Driver dialog option

Connection

Decide which type of connection is required. Either serial via a COM interface or TCP/IP

For serial mode, you can choose between Modbus RTU and Modbus ASCII. If you check the box ASCII, the driver will communicate via the Modbus ASCII protocol. If you uncheck the box, the driver will use Modbus RTU.

If you select a TCP/IP connection, you have to enter a configuration file. This file stores the TCP/IP settings.

Sequence for FLOAT objects

This option sets the Floatordering either to Standard Modbus or to 'HB Controler' Float Ordering.

Sequence for DWORD objects

This option defines the DWORD Ordering of the ModRTU driver. Either according to Intel format or Motorola format.

RTS Handshake

Some PLCs need the RTS handshake for a

correct communication.

Offset 1

The "Offset 1" affects the addressing of all variables.

It subtracts 1 from all addresses. (Coils, Register)

Max block size

Maximum block size of a data telegram.

!Attention (zenon < 5.50 SP6)! Block size must be < 64.

TCP configuration file

Here the name of the TCP configuration file has to be entered

Send delay

Delay for "send" requests (in milliseconds); affects the whole driver.

Skip non-existing data points

The driver reads data in a block. If there is no data between two address areas close to each other, the driver will still try to access these non-existing areas. This option will avoid that.

Reconnect timeout

Time in milliseconds to wait after a communication error before trying to reestablish the connection.

Communication timeout

Time in milliseconds to wait for a response from the Slave. If there is no response within this time, a communication error will be displayed.