Hitachi SJ/L-EN Ethernet Communications Module, Instruction Manual

Page: 17 / 36

Chapter 4
Page 17 of 36
Chapter 4 – Operation
Setting Up the Inverter for Ethernet Network Operation
Once the SJ/L-EN board has been properly configured and connected to a network as described in Chapter 3, it
is capable of reading data from and writing data to the inverter. However if it is desired to have either the RUN
command and/or the speed reference come from the Ethernet master, you must change two inverter parameters
as shown in the following table.
Defaults
Function
Code
Name Description
Run
Mode
Edit
Lo Hi
–FE
(EU)
–FU
(US)
–FR
(Jpn)
Setting for Ethernet Control
A001
Frequency
Source
Setting
Five options; select codes: *
00
Keypad potentiometer
01
Control terminal
02
Function F001 setting
03
RS485 serial command
10
Calculate function output
8 8
01
01 (or
00*)
02 02
A002
Run
command
source setting
Three options; select codes: *
01
Input terminal [FW] or [RV]
(assignable)
02
Run key on keypad, or
digital operator
03
RS485 serial command
8 8
01
01 (or
02)*
02 02
* Available options and factory defaults for L100/SJ100 series and L200/SJ200 series are different. Refer to pertinent inverter manual.
Supported MODBUS Functions
The SJ/L-EN is implemented with the MODBUS/TCP communication protocol. It supports the following
MODBUS functions:
•
READ MULTIPLE REGISTERS (03) – This function reads the contents of a contiguous block
of holding registers in the inverter.
•
READ INPUT REGISTERS (04) – This function reads from 1 to up to around 125 contiguous
input registers in the inverter.
•
WRITE SINGLE REGISTER (06) – This function will write to a single holding register in the
inverter.
•
WRITE MULTIPLE REGISTERS (16) – This function will write to a block of contiguous
registers in the inverter.
Additional MODBUS/TCP protocol details, including specifications, application information, implementation
guides, and other resources are available from the web site
www.modbus.org .