Library
Modbus_RTU Master
The library “Modb_l05.lib” contains the function blocks “MODBUS_EXTENDED_MASTER” and “MODBUS_EXTENDED_SLAVE”. The function blocks “MODBUSMASTER_RTU”, “MODBUSMASTER_RTU_EN”, and “MODBUS_EXTENDED_MASTER_RTU” are obsolete and for old projects only. New projects should prefer the master function block “MODBUS_EXTENDED_MASTER”. This function block contains all functionality of the obsolet FB's incl. Broadcast for write services and support of FC 23. This new FB allow you to use Modbus ASCII or Modbus RTU by an input parameter. Using this function block, the programmable controllers can act as a gateway to a Modbus (RTU / ASCII) network. Attention ! The function block “MODBUSSLAVE_RTU”, should not use in actual projects because this function block doesn't work for all WAGO-components. Instead of this function block please use the new function block "MODBUS_EXTENDED_SLAVE " that you can find at this library too. This block provides many Modbus (RTU / ASCII) services incl. Broadcast.