Process Image Map; Modbus Interface Register/Bit Map - Hitachi HX-RIO3 Series User Manual

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5.3.3. Process Image Map

An expansion module may have 3 types of data as I/O data, configuration parameter and memory register.
The data exchange between Network Adapter and expansion modules is done via an I/O process image data
by RIO3 Series protocol. The following figure shows the data flow of process image between Network Adapter
and expansion modules.

5.3.4. MODBUS Interface Register/Bit Map

• Register Map
Start
Read/Write
Address
0x0000 ~ Read
0x0800 ~ Read/Write
0x1000 * Read
0x1020 * Read/Write
0x1100 * Read/Write
0x2000 * Read/Write
* The special register map must be accessed by read/write of each address (one address).
• Register Map
Start Address Read/Write
0x0000~ Read
0x1000~ Read/Write
Process input image registers (Real Input Register)
Process output image registers (Real Output Register)
Adapter Identification special registers.
Adapter Watchdog, other time special register.
Adapter Information special registers.
Expansion Slot Information special registers.
Process input image bits
All input registers area is addressable by bit address.
Size of input image bit is size of input image register * 16.
Process output image bits
All output registers area is addressable by bit address.
Size of output image bit is size of output image register *
16.
Description
Description
HX-RIO3 Series
Func. Code
3,4,23
3,16,23
3,4,23
3,4,6,16,23
3,4,6,16,23
3,4,6,16,23
Func. Code
2
1,5,15