ATI Technologies Metrinet Manuale utente
O & M Manual
Metrinet
Ethernet-IP Communication Manual
Home Office European Office
Analytical Technology, Inc. ATI (UK) Limited
6 Iron Bridge Drive Unit 1 & 2 Gatehead Business Park
Collegeville, PA 19426 Delph New Road, Delph
Phone: 800-959-0299 Saddleworth OL3 5DE
610-917-0991 Phone: +44 (0)1457-873-318
Fax: 610-917-0992 Fax: + 44 (0)1457-874-468
Email: sales@analyticaltechnology.com Email: sales@atiuk.com
Table of Contents
Ethernet/IP Option ........................................................................................................... 3
1.1 General ............................................................................................................. 3
1.2 Ethernet/IP Communication .............................................................................. 3
1.3 Ethernet/IP Transmission Details ...................................................................... 4
1.4 Cable Connection ............................................................................................. 4
1.5 Configuring MetriNet for Ethernet Option .......................................................... 6
1.6 Configuring fixed IP with BOOTP ...................................................................... 6
1.7 Loading EDS File ............................................................................................ 11
1.8 PLC Object Generic Settings .......................................................................... 11
1.9 PLC Object Settings Parameter Detail, and EDS Files ................................... 13
1.10 Optional Tool Examples: RSLinx Classic ........................................................ 27
Table of Figures
Figure 1 – Ethernet Cable Routing on MetriNet .............................................................. 5
Figure 2 - RJ45 Crimp Tool ............................................................................................. 5
Figure 3 – Force PC to Specific Network Subnet Prior to Running BOOTP .................... 7
Figure 4 – Launching BOOTP server .............................................................................. 7
Figure 5 – Setting IP/mask Assignment in BOOTP Server .............................................. 8
Figure 6 – Successful Detection of MAC ID and IP Address ........................................... 9
Figure 7 – PING and ARP Command Tests for IP Address Setting. ............................. 10
Figure 8 – Generic Module Input/Output Settings ......................................................... 12
Figure 9 – Connection/RPI Settings .............................................................................. 12
Figure 10 –Output Assembly Object Command Example with EIP_Tool ...................... 23
Figure 11 –Special Write-Codes for MetriNet Variable Changes .................................. 24
Figure 12 – TCP Object Query Example with EIP_Tool ................................................ 25
Figure 13 – Ethernet Link Object Query Example with EIP_Tool .................................. 26
Figure 14 – RSLinx Classic ........................................................................................... 28
Figure 15 – Adding Ethernet/IP Driver........................................................................... 28
Figure 16 – New Node Added Successfully to Driver Application. ................................ 29
Figure 17 – Creating DDE/OPC Topic ........................................................................... 29
Figure 18 – Processor Selection for PC-based OPC Topic ........................................... 30
Figure 19 – RSLinx OPC Test Client ............................................................................. 30
Figure 20 – OPC Running On Active Node Data .......................................................... 31
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Ethernet/IP Option
1.1 General
MetriNet Monitors are available with three digital communication options: Cellular,
Modbus-RTU, Modbus-TCP/IP, and Ethernet/IP. This manual applies only to
instruments supplied with the Ethernet/IP communication option. It is critical to
note that Ethernet/IP devices only communicate with other systems running the
“Industrial Protocol” of Ethernet. You cannot plug a MetriNet into your office
Ethernet and expect to have the instrument talk to your desktop computer.
The discussion of standard Ethernet and Ethernet/IP is vast, and well beyond the
ability to discuss here in great detail. The documentation for this option assumes
working network knowledge by the user.
1.2 Ethernet/IP Communication
Ethernet/IP was first introduced in 2001, and is a highly developed and complete
protocol for an industrial Ethernet network solution. Intended for automation
applications, EtherNet/IP is a member of a family of networks that implement the
Common Industrial Protocol (CIP) at its upper layers of the standard ISO/OSI 7-
layer model. CIP defines the object structure, specifies the message transfer,
provides users with a unified communication architecture, and encompasses a
comprehensive suite of services for a variety of manufacturing automation
applications which include data, control, safety, and configuration.
In the CIP Protocol, every network device represents itself as a series of objects.
Each object is simply a grouping of the related data values in a device. The identity
object contains related identity data values called attributes. Attributes for the
identity object include the vendor ID, date of manufacture, device serial number
and other identity data.
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1.3 Ethernet/IP Transmission Details
It should be understood that Ethernet/IP is simply an application layer protocol that
is transferred over an Ethernet hardware link. The word "Ethernet" simply refers
to the common physical cable, perhaps running to an office PC.
In the OSI model, “Ethernet” is the lower part of the model, the physical transfer
method or the hardware. It says nothing about the way information is transferred,
which is specified near the top of the OSI model. In the common office network,
many different standard communication protocols are operating during normal
office use, like IP, TCP, etc. None of these are designed to handle the CIP
industrial format, so that interface must be handled by a specific program that
recognizes the format. Because of this, an Ethernet/IP device cannot be directly
connected to your office network for transferring information.
The data for the protocol is constructed into a specific structure inside a standard
TCP/IP Packet. A user application program simply decodes the structure inside
the received TCP or UDP packet. The data structure consists of a grouping of
data values called Attributes inside other sets of containment data called Objects.
There are Ethernet/IP required Objects and application Objects. Required objects
are typically - Identity, TCP, and Router. Application objects consist of some
defined data types, like a Motor Object, and some user specific data types.
1.4 Cable Connection
The cable used for Ethernet/IP communication should meet the CAT5 standard
defined by the Electronic Industries Association and Telecommunications Industry
Association. It is readily available in lengths up to 100 ft. (30 m) with plugs on each
end.
To install an Ethernet cable in the MetriNet, pass the unterminated cable through
the cable gland nearest the location of the RJ45 connector on the Ethernet/IP
option board. Provide a slight service loop amount of slack so that the terminated
cable will not be pulling directly on the RJ45 connector once installed. Termination
of Cat5/5e/6 cables is very easy and can be completed quickly with the commonly
available RJ45 crimp tool.
Note that there a reconnection LEDs present on the face of the RJ45 connector,
which can be used to verify activity on the interface. Rather than detail their
specific use, it is sufficient to just very flashing on these LEDS when the unit is
powered up or actively communicating with the network client.
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Figure 1 – Ethernet Cable Routing on MetriNet
Figure 2 - RJ45 Crimp Tool
While professional results are optimized with the use of the termination tool and
custom cable lengths, patch cord style connection can be completed in some
cases by passing the finished RJ45 connectors through the enclosure cable gland.
The connector will fit through the plastic part of the cable gland, and the rubber
grommet can be slit (some RJ45s may be too big for this.) Once the connector is
inside the enclosure, simply plug it into the jack provided on the Ethernet/IP
communication board. Be sure to adjust the rubber insert in the cable gland so
that the slit is on the bottom and then tighten the gland to seal around the wire.
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1.5 Configuring MetriNet for Ethernet Option
Once the proper power is applied to the MetriNet monitor, select “Ethr” in the
^Host Comms listing of the OPTIONS menu to enable Ethernet/IP functionality.
1.6 Configuring fixed IP with BOOTP
The next step in the use of the MetriNet is to sort out how an IP network address
will be assigned to the instrument. The MetriNet acquires a dynamic network IP
address from the network client/master through the BOOTP service, which is
enabled by default for ODVA EIP-CIP conformance.
BOOTP is a very simple software server application that waits for a specific MAC
address to appear on the network, and then assigns it a pre-determined IP address
that has been set-up by the user. In the most actual applications, BOOTP runs
right on the PLC alongside tools like Rockwell’s Logix/Studio 5000. For manual
fixed settings, this same BOOTP server tool can be easily run on a PC. The current
Rockwell version of this tool (recommended) is –
“BootP-DHCP Ethernet/IP Commissioning Tool Version 3.02.00”
This tool is available from the Rockwell Automation website for free. For optimum
security, only download this tool directly from Rockwell Automation.
While this tool is normally used for dynamic assignment, the MetriNet will
remember the last successful assignment made by BOOTP, and it will retain that
assignment after cycling instrument power. Therefore, the tool can be used to lock
in a fixed IP address assignment, and then the BOOTP service will not actually be
required after that first assignment.
In order to use BOOTP properly on a PC, some careful NIC adjustment settings
must be made to the PC Ethernet port prior to running the BOOTP service. The
PC can only reach IP addresses at the predetermined IP/subnet level, so we must
force the PC to a subnet that can reach the existing MetriNet.
1) Turn off MetriNet. Connect MetriNet to laptop with direct cable. Set laptop
NIC port on a locked IP and subnet to stop DHCP service. In IPV4
properties on your PC’s Ethernet connection port, select "Use the following
IP Address" and set the PC to fixed IP of -
IP Address = 192.168.0.10
Subnet Mask = 255.255.255.0
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Figure 3 – Force PC to Specific Network Subnet Prior to Running BOOTP
2) Once this IP/subnet is set, click OK to save and then close it all out. Turn
PC off then back on to place it on the new IP address set in step 1. The PC
will now be able to access any network device on 192.168.0.X, as the
subnet mask 255.255.255 locks in the first three variables. The default
value for the MetriNet is 192.168.0.254, so it can now be reached by the
PC.
3) Find the Rockwell BOOTP PC application and launch it. Select your
Ethernet Adapter as the network interface.
Figure 4 – Launching BOOTP server
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4) On next screen, you must create an assignment relationship to match a
known MAC ID with a desired IP address. The MAC ID for your MetriNet is
written on a label inside the enclosure. For this example, we will use the
MAC ID - 00:80:A3:9B:BE:B6 and assign it an IP of 192.168.0.30. Hit OK
after this information is filled in, and you will see this entry appear in the
bottom half of the window under “Entered Relations.”
Once the MAC assignment has been entered, it is ready for a BOOTP IP
request to come in for assignment. Requests for assignment will appear in
the upper window as they come in.
Figure 5 – Setting IP/mask Assignment in BOOTP Server
5) Now, plug the cable from MetriNet into the PC Ethernet port, turn on power
to the MetriNet, and wait for BOOTP to detect the request from the MetriNet
for an IP address.
The upper “Discovery History Window” will show new IP requests coming
in on the Ethernet port, and when the specific MAC ID in our relation shows
up, the IP will be automatically assigned per our relation entry and sent to
the MetriNet. Note that you may see requests from other devices as they
come in, but only the specific MAC ID from the assignment will be
acknowledged.
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Figure 6 – Successful Detection of MAC ID and IP Address
Assignment in BOOTP Server
Once the assignment has been made and the IP has been sent to the
MetriNet, disconnect power to the MetriNet and that IP will be stored in the
instrument. The MetriNet stores the very last successful IP address
assignment. Then close out all BOOTP server windows.
6) Now, to check that the IP address has been properly saved, apply power to
MetriNet again and wait one 1 minute before connecting it to the PC port.
Do not launch BOOTP server this time, as you don’t need it. During the 1
minute wait, MetriNet will search for a BOOTP server on power up and won’t
find the service because it is not used here now, and the MetriNet is also
not connected to the PC. It will then revert to the stored default – the last
successful BOOTP assignment. Connect cable from MetriNet to the PC
after that one minute. You can now check the IP connection to the MetriNet
at that address by entering a ping command at the Windows OS command
prompt, for example “>ping 192.168.0.30.” You should see a response as
shown below. In addition, you can try an “>arp -a” command to show all
current connections and associated MAC addresses. You should see the
new IP address of 192.168.0.30 showing up.
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Figure 7 – PING and ARP Command Tests for IP Address Setting.
Note that the “arp -a” listing still shows this IP as a “dynamic” assignment,
as this is the fall-back IP that has been stored in the MetriNet. On power
up, the MetriNet will still try and find a BOOTP server for 30 seconds, and
then default to this stored value as the fallback. If you do not see your new
connection, two troubleshooting notes –
1-You must always be careful to place the new IP address on the proper
subnet level so the PC can still reach it with the settings made in step 1. If
the PC is on 192.168.0.X, then any assigned IP must be on the X level –
and don’t place the MetriNet on the same IP as the PC. During BOOTP
server assignment, if you place the MetriNet on a vastly different IP like
10.20.120.100, you must repeat step 1 before step 6 above to place the PC
at something like 10.20.120.10. This can get tricky, as you can make
assignments anywhere, but then the PC must be re-established on that new
net to find the new assignment.
2-Remember to wait a minute before the ping test if you verify a connection.
The MetriNet runs BOOTP by default, so it will be searching for that server
for about 30 seconds on power up, and then will default to the stored IP.
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