Hitachi EH-150 Series - Register Configuration

Chapter 5 Control of EH-SIO
5 - 9
5.2.1 Register configuration
The function of the input / output register is shown below.
Table 5.1 Function of Input / Output register
Word No
Direction
Function
WX u s 0
CPUEH-SIO
(CPU Read)
Status register for port 1
The data about the state of a port 1 is set.
WX u s 1
CPUEH-SIO
(CPU Read)
Status register for port 2
The data about the state of a port 2 is set.
WX u s 2
CPUEH-SIO
(CPU Read)
System area for port 1
Before initial setting : Used by system
In free protocol mode : Number of receive packets
In dedicated procedure mode : Error code
In Simple data link mode : Used by system
Note : An error code is indicated when serious failure occurs in the system of
EH-SIO.
WX u s 3
CPUEH-SIO
(CPU Read)
System area for port 2
Before initial setting : Software version
In free protocol mode : Number of receive packets
In dedicated procedure mode : Error code
In Simple data link mode : Error code
WY u s 4
CPUEH-SIO
(CPU Write)
Control register for port 1
The data for CPU module controlling a port 1 is set.
Set by CPU module or user.
WY u s 5
CPUEH-SIO
(CPU Write)
Control register for port 2
The data for CPU module controlling a port 2 is set.
Set by CPU module or user.
WY u s 6
CPUEH-SIO
(CPU Write)
System area for port 1
Note: Please do not write. It is used by CPU module
WY u s 7
CPUEH-SIO
(CPU Write)
System area for port 2
Note: Please do not write. It is used by CPU module
u : Unit No. ( 0 to 4 )
s : Slot No. ( 0 to 7 )
0 ~ 7 : Word No. which EH-SIO occupies
*Dedicated procedure  Modbus slave mode, Hi-Protocol mode