Communication
Wireless Controller ARC600 provides a complete solution for
monitoring and controlling field devices. A secure
communication channel can be formed for remote serial
(RS-232/RS-485) or Ethernet field devices over a GPRS, 3G
or LTE connection. ARC600 makes it possible to have cost
effective communication networks over long distances at high data rates.
Several interfaces are available for field device connectivity:
digital inputs and outputs, analog inputs, serial and Ethernet
ports. Industrial protocols IEC-104. IEC-101 and Modbus
TCP are supported for the SCADA connectivity. The inputs
and outputs of ARC600 can be accessed and controlled with
the IEC-104 and IEC-101 protocols.
With the Wireless Controller ARC600 protocol conversion
feature, conventional IEC-101. Modbus RTU and Modbus
TCP devices can be connected in a reliable way to modern
TCP/IP based IEC-104 control systems.
Modbus to IEC-104 conversion
ARC600 provides support for generic Modbus RTU and
Modbus TCP devices such as ABB's RIO600. In addition,
support is also provided for the preselected Modbus
parameters for Fault Passage Indicators (FPI). Currently,
Horstmann Compass B and Kries IKI-50 are supported.
ARC600 polls the fault indicator devices, connected to the
serial port, using Modbus protocol and converts the values to
IEC 60870-5-104. Up to four fault indicators can be
connected to one device. IEC 60870-5-104 is used to
communicate towards a SCADA via the Arctic M2M Gateway
over the available customer chosen cellular data network.
IEC-101 to IEC-104 conversion
With ARC600. conventional IEC 60870-101 serial devices can
be attached to a modern TCP/IP based IEC 60870-5-104
control system. This is enabled by the protocol conversion
from IEC 60870-5-101 to IEC 60870-104. In this case,
ARC600 (IEC-101 master) uses local synchronous data
polling where it continuously sends requests and the IEC-101
device (IEC-101 slave) responds. In the direction of the
control room, the communication protocol is IEC-104 and
ARC600 can send events asynchronously as they arise while
SCADA performs only slow-period background scans.
Another advantage of the local protocol conversion is an
advanced data acknowledgement mechanism. IEC-104
allows multiple packets, and multiple events in a single
packet, to be acknowledged collectively and the packets can
be buffered up to the time of acknowledgement from SCADA.
Modbus RTU to Modbus conversion
Modbus field devices use usually serial mode (RTU or ASCII)
protocol while the SCADA communication uses TCP/IP based
Modbus TCP protocol. The Modbus user community has
defined the functionality for required protocol integration, that
is, how the Modbus RTU devices can talk to the Modbus TCP
SCADA system. This functionality is a protocol conversion
and it is implemented in ARC600. Many industrial devices like
PLCs and RTUs support RS-485 Modbus RTU mode. In
RS-485 mode, ARC600 can integrate unlimited number of
serial slaves to TCP/IP network (SCADA).
ARC600 has two application serial ports. Serial port 1 is
configurable to either console or data mode and it supports
only RS-232. while serial port 2 is configurable to multiple
serial modes (RS-232/RS-422/RS-485). Serial port
connectors are 9-pin D-sub (male) connectors.
wechat/whatsapp:
+86-181-4410-0983
Email: kongjiangauto@163.com
Copyright © 2009 - 2024 Cld , All Rights Reserved K-JIANG All rights reserved