Obsolete instruction
Use this instruction for a master to request data from a slave via the serial port (COM1 or COM2). Both master and slave must be configured in Modbus RTU master/slave mode via the system registers of the used port. The slave will automatically be enabled to handle Modbus commands 01, 02, 03 and 04, i.e. you do not need to configure the slave.
This instruction is allowed to be compiled because of the down-compatibility to lower versions but cannot be selected in the “Instructions” pane anymore. It will be replaced by: F145F146_MODBUS_MASTER