3.1. Overview Serial Devices to Ethernet Gateway

3.1. Overview Serial Devices to Ethernet Gateway
Overview
3
Programmable Device Servers (Serial-to-Ethernet)
3.1. Overview
Serial Devices to Ethernet Gateway
E
T
d
w
p
◆
U
e
t
s
P
r
m
◆
I
s
p
e
n
The ICP DAS Programmable Device Server is designed to bring network connectivity to your serial devices.
The programmable features allow developers to quickly build custom applications that turn “dull” serial
devices into “intelligent” devices right away without modifying their hardware or software configuration.
1
Overview
With extensive experience accumulated over many years, a great
number of serial devices such as PLCs, bar code readers, RFID readers,
meters and motion controllers, etc., have been widely used in various
applications. As the advances in communication technologies in recent
years, continue to drive optimization of data accessibility and remote
operation ability, a wide variety of industries have begun to feel the
urge to upgrade their latency serial communications to Ethernet
network connections. The ICP DAS PDS series of products are your best
choice for implementing this scenario in a robust, reliable and costeffective way.
NS-208
Control Center
Ethernet
PDS-700
PDS-700
PDS-700
PDS-700
CF
Overview
The VxComm Driver creates
virtual COM port(s) on Windows
NT 4.0/2000/XP/2003/Vista32
systems and maps them to the
remote serial port(s) of the
PDS/DS series. The user's serial
client programs need to only be
changed to the virtual COM port
access the serial devices that
are allocated on the Internet or
Ethernet
network
via
the
PDS/DS series.
Remote Kiosk Information Station Management
3-1-1
ICP DAS CO., LTD
Professional Provider of High Quality Industrial Computer Products and Data Acquisition Systems
D
I
c
c
Easy Serial Device Networking with “transparency”
The most intuitive and easiest way to remotely control serial
devices is to access those devices transparently via a network
with no software modification required. The ICP DAS PDS
product line offers two transparent applications:
NS-208
PDS-700
COM3
COM4
...
Ethernet
PDS-700
COM13
COM14
...
◆ Socket Connections:
Using a TCP/IP socket connection, client programs can
exchange information with specific PDS/DS serial ports and
talk to serial devices directly. For example, simply create a
socket connection to the TCP/IP port 10001 (default) of the
PDS/DS device and you can then access Port1 of the PDS/DS
remotely. This is an OS-independent method and works well on
most OS (operating systems) that provide socket functions.
PDS-700
COM23
COM24
...
◆ Virtual COM Ports:
ICP DAS developed a specific function called "Virtual COM" that
simulates PDS serial ports as fixed PC COM ports. Virtual COM
ports appear to the system and applications as real ports. Once
established, users can immediately enjoy the convenience that
networking provides.
3
Programmable Device Servers (Serial-to-Ethernet)
.
l
Industrial Communication Products
DynaCOM Technology
ICP DAS Virtual COM also supports an exclusive function - Dynamic Virtual COM Mapping (DynaCOM); if the system
can only access limited or fixed numbers of COM Ports, specific PDS serial ports can be dynamically assigned to the
corresponding COM port numbers.
PDS-700
Meter
I-7000
RS-232
Virtual COM3, COM4
PDS-700
I-7000
Meter
Overview
Virtual COM3, COM4
1
RS-485
I-7000
I-7000
RS-485
RS-485
Virtual COM3, COM4
Meter
PDS-700
Virtual COM3, COM4
RS-232
PDS-700
I-7000
Meter
RS-485
I-7000
I-7000
CF
I-7000
Overview
RS-485
RS-485
DynaCOM use same virtual COM ports mapping to several PDS dynamically
Website: http://www.icpdas.com
E-mail: service@icpdas.com
3-1-2
Overview
1
Programmable Device Servers (Serial-to-Ethernet)
1
Programmable Enhanced “Device Servers”
V
The programmable features of the PDS series of products makes it possible to effectively implement
exclusive protocols and exclusive communication mechanisms for complex PDS-based applications. This
provides the following advantages:
I
a
t
f
m
u
◆ Effective network transmission:
Place your customized software on the PDS to directly perform
processes locally. The effective data and information can be
periodically sent back to the PC based on a schedule that can
be planned in advance and the devices will work independently
on-site, even when not connected to a network. Therefore, the
design of system can be much more flexible. This also reduces
the need to rely on the network, which is an inevitable factor
for conventional DS (Device Server) as it has to keep on
“talking” to the PC via the network to ensure the status
maintains transparency.
Domain Knowledge
Idea
Question
PDS-700
System Integrator
Value-Added Solutions
◆ Previous development efforts can be duplicated:
Along with serial devices, you can place your customized or value-added software on the PDS to implement an
intelligent Ethernet controller. This controller can then be used in applications for future projects, dramatically reducing
programming requirements. In addition, your value-added software is embedded in the PDS, so if a computer system
undergoes hardware replacement or upgrade, incompatibility issues don’t need to be considered, which therefore
reduces system maintenance work.
Programmable Protocol Converter
Overview
RFID Reader
PLC
Ethernet
PDS-700
ol
Uni
fied
toc
Pro
Meter
NS-208
Unif
CF
ied
Prot
ocol
Overview
3-1-3
Machine
PDS-700
ICP DAS CO., LTD
Professional Provider of High Quality Industrial Computer Products and Data Acquisition Systems
Industrial Communication Products
Virtual I/O Highly Integrates On-Site Messages
3
"Virtual I/O" is an extension of
"Virtual COM" technology that
simulates the PDS's digital
I/Os control as a virtual COM
port (Port I/O) application on
the PC. You are now able to
access the PDS's digital I/Os
using the DCON protocol
through the virtual COM port.
In addition, the DCON utility
and EZ Data Logger also
support control of the PDS's
digital I/Os through the use of
"Virtual I/O" technology, so
you can monitor PDS's digital
I/Os and complete the I/Os
application in a convenient
way.
Serial Devices
Fitness
Power Meter
PLCs
RFID Reaser
Meter
Barcode Reader
PDS-700
NS-208
Ethernet
n
g
m
e
Digital I/O
Programmable Device Servers (Serial-to-Ethernet)
I/O acquisition is very important when performing on-site integration, so,
along with DCON utility provided by ICP DAS, the RS-485 of PDS is able
to be connected to I-7000 series products to offer abundant I/O modules
for various purposes. For easier on-site integration operations, some PDS
models also provide Digital I/O, which is also supported by the DCON
utility, the EZ Data Logger or other DCON client programs.
Data Center
DCON utility
1
Overview
Programmable Data Monitor, Filter and I/O Controls
Local Alarm
Data Center
D/O
Engineer Responses
PDS-700
NS-208
D/I
CF
Ethernet
ria
l
PLC
Raw Data:
Debug Messages
System Status
External Device Status
◆ Waring & Event Messages
◆ ...
Overview
Se
◆
Information:
System Status
◆ Warning Messages
◆ Remove Duplicated Messages
◆
◆
Website: http://www.icpdas.com
◆
E-mail: service@icpdas.com
3-1-4
Overview
3
Programmable Device Servers (Serial-to-Ethernet)
ESD Protection and Frame Ground
D
The PDS series offers TVS diode ESD protection
technology with a frame ground design that
protects your system from being damaged by high
potential voltages.
M
I
d
s
a
Z in
Transient
Current
TVS
Diode
ESD
(Eelectro-Static Discharge)
Frame Ground
Provides a path for the ESD
to the Earth Ground
PROTECTED
CIRCUIT
C
Earth Ground
Frame Ground
Under normal operating conditions, the TVS diode presents high impedance (appears as an open circuit)
to the protected component. If the voltage exceeds the limitation, the TVS diode avalanches, providing a
low impedance path for the transient current. As a result, the transient current is diverted away from the
protected components and shunted through the TVS diode. The device returns to a high impedance state
after the transient threat has passed.
Self-Tuner Inside
1
A
t
h
r
t
Overview
T
n
n
T
Without the presence of Self-Tuner, users need to enable the RS-485 transmitter before transmitting, and
disable the transmitter after the transmission is complete. The time required to enable and disable the
transmitter (direction control) is the major source of many communication issues, and it is very difficult to
debug. The built-in Self-Tuner in the PDS effectively removes this direction control issue and also simplifies
the software/firmware programming required for communication applications.
I
Master IP and Filter IP
A
M
M
a
◆ Change Setting
◆ Access Ports
Overview
The PDS can use a master IP setting that allows a
client to configure the PDS and COM ports. This
prevents the configuration of the PDS and COM
ports from being changed by other clients.
Master IP
NS-208
◆ Access Ports
IP Filter
The IP filter setting limits which client PCs are
able to access the PDS module via specific IP
addresses. Connections from other clients will be
rejected by the PDS.
Connections are rejected by PDS-700
ICP DAS CO., LTD
P
s
h
W
y
w
b
The PDS also contains a built-in web server that
enables users to conveniently configure the PDS.
A web browser, like IE or Firefox, can be used to
connect to the PDS to modify the configuration,
such as: IP address, subnet mask, gateway, DHCP
client, UDP search, Web Server, Telnet Server,
TCP ACK delay, Watchdog timeout, Master IP,
Filter IP, COM port baud rate, data format and
transfer mode, etc.
3-1-5
U
The PDS series is equipped with a “Self-Tuner” chip that automatically controls the sending/receiving
direction of the RS-485 ports.
Easy Web Configuration
CF
M
I
d
a
b
in
b
Professional Provider of High Quality Industrial Computer Products and Data Acquisition Systems
PDS-700
M
m
s
T
M
t
M1: Slave Mode (Single-echo)
In slave mode, the PDS only sends data from a serial
device to the client that requires the service. If there
are no requirements from the client, then data will not
be sent to the client. The PDS services each client
individually when sharing data from the serial device,
but the clients do not have a copy of the same data.
Total 32
TCP Sockets
Client A
Client B
Client C
PDS-700
NS-208
Single-Board
Computer (SBC)
Ethernet
VCOM12
VCOM13
VCOM15
UDP Broadcast
DVB Carrier
S75 DVB-S
Satellite Data Receiver
Device
VCOM14
Device
The UDP function can be disabled on the PDS if the
network suffers a flood attack or receives a large
numbers of UDP packets from the network devices.
This protects the PDS from UDP flood attacks.
PDS-700
Ethernet
UDP Flood Attack Protection
A UDP flood attack is a denial-of-service (DoS) attack
that sends a large number of UDP packets to a remote
host. As a result, the affected system will be forced into
replying to many packets, eventually causing the host
to be unreachable by other clients.
3
NS-208
Device
(Digital Video Broadcast)
Industrial PoE Solution
Power over Ethernet (PoE) allows power and data to be carried over a single Ethernet cable, so a device can operate
solely from the power it receives through the data cable. This innovation allows greater flexibility in office design,
higher efficiency in systems design, and faster turnaround time in set-up and implementation.
1
Overview
When using PoE devices such as the PPDS-700-MTCP, PPDS-700-IP67 and PET-7000 (Ethernet I/O module with PoE),
you can select the ICP DAS "PoE" switch — "NS-205PSE"- as the power source. The NS-205PSE automatically detects
whether the connected devices are PoE devices or not. This mechanism ensures that the NS-205PSE will work with
both PoE and non-PoE devices simultaneously.
As a power source for PoE devices, the NS-205PSE requires a power input ranging from +46 VDC ~ +55 VDC.
Modbus/TCP to Modbus/RTU Gateway
Modbus has become a de facto standard communications protocol in the industry, and is now the most commonly
available means of connecting industrial electronic devices.
Modbus allows for communication between many devices connected to the same network, for example a system that
measures temperature and humidity and communicates the results to a computer. Modbus is often used to connect a
supervisory computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems.
The default firmware of the μPAC-7186EX(D)-MTCP and PPDS-700-MTCP devices allows them to become a single
Modbus/TCP to multiple Modbus/RTU converter. You can simply use the Modbus Utility to configure the device and
then set a connection between the SCADA/HMI software and the μPAC-7186EX(D)-MTCP and PPDS-700-MTCP.
Website: http://www.icpdas.com
E-mail: service@icpdas.com
CF
Overview
0
M0: Transparent Mode (Multi-echo)
In transparent mode, the PDS sends data from a serial
device to each client that is connected to the same
serial port of the PDS. Thus, each connected client has
a copy of the same data from the serial device.
Device
d
e
o
s
Serial Device
Multi-client sharing
a data source
Applications
g
Data Sharing with Multiple Clients
Programmable Device Servers (Serial-to-Ethernet)
)
a
e
e
Industrial Communication Products
3-1-6
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising