ModbusTCP Server (Slave)

Auswahl Hilfen previous top next english version

Error handlingET/MT-3x6, ET/MT-2x8 series error messagesError Messages of Individual DriversModbusTCP Server (Slave)

 

The part supplementary data of error messages of Modbus TCP slave driver may contain following data:

 

data_address is the start address of data accessed by the request in the Modbus address notation
data_size is the size of data accessed by the request  expressed like a number of data elements in decimal format.
direction (from the point of view of the terminal) is:

- "rcv" for transmitting data from the master to the slave

- "snd" for transmitting data from the slave to the master

error_code is the decimal error code value returned by an RTIP API function
function_code is the function code of the Modbus telegram in hexadecimal format

 

The Modbus Modicon and Modbus general address notations are like this:

 

- <address_type> <address>

 

address_type may be one of:

- 0,O,M

- 1,I

- 3

- 4,R

address is an unsigned number in decimal format

 

The Modbus ABB address notation is like this:

 

- <address_type>  <group>,<channel>

 

address_type may be one of: E, A, M, EW, AW, MW, KW, MD, KD
group is an unsigned number in decimal format
channel is an unsigned number in decimal format

 

 

<< return