Contemporary Controls Metasys JC-MER-CXB User manual

Metasys Ethernet Router
User Manual
#TD060100-0MA
Version 1.1
JC-MER-CXB

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Trademarks
Contemporary Controls, ARC Control, ARC DETECT and
EXTEND-A-BUS are trademarks or registered trademarks of
Contemporary Control Systems, Inc. ARCNET is a registered
trademark of Datapoint Corporation. Other product names may be
trademarks or registered trademarks of their respective companies.
Copyright
© Copyright 1998-2006by Contemporary Control Systems, Inc.
All rights reserved. Metasys®is a registered trademark of Johnson
Controls, Inc. © 2007Johnson Controls, Inc. No part of this
publication may be reproduced, transmitted, transcribed, stored in
a retrieval system, or translated into any language or computer
language, in any form or by any means, electronic, mechanical,
magnetic, optical, chemical, manual, or otherwise, without the prior
written permission of:
Contemporary Control Systems, Inc. Contemporary Controls Ltd
2431 Curtiss StreetSovereign Court Two
Downers Grove, Illinois 60515 USA Univ. of Warwick Science Park
Tel:[phone]Sir William Lyons Road
Fax: [phone] Coventry CV4 7EZ UK
E-mail:[e-mail] [phone]
WWW:http://www.ccontrols.com:[phone]
E-mail:[email protected]
Disclaimer
Contemporary Control Systems, Inc. reserves the right to make
changes in the specifications of the product described within this
manual at any time without notice and without obligation of
Contemporary Control Systems, Inc. to notify any person of such
revision or change.
Tel:
Fax:

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Contents
Chapter1 Introduction.........................................................6
Description ................................................................... 6
Specifications ............................................................... 7
Connector Information .................................................8
Mechanical Drawing .................................................... 9
Ordering Information .................................................. 9
Chapter2 Operation .......................................................... 10
Description ................................................................. 10
Theory of Operation.................................................... 11
Setup and Addressing........................................... 11
Protocols ............................................................... 11
Subnet Communication Upon
Network Failure.................................................... 12
Hardware Requirements ............................................. 12
Design Considerations................................................ 13
NCM Compatibility .............................................. 13
Quantity of Routers Needed ................................. 13
Physical Considerations ....................................... 13
Design Summary .................................................. 13
Design Restrictions .............................................. 15
Network Management Staff Involvement ............ 16
Metasys May Be Affected..................................... 16
Chapter3 InstallationandCommissioning........................17
Hardware Installation ................................................. 17
Configuring the JC-MER-CXB .................................. 21
Connecting Field Cables.............................................22
Reconfiguring the System .......................................... 24
Adding a New NCM or PMI/OWS to
an Existing Subnet ............................................... 24
Moving an Existing NCM or
PCI/OWS to a Different Subnet ........................... 25
Mounting ............................................................... 17
Powering ............................................................... 18
Indicator Lights and Booting ................................ 20
Bash Prompt & JC-MER-CXB Commands .......... 20
Adding a New Metasys ARCNET Subnet ................. 26
Changing the Ethernet Network ................................. 28
Changing the Layout of the Metasys Network .......... 28

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Chapter4 Troubleshooting ................................................30
Booting Up the Router ............................................... 30
Debugging Ethernet Failures..................................... 30
Ping Command .............................................. 32
Ipstat Command .............................................. 33
Testnet Command .......................................... 33
General Problem Prevention...................................... 33
Debugging ARCNET Failures .................................. 34
Debugging Router Failures........................................ 34
JC-MER-CXB Does Not Run When Booted ...... 34
Status Screen Indicates Failure Number 113 ...... 34
Status Screen Indicates Failure Number 101 ......34
Status Screen Indicates Invalid Messages...........34
Metasys Devices Do Not Respond.......................35
All the Devices on One ARCNET
Segment Do Not Respond ...................................35
Multiple ARCNET Segments
Do Not Respond ..................................................35
JC-MER-CXB Does Not
Respond to Ping Requests ...................................35
N1 Communications Are
Occasionally Unreliable ...................................... 36
Data Cannot Be Viewed on OWS
Across Network ...................................................36
Chapter5 Service ............................................................... 37
Warranty..................................................................... 37
Technical Support ...................................................... 38
Warranty Repair......................................................... 38
Non-Warranty Repair ................................................ 38
Returning Products for Repair................................... 39
...
... ...
...

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JC-MER-CXB Program (router) ............................ 42
Ethernet Communications Tests (testnet) .............. 42
Determining the MAC Address (getmac) ............... 42
Configuration Download (download) .................... 43
Software Switches ................................................... 43
Appendix C: Statistics Screen Information .................... 46
Figures
1:RJ-45 Connector ......................................................... 8
2: 3-Pin Connector .......................................................... 8
3: DB9 Connector ........................................................... 8
4: Null-Modem Cable Wiring .........................................8
5: JC-MER-CXB Dimensions ......................................... 9
Tables
1: Common Ethernet Errors ........................................... 32
Appendices Appendix A: Metasys Router Planning Forms............. 40
Appendix B: Common Commands and
Software Switches.................................................. 42
6: Sample Layout of Metasys Ethernet Router ............. 14
7: Using the Panel-Mounting Brackets ......................... 17
8: DC Powered .............................................................. 18
9: Redundant DC Power ............................................... 18
10: AC Powered ............................................................ 19
11: AC Power with Grounded Secondary ..................... 19
12: AC Power with Battery Backup .............................. 19
13: Bash Prompt for the JC-MER-CXB ........................ 20
14: Configuration Screen .............................................. 21
15: Statistics Screen available at COM2 .......................31
16: Example of Testnet Results Screen .........................42
17: Example of Statistics Screen ................................... 46
Appendix G: Linux Trademark Information .................. 50
Appendix D: Setting Up HyperTerminal ....................... 47
Appendix E: Field Connections ......................................48
Appendix F: UDP Port Address Assignments ............... 49
Other Linux Commands .......................................... 45
FTP Files from JC-MER-CXB ................................ 45

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1Introduction
Description
The Metasys Ethernet Router (JC-MER-CXB) provides either router
or gateway connectivity between ARCNET and Ethernet networks.
Sometimes in router/gateway applications, a desktop PMI/OWS
compatible computer is dedicated to the task of executing the applica-
tion program from either a hard disk or floppy disk. On the PMI/OWS
motherboard, two network interface modules are used to connect to
the two networks of interest. With the JC-MER-CXB, this same
functionality can be provided in a compact and reliable configuration.
On the front panel of the JC-MER-CXB is a BNC connector for the
ARCNET and an RJ-45 connector for the Ethernet.
Resident in the JC-MER-CXB is an embedded computer with a solid-
state flash disk capable of executing anapplication program. This user-
supplied application program routespackets between ARCNET and
Ethernet networks that utilize the same network layer or serve as a
gateway between different protocols used by the ARCNET and
Ethernet networks. For example, a popular transport layer for
Ethernet is TCP/IP. To route between ARCNET and Ethernet at the
network layer (IP), ARCNET would need to be operating a TCP/IP
stack as well. For all other situations where different higher-level
protocols are involved, a gateway program would be needed to effect
connectivity between ARCNET and Ethernet. Either situation can
be addressed by the JC-MER-CXB.
To provide ARCNET-to-Ethernet connectivity within a Metasys
system, the JC-MER-CXB was created by installing the necessary
application program onto the flash disk. This product replaces the
JC-MH-16, JC-EP-RG and JC-EP-CS version or model of the
Ethernet router. To configure the JC-MER-CXB, a laptop computer
running a terminal emulation program, like HyperTerminal, is
attached to one of the COM ports using a null-modem cable. Once
configured, the program runs continually.

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Electrical
SPECIFICATIONS
DC AC
Input voltage: 10–36 volts 8–24 volts
Input power: 8 W 8 VA
Input frequency: N/A 47–63 Hz
Environmental
Operating temperature: 0°C to +60°C
Storage temperature: –40°C to +85°C
Humidity: 10% to 95%, non-condensing
Shipping Weight
1 lb. (.45 kg)
Compatibility
ANSI/ATA 878.1 and IEEE 802.3
Regulatory Compliance
CE Mark
CFR 47, Part 15 Class A
UL 508 Listed Device
LED Indicators
Status — multicolor (see page 20for details)
ARCNET Ethernet
RX — green LINK/ACT — green/yellow
ACT — yellow DUP — green/yellow
Ethernet Data Rates
10/100 Mbps
ARCNET Data Rate
2.5 Mbps
cUL 22.222 #14
(intended for use with Class 2 circuits)

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Figure 4— Null-Modem Cable Wiring
Connector Information
Ethernet Socket Pin Assignments (RJ-45 Connector)
1 TD+
2 TD–
3 RD+
6 RD–
(all other pins are unused)
Figure 1 — RJ-45 Connector
ARCNET Socket Pin Assignments (RJ-45 connector)
4 Line – (Phase B)
5 Line + (Phase A)
(all other pins are unused)
ARCNET Socket Pin Assignments (3-pin screw terminal connector)
485 485X
SH Shield Shield
B Line – Line
A Line + Line
Figure 2 — 3-pin Connector
COM1 & COM2 Pin Assignments (DB9 connectors)
PIN Signal Function
2 RXD Receive Data
3 TXD Transmit Data
5 GND Ground
(all other pins are unused)
Figure 3 — DB9 Pins
COM1 & COM2 EIA-232 Communication Parameters (DB9 connectors)
Baud Rate 57,600 bps
Data Bits 8
Parity
No Parity
1
Stop Bit

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Metasys Ethernet Router OrderingInformation
Mechanical
Figure 5— JC-MER-CXB Dimensions
JC-MER-CXB Coaxial Cable Dipulse Transceiver
ELECTROMAGNETIC COMPATIBILITY
JC-MER-CXB units comply with Class A radiated and conducted
emissions as defined by CFR 47, Part 15 and by EN55022. This
equipment is intended for use in non-residential areas.
Warning
This is a Class A product as defined in EN55022. In a domestic
environment this product may cause radio interference — in which
case the user may be required to take adequate measures.

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2Operation
Description
The JC-MER-CXB integrates Metasys N1 LAN segments with an
Ethernet network that uses the TCP/IP (Transmission Control
Protocol/Internet Protocol) suite. The router provides the physical
connection between a Metasys ARCNET segment and the Ethernet
network. It takes advantage of a customer’s existing Ethernet
network, while maintaining the dedicated Facility Management
System (FMS) communications necessary for complex, time-critical,
local control strategies.
With the JC-MER-CXB, Metasys controllers communicate transparently
over Ethernet, using standard components and maintaining complete
compatibility with existing network equipment. From an operator’s
view, this coupling of the N1 LAN to Ethernet creates a single large
network. No special commands are necessary to switch between
networks; data automatically transmits between networks without
operator knowledge or intervention.
The JC-MER-CXB communicates over an Ethernet network using the
TCP/IP protocol. Two networked JC-MER-CXBs pass ARCNET
data between themselves using the User Datagram Protocol (UDP)
service provided by TCP/IP. On the Ethernet network, the router is
seen as a workstation passing messages to another workstation. If a
power failure occurs, the router automatically restarts communications
once power is restored.
The JC-MER-CXB is derived from an earlier version of this device that
was an expansion module that occupied two slots of a Contemporary
Controls MOD HUB ARCNET Modular Active Hub. The new device
can be powered from an available low-voltage source or with an
optional wall-mount transformer. The ARCNET and the Ethernet
connectionsare made through portson the front panel of the device.
Unlike a PMI/OWS, the JC-MER-CXB has no monitor or keyboard.
Instead, the monitor/keyboard functionality is done by an external
laptop or desktop computer running a terminal emulation program (like
HyperTerminal), while connected to COM ports on the JC-MER-CXB.

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The JC-MER-CXB program is accessed via COM2. The embedded
operating system is accessed via COM1. If a terminal emulation
program is attached to COM2, real-time routing statistics can be
observed. But once the router is started, no such cable connection is
required for continued operation.
TheoryofOperation
Setup and Addressing
The method of linking the two networks is to separate the N1 LAN
into a number of ARCNET subnets. (In this document, the terms
“subnet” and “ARCNET segment” are the same.) Each ARCNET
subnet then connects to the customer’s Ethernet network via a single
JC-MER-CXB.
The router uses the N1 network addressing scheme to route messages
among the various ARCNET segments. Dividing Metasys into
multiple subnets has no affect on existing Ethernet communications,
and again, remains transparent to the operator.
To the operator, the router is simple to use and maintain. Once it is
configured to the customer’s network, the router works on its own,
uninterrupted. Branch office personnel configure the unit (via
HyperTerminal) by accessing a single screen. Once set, the data is
saved to a flash disk. Upon power up, the program and configuration
data is executed without any intervention. There are no moving
storage devices on the unit.
Protocols
The JC-MER-CXB uses the UDP/IP communications protocol to
transmit messages across the Ethernet network. This is important
because it allows the router to easily integrate into existing customer
networks that comprise multiple Internet (TCP/IP protocol suite)
networks.

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Even though the JC-MER-CXB looks like a data router to the Metasys
Network, most communications experts would call it a network
gateway. To the Ethernet network, the router looks like a normal
IBMPMI/OWS workstation. Unlike typical network gateways and
routers, the JC-MER-CXB does not process:
•routing protocols used by standard network routers, except for
UDP/IP communications from other JC-MER-CXB units
•messages not generated by Metasys
The JC-MER-CXB responds to TCP/IP “ping” commands, allowing
you to verify that the router is operational and properly connected to
the Ethernet network. However, the ping could fail if a firewall
blocks it from reaching the intended target.
Subnet Communication Upon Network Failure
If the Ethernet network goes down, or the router disconnects or fails,
each Metasys subnet continues to function on a standalone basis. A
JC-MER-CXB: failure looks like a general failure of the Metasys N1
network. Devices on a subnet are still able to communicate with other
devices on that subnet, but devices on a different subnet are offline.
HardwareRequirements
The following are other hardware requirements of the JC-MER-CXB:
•Metasys Network with NCM200 or NCM300 or NCM4500 at
any revision; or, NCM101/NCM401at Revision K or later
•10BASE-T/100BASE-TX Ethernet connection
•ARCNET connection (i.e., Metasys N1 LAN)
•10–36 VDC or 8–24 VAC power at each JC-MER-CXB location

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DesignConsiderations
NCM Compatibility
The JC-MER-CXB is compatible with all versions of the NCM200,
NCM300 and NCM4500. If NCM101s/401s are used, they must be
Revision K or later. EPROM chips in older NCM101s/401s can be
upgraded for compatibility with the JC-MER-CXB. For information
about upgrading, contact Field Support Services. (The NCM102 does
Quantity of Routers Needed
The quantity of JC-MER-CXBs you need is identical to the number of
ARCNET segments connected through the Ethernet system. For
example, two units are required to connect two ARCNET segments
over one Ethernet segment (see Figure 6). A router is placed at each
location where the Ethernet segment meets the ARCNET segment.
Up to 50 JC-MER-CXB units can be used on each Metasys Network
(i.e., all ARCNET segments).
Physical Considerations
The router can be installed in a variety of ways, depending on the job
site. When selecting a location, consider the following:
1. The location must have access to the customer’s Ethernet
network, the ARCNET segment being serviced,and power.
2. AJC-MER-CXB can be panel-mounted or DIN-rail mounted.
Design Summary
Use these steps as a guideline when designing a JC-MER-CXB
Network, referring to Figure 6for an example:
1. Lay out the network as you would a normal Metasys N1
Network. Determine the number and location of NCMs and
Operator Workstations that will service the facility.
2. Determine which portions of the network will use ARCNET and
which will use Ethernet. The network layout must consist of
multiple ARCNET segments connected by the customer’s
Ethernet network.
The Ethernet network must be a single Local Area Network
(LAN) that can interconnect all of the ARCNET segments.
3.Need power: either 10–36 VDC or 8–24 VAC.
not contain an N1 connection.)

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Note: If the Ethernet network consists of multiple Ethernet segments,
the segments must be connected using LAN Routers that
support the TCP/IP protocol suite. Intermediate networks
that use other communications technology (FDDI, Token
Ring) are acceptable if the intermediate networks are high
speed. Low speed networks (e.g., 9600-baud serial lines) will
cause unacceptable delays to Metasys N1 communications.
The resulting network layout will be similar to the sample
network shown in Figure 6.Each ARCNET segment will have
one JC-MER-CXB attached to it. The ARCNET node address
on each JC-MER-CXB has been preassigned 255.
3. Assign a subnet address to each ARCNET segment. We
recommend using the subnet address “1” for the primary
ARCNET segment, or the segment that has the most devices
attached to it. Assign a unique node address to each NCM or
Operator Workstation attached to the N1 network. Node
addresses must be unique even if the NCMs are attached to
different subnets. Record the subnet and node address
information on the JC-MER-CXB Planning Form A.
(See Appendix A:Metasys Ethernet Router Planning Forms.)
Figure 6—Sample Layout of the JC-MER-CXB

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4. Have the customer’s network communications staff assign IP
addresses and provide IP routing information for each
JC-MER-CXB. Record this information on the JC-MER-CXB
Planning Form B. (See Appendix A: Metasys Ethernet Router
Planning Forms.) Append the ARCNET Subnet addresses from
Form A to Form B.
5. Using the JC-MER-CXB Planning Form B, configure each
router by accessing its configuration screen. (See Chapter 3.)
6. Use the assigned subnet and node addresses to address each of
the Metasys NCMs and PMI/OWSs. When creating the DDL
files for the system, use the subnet and node addresses in the
NETWORK and GLOBAL DDL files.
Note: Since you are converting multiple standalone networks into
one large network, verify that no duplicate system names
exist. If duplicates exist, you must change them to unique
system names in both DDL and GPL.
If you are converting an existing system to use JC-MER-CXB units,
you’ll need to update and recompile the DDL files when the routers
are installed. Be sure to recompile all of the DDL files, including
all of the NC files. Failure to recompile all of the DDL files and
download ALL devices could result in application failures for those
NCMs located on new ARCNET segments.
Design Restrictions
1. The system should not use any realtime control strategies that
require data transfers across the Ethernet network. Because the
Ethernet network may experience delays and down time caused
by non-Metasys equipment, the network is subject to variations
in performance.
Realtime control strategies can be used between NCMs located
on a common ARCNET segment.
2. Use caution when defining critical alarm reports that must cross
the Ethernet. Avoid alarms related to life safety because they
may not arrive at the Operator Workstation or printer if the
customer’s Ethernet network is down.
Note: Global and Model DDL file must be the same at all of the
OWS (Operator Work Stations).

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3. Use of a customer’s Wide Area Network (WAN) is not
recommended. The delays associated with Wide Area Networks
may be unacceptable for operation of the Metasys Network.
4. If the system contains a JC/85 Gateway, the Gateway points should
not be mapped to objects that reside in NCMs located on different
subnets.
The JC/85 Gateway obtains the status for all objects that are
defined in the Gateway at frequent intervals (every 1-5 seconds).
This creates a large amount of message traffic on the N1
network. If this message traffic is routed across the Ethernet, it
will (a) add excessive loading to the customer’s Ethernet
network, (b) slow down the operation of the JC/85 Gateway, and
(c) result in sporadic offline reports for objects located in the
remote NCMs.
5. For the same reasons, if the system contains a Network Port, the
Network Port cannot map its analog data points to objects that
reside in NCMs located on different subnets.
6. As with all Metasys networks, each NCM and PCI/OWS in the
network must use a common time zone, even if the devices
physically reside in different time zones.
Network Management Staff Involvement
When installing the JC-MER-CXB, work closely with the network
management staff at the job site. They will know the intricacies of
the Ethernet network to which you will be connecting. Get them
involved as much as possible. They should be able to provide you
with the following:
•Ethernet connections
•assignment of IP addresses
•debugging expertise during installation and commissioning of
the JC-MER-CXB
Metasys May Be Affected
Realize that the Ethernet network will affect the Metasys N1
Network. It can do so in these ways:
•Ethernet traffic may slow down the performance of the Metasys
N1 Network.

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3InstallationandCommissioning
HardwareInstallation
For quick snap-mounting to 35 mm DIN rail, a reinforced DIN rail clip
is pre-attached to the back of the enclosure with two #4-40 pan-head
screws. If the clip is removed, the unit can be panel-mounted by
extending the top and bottom brackets which are shipped in retracted
position. The extended brackets can then anchor the unit to a wall or
other flat vertical surface with two #8 pan-head screws (also provided).
The left illustration of Figure 7shows a rear view of the unit with the
brackets in retracted position. The right illustration of Figure 7shows
the brackets extended and secured to the unit enclosure with the same
screws that were used in the retracted position.
Mounting
TS-35 DIN Rail Mounting Panel Mounting
DIN rail clip Panel mounting brackets
DIN rail clip support bracket 4-40 screws, flat-head (4)
4-40 screws, pan-head (2)
Figure 7— Using the Panel-Mounting Brackets
The JC-MER-CXB is designed for mounting in an industrial enclosure
or wiring closet using either set of provided mounting hardware listed
below. The unit can also rest unsecured on a flat surface, if desired.
#8 screws, pan-head (2)

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Powering the JC-MER-CXB
To operate, the JC-MER-CXB requires low-voltage AC or DC power
provided to its four-pin removable keyed connector. Consult the
specifications for power requirements. There are several means for
providing power.
DC Powered
Make connections as shown in the diagram. The unit uses a DC-DC
converter that accepts a wide range of voltage (10–30 VDC) which it
converts for internal use. The “0Vdc” connection is connected to
chassis within the unit. Input connections are reverse-voltage protected.
Figure 8— DC Powered
Redundant DC Powered
Redundant diode-isolated DC power inputs are provided on the unit
when a concern exists that the unit remain operational in the event of
a primary power failure. Make connections as shown in the diagram.
Each power supply must be capable of powering the unit. Do not
assume that input currents from the two supplies will be balanced.
Figure 9— Redundant DC Power

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AC Powered
If only AC power is available, the JC-MER-CXB can be powered by
the secondary of a low-voltage transformer whose primary is
connected to the AC mains. The secondary must be 8–24 VAC and
ungrounded. When using a grounded secondary transformer, refer to
Figure 11. For convenience, two auxiliary power supplies are
available from Contemporary Controls: the AI-XFMR is for 120 VAC
primary power and the AI-XFMR-E uses 230 VAC.
Figure 10 — AC Powered
Figure 11— AC Power with Grounded Secondary
AC Powered with Battery Backup
The JC-MER-CXB can also be powered from both an AC and DC source.
Usually the DC source is from a battery connected as the DC powered
option. Refer to Figure 12for details. In this application the unit does
not charge the battery, so separate provisions are required for charging.
If the AC source fails, the unit will operate from the battery.
Figure 12— AC Power with Battery Backup

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Indicator Lights and Booting
STATUS: At power on, this LED briefly glows red as a test. Then
while Linux boots (about 16 seconds), it flashes green. It then glows
solid to indicate Linux is operational — although another 16 seconds
must pass before ARCNET is functional. If this LED glows red during
normal operation, a power supply problem is indicated; if the external
power source is within specification, the JC-MER-CXB needs service.
ARCNET: If the unit is connected to a working ARCNET network,
the “RX”LED glows green whenever the unit receives data — otherwise
the “RX”LED will remain unlit. If the unit is disconnected from the
network, the “RX”LED will glow by default. The “ACT”LED flashes
yellow whenever the JC-MER-CXB is engaged in ARCNET activity.
Ethernet: After 2–3 seconds into the boot process (and thereafter), the
“LINK/ACT”LED will glow if a valid link exists to an working Ethernet
device. It indicates speed by color: green for 100 Mbps and yellow for
10 Mbps. It flashes to indicate activity. The “DUP”LED glows green to
indicate full-duplex operation and yellow for half-duplex.
Bash Prompt and JC-MER-CXB Commands
The JC-MER-CXB uses the Linux operating system. When the Linux
command line is displayed on screen, a special "bash" prompt appears.
Because it is derived from the Bourne shell, the prompt is known by
the pun:Bourne Again Shell, or bash. It is the standard command-line
interface on most Linux machines. All command-line entries for the
JC-MER-CXB must use lower case letters!The bash prompt for the
JC-MER-CXB is shown below.
Figure 13— Bash Prompt for the JC-MER-CXB