS/CTS Flow Control for more details.

Set to 1 to allow full duplex software flow control using the ASCII Xon character (DC1, 11 Hex) and the ASCII Xoff character (DC3, 13 Hex). The Xon/Xoff operates in both the input and output modes. Refer to Enable Xon/Xoff Flow Control for more details.

Set to 1 when using a Hayes compatible dial-up modem and you wish to pulse dial a telephone number. You program the phone number into the MSG_IN array. The length of the message must be in XMIT_SET.MessageLen. Pulse dialed numbers are sent to the modem automatically preceded by ATDP and with carriage return <CR> and line feed <LF> appended. Since the dial message is an ASCII string, bit 7 must be ON prior to sending the number to be dialed.

Set to 1 when using a Hayes compatible dial-up modem and you want to hangup the modem. You must use ladder logic to turn this bit ON. Since the hangup message is an ASCII string, bit 7 must be ON prior to sending the message. Hang up messages are sent to the modem automatically preceded by +++AT and with carriage return <CR> and line feed <LF> appended. XMIT looks for a correct disconnect response from the modem before it turns ON the OP_SUC output signal, noting a successful completion.

Set to 1 when using a Hayes compatible dial-up modem and you wish to tone dial a telephone number. The the dial message must be placed in MSG_OUT array and the length of the message in XMIT_SET.MessageLen. Tone dial numbers are sent to the modem automatically preceded by ATDT and with carriage return <CR> and line feed <LF> appended. Since the dial message is an ASCII string, bit 7 must be ON prior to sending the number to be dialed.

Set to 1 when using a Hayes compatible dial-up modem and you want to initialize the modem. You program the initialization message into the MSG_OUT array and the length of the message XMIT_SET.MessageLen. All messages are sent to the modem automatically preceded by AT and with a carriage return <CR> and line feed <LF> appended. Since the initialization message is an ASCII string, bit 7 must be ON prior to sending the message.