Initial Setting - Hitachi EH-150 Series Applications Manual

Chapter 6 Communication Mode
6.4.3

Initial setting

EH-SIO becomes idle status (waiting to be initial setting by CPU module) after power ON.
In modbus slave mode, EH-SIO works while CPU module in stop mode. Communication mode is cleared by reset
button or rebooting the power.
« Note »
EH-SIO will not receive any operation command from CPU module or external device before initial setting.
 Parameters for initial setting
No. Parameter
1 Communication mode
2 Modbus mode
3
Node number
4
Waiting time
5
I/O mapping information
(Bit)
6
I/O mapping information
(Word)
 Parameter of TRNS 9 command for initial setting
Command number of initial setting in s+7 is H0000
Be sure to set parameters in the sending data area (s+9 to s+A) according to the next page, and be sure to set
dummy parameter in the receiving data area (s+B to s+D) although nothing is stored in the configured address area.
« Note »
Although "receiving data area" is not used in Modbus slave mode, configure a dummy address in it.
(data in this address has nothing to do with TRNS 9 command.)
Table 6.15 Parameter table for initial setting
Description
Set Modbus slave mode (H0011)
Select ASCII mode or RTU mode
Note : Only RTU mode is available in software ver. 1.0
Set node number (station number)
Waiting time from receiving a query to sending response.
Please specify, when you assign a coil (bit data) to I/O other than a default.
* The I/O mapping function has not been supported in software ver. 1.0.
Set H0000 in software ver. 1.0
Please specify, when you assign a register (word data) to I/O other than a default.
* The I/O mapping function has not been supported in software ver. 1.0.
Set H0000 in software ver. 1.0
Return code
s
System area (6 word)
H0000 (Command)
s+7
Command timeout time
s+8
s+9 Top I/O address of
sending data area
Top I/O address of
s+B
receiving data area
Size of receiving data area
s+D
Figure 6.52 s parameter format (Modbus slave / Initial setting)
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Set by user
Dummy parameter