Watlow NAFEM Gateway User Manual

NAFEM Gateway

User’s Manual

For Watlow part numbers NGW0-0000-0000, NGW0-0000-2400, NGWC-0000-0000, NGWC-0000-2400

1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota USA 55987-5580 Phone: +1 (507) 454-5300, Fax: +1 (507) 452-4507, Internet: http://www.watlow.com

0600-0040-0002 Rev C $10.00

September 2004

NAFEM Gateway

Table of Contents Page

Product Overview 4

Network Services 4

Ethernet Gateway Architecture 5 Ethernet Wiring 5 Authentication and registration 6 Program Upgrades for Connected Devices 6 Alarm Notification 6 Supervisory Control and Data Acquisition 6 Poll Engine 6 Device Protocol 6

Installation & Wiring 7

Sample Decals 8

Configuration Overview 9

Getting Started 9

Password 10

View 11

Monitor Alarm 11 Monitor Configuration 12 Monitor Data 13 Monitor Notification 14

Configuration 15

Administration Community 15 Administration Network 16 Administration Notification 17 Asset Management Component Part ID 18 Asset Management Equipment ID 19 Bulk Transfer File Items 20 Bulk Transfer File Transfer 21 Bulk File Transfer Notification 22 Clock/Calendar Clock 23 Inventory Configuration 24 Inventory Data 25 Inventory Notification 26 Inventory Storage 27 Maintenance Notification 28 Maintenance Process Item 29 Maintenance Scheduled Item 30 Maintenance Unscheduled Item 31 Notify Host 32 Notify Event Log 33 Security User 34 Utility Alarm 35 Utility Management Configuration 36 Utility Management Data 37 Utility Notification 38

2

Email Configuration 39 Gateway Serial Channel Entry 40 Gateway Serial Device Entry 41 Gateway Serial Point Entry 42

System Info 43

Diagnostics Defaults 43 Diagnostics Timing Analysis 44 Diagnostics Timing Configuration 45 Diagnostics Pool Memory 46 Diagnostics TCP/IP Stack 47 Diagnostics Event Log 48

Specifications 49

Operation 49 Real-time Clock 49 Serial Communications 49 Connectors 49 Power 49 Environmental Conditions 49

NAFEM Data Protocol Declaration of Conformity 50

How to Reach Us 51

Technical Assistance 51 Warranty 51 Returns 51 Your Feedback 51

3

Introduction

This manual is intended for the user who is already familiar with the NAFEM protocol, Ethernet and Modbus RTU. For more information see:

NAFEM Data Protocol User Manual located at:

http://www.nafem.org/resources/tech/DataProtocol.cfm

MODBUS RTU Standard located at:

http://www.modicon.com/techpubs/toc7.html.

RFCs located at: http://www.ietf.org/

Product Overview

The NAFEM Gateway has three physical connectivity points to the physical world; the device’s EIA-485 serial communication port, the RJ45 Ethernet network communication port (10BaseT) and the power supply jack.

The NAFEM Gateway is a protocol converter that connects Modbus devices to the NAFEM protocol using an Ethernet connection. The requirements are set forth by the selected protocols of register based Modbus RTU for control devices and NAFEM Data Protocol [NDP] using digital signal connectivity.

This Gateway device performs these tasks with the use of six firmware components; Poll Engine, Alarm Module, SNMP v1 Agent, Web Server, TFTP Client, and a Device Protocol Driver. In addition, a database resides within the Gateway that contains the NAFEM Objects. This is where the information is exchanged between the NAFEM and Modbus elements.

The function of the Gateway is to receive request for reads and writes of NAFEM Objects. These objects are the registers within the devices. This request comes to the Gateway in the format of the NAFEM protocol. The Gateway converts the request into the appropriate Modbus RTU packet and forwards the information to the device. Up to 8 devices may be connected to the serial port. The Gateway can access up to 64 registers divided between these devices. The information returned to the Gateway from the device is converted into the NAFEM protocol and sent to the SNMP Manager or to the Web browser. The Trivial File Transfer Protocol (TFTP) is used when program updates are sent to the Gateway or to a device capable of flash re-programming.

Network Services

The NAFEM Gateway supports DHCP client, AutoIP, and static IP for address assignment. Normally you will not need to make any changes. The user is able to configure preferences as to which services are used if available. Intelligence is employed within the Gateway to revert to backup IP assignment methods if the primary method is unavailable.

4

Ethernet Gateway Architecture

Ethernet Wiring

Connect the RJ-45 Ethernet jack to a Hub or Switch with standard CAT5 cable. The Gateway is a 10BaseT device, so a switch is the best solution for a multi-speed network. The device can be connected directly to a computer's Ethernet jack with a crossover cable.

5

Authentication and registration

Authentication and registration of the Gateway to the Ethernet is accomplished via a DHCP Client to a system DHCP service if available. This may take up to 1 minute. The result of the DHCP method will define the device's Internet Protocol address, SubNet mask and Default gateway. The Microsoft AutoIP scheme is employed to address possible networking environments where DHCP services are not available.

The Ethernet interface is designed to work without user intervention on most networks. Just connect to an Ethernet network and browse the device. In order for the Gateway to communicate over an Ethernet network, an address must be established and registered.

Program Upgrades for Connected Devices

Internal TFTP client protocol services will provide program upgrades over the network communications port to a system TFTP server. This provides support for:

• Flash update of Gateway code

• Flash update of Modbus RTU code for products that support field firmware update

• File Transfer of multiple register RTU

Alarm Notification

This functioning and behavior is provided by the internal Firmware Alarm module and utilizes the Trap function of the SNMPv1 Agent. Alarms are defined within the NAFEM PROTOCOL USER MANUAL along with the behavior for acknowledgement and retries. All alarms specified and enabled by the user follow this scheme. The Alarm notification supports:

- Clear Reset Alarm Action

- Bypass Disable Alarm Action

Supervisory Control and Data Acquisition

The Poll Engine reads parameters from the connected equipment and records the readings into the Data Value of the assigned NAFEM Object Group for retrieval and review by the user via the SNMP Agent services. Upon the modification of parameters via the SNMP v1 Agent by the user, the Poll Engine will write parameters to the connected device.

Poll Engine

When the Poll Engine attempts to read from a remote device and an error occurs, the Poll Engine will immediately retry to read from the remote device. If all retries have failed, then the Poll Engine shall increment the protocol read message failure count by one and attempt the next poll attribute. If all active attributes for a single device fail, then the poll engine shall disengage the device from the poll cycle.

When the Poll Engine attempts to write to a remote device and an error occurs, the Poll Engine will immediately retry writing to the remote device. If all retries have failed, then the Poll Engine shall increment the protocol write message failure count by one and reset the programmable attribute for the write operation to the previous write value.

Device Protocol

Register based MODBUS RTU device protocol is used for communication between remote devices and the Gateway with the Gateway acting as the communication MASTER. The following functions are supported:

• Register Read

• Register Write

• Block Read

• Block Write

• Diagnostics

• Loop Back

6

Installation & Wiring

Dimensions are in inches

Connect the T+/R+ to the devices’ T+/R+ terminals, the T-/R- to the devices’ T-/R- terminals and the Com to the devices’ Com terminal in a daisy chain fashion.

Plug in an RJ45 Category 5 straight wired cable to an Ethernet switch / hub. If you are connecting directly to a PC, you will need to use an RJ45 Category 5 cross-wired cable.

For Models NGWC-0000-0000 and NGW0-0000-0000, connect the 5-volt power supply plug to the power supply jack. The inner terminal of the coaxial plug is positive.

For Models NGWC-0000-2400 and NGW0-0000-2400, connect the 24-volt power supply plug to the power supply jack. The inner terminal of the coaxial plug is positive.

Note: Use proper ESD handling procedures when making connections to unit. A UL Class 2 and CE approved power supply is required for compliance.

7

Sample Decals

8

Configuration Overview

Two services are available within the Gateway or configuration. Either an HTTP browser or an MIB browser may be used for configuration. An MIB browser and compiler is available from MG-SOFT Corp. @ web site http://www.mg-soft.com.

Using a Network Browser Client with the on board Web Server provides the ability to configure the NAFEM Gateway. Various HTML formatted pages are embedded within the device to provide a Graphical User Interface (GUI) for configuration and review of the Gateway device.

A maximum of 8 devices may be connected to the EIA-485 port of the NAFEM Gateway. You will need to configure the baud rate and Modbus addresses of the devices from the face of the devices. The choices for baud rate are either 9600 or 19200. All devices must be set to the same baud rate. The addresses can be set from 1 to 247. Each device must have a unique address.

Getting Started

Perform these steps;

1. Connect the NAFEM Gateway to your computer’s Ethernet port using a cross wired RJ45 cable or connect the Gateway to a hub or network using a straight wired RJ45 Category 5 cable. The Gateway is limited to a 10BaseT connection and will not work on an Ethernet port set for 100BaseT only. Use of a 10/100 hub will overcome this issue if your PC has only a 100BaseT port.

2. Wire the temperature devices to the Gateway’s EIA-485 port.

3. Attach the appropriate power supply (5-volt or 24-volt DC) to the Gateway. The center pin is positive.

4. Configure each device to the same baud rate (9600 or 19200) from the front panel of the device. Set each device’s Modbus address to a unique number. As an example, set the first device to address 1, the second to address 2 and so on.

5. Power up the Gateway, devices and PC.

6. Start your Internet browser. Enter the TCP/IP address of the Gateway into the browser’s address field. Two different addresses may be used to access the Gateway. Either NDPxxxxxx, where xxxxxx is the first six digits of the serial number, or WATxxxxxx, where xxxxxx is the last six digits of the Gateway’s MAC address. The MAC address is printed on a decal in the form xx:xx:xx:xx:xx:xx.

7. Select the Configuration, Gateway setup Page.

8. Configure the Serial Channel Entry, Serial Device Entry, and Serial Point Entry indexes.

The Gateway supports DNS client and Netbios name resolution. Configuration information may be entered at the Configuration, Administration, Administration Network page.

9

Password

Enter Network Password each time. The default is: User Name = new Password = new

You may change these on the Security User screen.

10

View

Monitor Alarm

Select Monitor, Alarm to access Monitor Alarm information. Note: Click Submit to save changes. Reset will return these settings to the previous values if you have