Nidec LEROY-SOMER Powerdrive FX, Руководство по вводу в эксплуатацию

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OPERATION WITH MODBUS RTU
Commissioning manual Powerdrive MD2/FX
4617 en - 2017.09 / e
6 - OPERATION WITH MODBUS RTU
6.1 - Serial link
The POWERDRIVE incorporates as standard a non-isolated
serial link port accessible with a connector.
For users who wish to keep the parameter-setting interface
permanently connected, it is then necessary to add the MDX-
MODBUS option with an isolated 2 or 4-wire serial link port. For
further details, please refer to the MDX-MODBUS manual ref.
4580.
6.1.1 - Location and connection
P2 is a standard RS485/RS422 terminal block.
Terminals Description
1 0V
2 Rx\, Tx\’
3 Rx, Tx
4 24V
6.1.2 - Protocols
The drive handles the following protocols:
- MODBUS RTU
- LS Net
The drive automatically recognises the protocol used, and this
can be read in 11.24 «Serial mode».
6.1.3 - Parameter setting
Depending on the application, the following parameters need
to be modified.
11.23 : Serial address
11.25 : Baud rate
11.27 : Parity type, number of stop bits
For more information on these parameters, refer to menu 11,
section 5.12.2.
6.1.4 - Networking
The POWERDRIVE serial port allows the drive to communicate
with a 2-wire RS485 network.
The network should therefore be connected in a «daisy-chain»
(not a star).
6.2 - Parameter setting using the PC
With the MDX-SOFT parameter-setting software, setting up
the POWERDRIVE from a PC is very user-friendly.
For further details, refer to section 3.
6.3 - Control word and status word
POWERDRIVE run commands can be managed using a
single parameter 06.42 , called the «control word».
This is because the value of 06.42 corresponds to a word in
which each bit is associated with a command. The command is
enabled when the bit is at 1, and disabled when the bit is at 0.
To enable commands using the control word, set 06.43 = 1
(run commands via the terminals are no longer active), when
the drive is disabled.
Parameter 10.40 , called the status word, is used to group
together information about the drive. The value of 10.40
corresponds to a 15-bit word, and each bit is associated with a
drive status parameter.
6.4 - MODBUS RTU
6.4.1 - General
The MODBUS RTU protocol is a master-slave type protocol (a
single master per network).
Description
Characteristics
Normal physical layer for
multi-drop operation
2-wire RS485
Bit stream
Standard UART asynchronous
symbols with Non-Return to
Zero (NRZ)
Symbol
Each symbol consists of:
1 start bit
8 data bits (least significant bit
transmitted first)
1 or 2 stop bits according to
11.27
Baud rate
1200, 2400, 4800, 9600,
19200, 38400, 57600, 115200
bauds
Px1 P1 P2 Px2 Px3
Connector for
MODBUS RTU