Ampcontrol DNET-IP2, Руководство пользователя

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DNET-IP2 USER MANUAL ISSUE 4
-3-
Byte# Description
8 Data 0 high
9 Data 0 low
… …
8+2n Data n high
9+2n Data n low
10+2n CRC_high
11+2n CRC_low
An IPSI-IP Module returns 59 data words .
See the translation table for a complete
description. The first data word returned is in
the following format:
First Data Word: <000000EE 0000AAAA>
binary
Where:
EE = 00-IPSI-IP is offline
EE = 01-IPSI-IP online IPA/IPB/IPC offline
EE = 11-IPSI-IP online IPA/IPB/IPC online
AAAA = IPSI-IP address (1…15)
LED Indication – Master Modbus RTU
In Master Modbus mode the IPSI-IP Module is
scanned on a regular basis and data is sent to
the Host system via the serial port.
IPSI-IP ‘Line’ LEDs - flash at a regular rate.
If the Host system does not reply to the
commands sent from the DNET-IP2 Protocol
Converter, there is a 1 second time out. If this
time out is occurring the scanning of the IPSI-
IP Modules will be slow. If the Host system
replies the scanning will be faster but not as
fast as Autoscan for the same number of IPSI-
IP Modules.
IPSI-IP ‘IPA’ LEDs - flashes each time a
block of data is being read from the Integrated
Protection Relay.
DNET-IP2 Tx LED - flash at the same rate as
the IPSI-IP Module.
DNET-IP2 Rx LED - flashes if the Host
system replies.
4.2 SLAVE MODBUS RTU
Slave Modbus RTU mode is selected by
placing switch 3 to the ‘ON’ position and
switch 4 to the ‘OFF’ position on the Dip
Switch.
Switches 1 and 2 of the Dip Switch set the
Baud Rate. The available rates are 1200, 2400,
4800 and 9600.
In Slave Modbus Mode the DNET-IP2
Protocol Converter waits for commands from
the Host Modbus Device.
When a correctly addressed read command is
received, the specified IPSI-IP Module is
scanned, the data is processed, and returned to
the Host Master Modbus Device using RTU
Modbus Protocol, Even parity, 8 bit data with
1 stop bit. If a command is not supported, or an
invalid address is used, the Host Device will
receive an exception response from the DNET-
IP2 Protocol Converter.
The Slave ID Address 1 to 15 is selected via
the Rotary Switch. If the Slave ID address is
zero then the Autoscan Mode is selected.
The IP2 Protocol Converter supports the
following commands:
•
CMD=3 Read Holding Registers
•
CMD=4 Read Input Registers
•
CMD=6 Write Holding Register
•
CMD=7 Read Exception Status
•
CMD=16 Write Multiple Holding
Registers
•
CMD=17 Read Slave ID
Valid addresses are as follows:
IPSI-IP- ID
Modbus
Address
Description
0000 – 000F Read/Write
1 0100 – 013F Read
2 0200 – 023F Read
3 0300 – 033F Read
4 0400 – 043F Read
5 0500 – 053F Read
6 0600 – 063F Read
7 0700 – 073F Read
8 0800 – 083F Read
9 0900 – 093F Read
10 0A00 – 0A3F Read
11 0B00 – 0B3F Read
12 0C00 – 0C3F Read
13 0D00 – 0D3F Read
14 0E00 – 0E3F Read
15 0F00 – 0F3F Read
Read commands must not exceed 64 words.
IPSI-IP Module returns 59 data words but any
size from 1 to 64 is valid. Data beyond word
59 will be random. See the translation table for
a complete description. The first data word
returned is in the following format: