Chapter 3. CPU Configuration
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PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual
GFK-2222AD
Settings Parameters
Day Light
Savings Time
(DST)
RX3i CPE302/CPE305/CPE310/CPE330/CPE400 CPUs only.
Activates Day Light Savings
Time (DST) settings for the controller. Allows you to select appropriate local start and end
times 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 Map
This read-only tab displays the standard mapping assignments between Modbus address space and the
CPU address space. Ethernet modules and daughterboards in the PACSystems controller use Modbus-
to-PLC address mapping based on this map.
Modbus
Register
The 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.
