Hitachi L200 Manual Do Utilizador
Introduction
Appendix B
B–2
Introduction
L200 Series inverters have built-in RS-485 serial communications, featuring the
ModBus RTU protocol. The inverters can connect directly to existing factory networks
or work with new networked applications, without any extra interface equipment. The
specifications for L200 serial communications are in the following table.
ModBus RTU protocol. The inverters can connect directly to existing factory networks
or work with new networked applications, without any extra interface equipment. The
specifications for L200 serial communications are in the following table.
The network diagram below shows a series of inverters communicating with a host
computer. each inverter must have a unique address, from 1 to 32, on the network. In a
typical application, a host computer or controller is the master and each of the inverter(s)
or other devices is a slave.
computer. each inverter must have a unique address, from 1 to 32, on the network. In a
typical application, a host computer or controller is the master and each of the inverter(s)
or other devices is a slave.
Item
Specifications
User-selectable
Transmission speed
4800 / 9600 / 19200 bps
✔
Communication mode
Asynchronous
✘
Character code
Binary
✘
LSB placement
Transmits LSB first
✘
Electrical interface
RS-485 differential transceiver
✘
Data bits
8-bit (ModBus RTU mode)
(ASCII mode not
available)
Parity
None / even / odd
✔
Stop bits
1 or 2 bits
✔
Startup convention
One-way start from host device
✘
Wait time for response
0 to 1000 msec.
✔
Connections
Station address numbers from 1 to 32
✔
Connector
RJ45 modular jack
—
Error check
Overrun, Fleming block check code,
CRC-16, or horizontal parity
CRC-16, or horizontal parity
—
L200
1
2
RUN
STOP
RESET
FUNC.
STR
HITACHI
POWER
ALARM
RUN
A
Hz
PRG
5 0.0
L200
1
2
RUN
STOP
RESET
FUNC.
STR
HITACHI
POWER
ALARM
RUN
A
Hz
PRG
5 0.0
L200
1
2
RUN
STOP
RESET
FUNC.
STR
HITACHI
POWER
ALARM
RUN
A
Hz
PRG
5 0.0
1
ModBus Network
2
32
Host computer