Chapter 3. CPU Configuration114 PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual GFK-2222ADSettings ParametersDay LightSavings Time(DST)RX3i CPE302/CPE305/CPE310/CPE330/CPE400 CPUs only. Activates Day Light SavingsTime (DST) settings for the controller. Allows you to select appropriate local start and endtimes for Day Light Savings Time.Choices:Disabled: Day Light Savings Time settings are not active.Enabled: Day Light Savings Time settings are active and configurable.Default: Disabled.3.2.2 Modbus TCP Address MapThis read-only tab displays the standard mapping assignments between Modbus address space and theCPU address space. Ethernet modules and daughterboards in the PACSystems controller use Modbus-to-PLC address mapping based on this map.ModbusRegisterThe Modbus protocol uses five reference table designations:0xxxx Coil Table. Mapped to the %Q table in the CPU.1xxxx Input Discrete Table. Mapped to the %I table in the CPU.3xxxx Input Register Table. Mapped to the %AI register table in the CPU.4xxxx Holding Register Table. Mapped to the %R table in the CPU.6xxxx File Access Table. Mapped to the %W table in the CPU.Start Address Lists the beginning address of the mapped region.End Address Lists the ending address of the mapped region. For word memory types (%AI, %R and %W)the highest address available is configured on the Memory tab.PLC Memory Lists the memory type of the mapped region.Length Displays the length of the mapped region.
