Rockwell Automation 1770-KF3 User Manual

DH485 Communication Interface

(Cat. No. 1770KF3)

User’s Manual

Important User Information

Because of the variety of uses for this product and because of the differences between solid state products and electromechanical products, those responsible for applying and using this product must satisfy themselves as to the acceptability of each application and use of this product. For more information, refer to publication SGI-1.1 (Safety Guidelines For The Application, Installation And Maintenance of Solid State Control).

The illustrations, charts, and layout examples shown in this manual are intended solely to illustrate the text of this manual. Because of the many variables and requirements associated with any particular installation, Allen-Bradley Company cannot assume responsibility or liability for actual use based upon the illustrative uses and applications.

No patent liability is assumed by Allen-Bradley Company with respect to use of information, circuits, equipment, or software described in this text.

Reproduction of the contents of this manual, in whole or in part, without written permission of the Allen-Bradley Company is prohibited.

Statement of Compliance with Federal Communications Commission

Statement of Compliance with Canadian Department of Communications

Avis de Conformité aux normes du ministère des Communications du Canada

Warning and Caution Symbols

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Operation in a residential area may cause unacceptable interference to radio and TV reception requiring the owner or operator to take whatever steps are necessary to correct the interference.

Le présent appareil numérique n'émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada. L'exploitation faite en milieu résidential peut entraîner le brouillage des réceptions radio et télé, ce qui obligerait le propriétaire ou l'opérateur à prendre les dispositions nécessaires pour en éliminer les causes.

Throughout this manual, we make notes to alert you to possible injury to people or damage to equipment under specific circumstances.

WARNING: Tells readers where people may be harmed if procedures are not followed properly.

CAUTION:

loss can occur if procedures are not followed properly.

Warnings and Cautions:

identify a possible trouble spot tell what causes the trouble give the result of improper action tell the reader how to avoid trouble

Tells readers where machinery may be damaged or economic

WARNING: No user serviceable parts or adjustments inside module.

Refer servicing to qualified personnel.

 1991 Allen-Bradley Company, Inc.

IBM and AT are registered trademarks of the International Business Machine Corporation. PLC is a registered trademark of Allen-Bradley Company, Inc.

Manual Overview P1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Audience P1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preface

Manual

Overview

Audience

Related Publications

This manual:

describes the features and capabilities of the 1770-KF3 tells you how to install, configure, and operate your 1770-KF3 gives troubleshooting tips on diagnosing problems defines the specifications of the 1770-KF3

Read this manual if you are installing and configuring a 1770-KF3 Interface Module for use with a DH-485 network.

You should be familiar with:

Allen-Bradley SLC 500 series of programmable controllers Allen-Bradley DH-485 networks

Publication Publication Number

Data Highway/Data Highway Plus/DH-485 1770-6.5.16 Protocol and Command Set Manual

SLC 500 Advanced Programming Software Manual 1747-801

Interface Connections

To install the KF3, follow these steps:

1. Define your network needs.

2. Construct the necessary cables.

3. Ground and terminate your network correctly.

4. Determine the correct voltage for your application and set the KF3’s

voltage selector. Change power cord if necessary.

5. Check the KF3’s default configuration parameters and change those

which are not suitable for your application.

Figure 2.1 shows the back panel of the KF3, including its two communication connectors. The connector labelled RS-232 Computer connects to the host computer via an RS-232C cable. The connector labelled DH-485 connects to the DH-485 network.

Figure 2.1 KF3

Back Panel

115V/230V

Selector

Voltage

Power Switch

AC power connector (115V/230V)

Fuses

FUSES: 0.1A 250V

TYPE 5mm X 20MM

CAUTION: FOR CONTINUED PROTECTION AGAINST RISK

OF FIRE REPLACE ONLY

WITH THE SAME TYPE AND RA

TING OF FUSE. CAUTION: DOUBLEFOLD NEUTRAL FUSES

DH485 connector links to DH485 network

RS232C connector links to host computer via RS232C cable

21

Chapter 2

Installing the KF3

DH485 Cabling Considerations

Depending on your application, you can use the KF3 module to communicate with a single station via a point-to-point link, or with multiple DH-485 stations (for example, the SLC 500 family of programmable controllers), via the DH-485 network.

You must construct the necessary cable or cables for each application. Use a jacketed and shielded cable with two twisted wire pairs and a drain wire. One pair provides a balanced signal line; one wire of the other pair serves as a common signal reference for all nodes on the link. The shield reduces the effect of electromagnetic noise from the industrial environment. Belden #9842 cable is recommended.

The pinouts for the KF3’s DH-485 connector are shown in Figure 2.2.

Figure 2.2

Pinouts

KF3

FUSES: 0.1A 250V TYPE 5mm X 20MM

CAUTION: FOR CONTINUED PROTECTION AGAINST RISK

OF FIRE REPLACE ONLY WITH THE SAME TYPE AND RA

TING OF FUSE. CAUTION: DOUBLEFOLD NEUTRAL FUSES

22

Grounding and Terminating the Network

The precise configuration of the cable connectors is determined by their position on the network.

Connections between intermediate nodes (nodes that are not at either end of the network) require no jumpers. Table 2.A shows the wire and terminal connections for a cable linking any two intermediate nodes.

Chapter 2

Installing the KF3

Table 2.A Wire/Terminal

For this Wire/Pair Connect this Wire To this Terminal

Shield/Drain Nonjacketed Terminal 2 - Shield

Black/White Black Wire

Black/Red Black Wire

Connections for Imtermediate Nodes

White Wire

Red Wire

Cut back - No connection

Terminal 3 (Signal Ground)

Terminal 4 (Data A)

Terminal 5 (Data B)

The nodes at each end of the network must be terminated. Install a jumper wire between terminals 5 and 6 to enable the impedance built into the module.

One (not both) of the nodes at the end of the network must have an earth ground connection for the communication cable shield. For the node at one end of the network, whether it is the KF3 or some other device, connect the shield to ground by installing a jumper wire between terminals 1 and 2 of the terminal block.

CAUTION: Be sure no other node on the network has its shield connected to ground.

Figure 2.3 illustrates proper jumper connections for end nodes.

Figure 2.3

Connections for End Nodes

Jumper

ground shield

Jumper to terminate node

KF3 on one end of the link

* The black wire of the white/black pair should be cut back (no connection).

Jumper to terminate node

SLC 500 or other device on the other end of the link

23

Chapter 2

Installing the KF3

Host Computer

RS232C Cable

Connecting via a DH485 Link (PointtoPoint Configuration)

Figure 2.4 shows a point-to-point link consisting of a single SLC 500 programmable controller and one host computer station.

Figure 2.4

PointtoPoint DH485 Link

DH485

Cable

Belden #9842

Link

KF3

Coupler 1747AIC

1747C1

1 Cable

SLC 500 Controller

This configuration requires a KF3 and one link coupler. The SLC 500 controller is connected to the link coupler with a 1747-C11 cable. The KF3 is connected directly to the link coupler. In this topology, both the KF3 and the SLC 500 are end nodes.

Construct a cable to attach the DH-485 connector on the back of the KF3 module to the link coupler. Figure 2.5 shows the connection for a point-to-point DH-485 application. The shield ground could be at either end, but must be at one end, and one end only.

Figure 2.5 Connection

for KF3 and Single SLC

Jumper shield connector

KF3 on one end of the link

* The black wire of the white/black pair should be cut back (no connection).

to ground

Jumper to terminate node

SLC 500 or other device at the other end of the link

24

Chapter 2

Installing the KF3

Connecting to a DH485 Network (MultiPoint Configuration)

Figure 2.6 shows a network consisting of three SLC 500 programmable controllers and one host computer station.

RS232C Cable

Host Computer

Figure 2.6 Connecting

KF3

to Multiple SLC 500s via the DH485 Network

Link Coupler 1747AIC

1747C1

DH485

Cable

Belden #9842

Link Coupler 1747AIC

1747C1

Link Coupler 1747AIC

1747C1

1 Cable

This configuration requires the KF3 and three link couplers:

SLC 500 Controller

one SLC 500 family controller is connected to each of the link couplers

with a 1747-C11 cable

the KF3 is connected to the network at one of the link couplers

the DH-485 cable consists of three segments of cable daisy-chained to

the link couplers and the KF3

The connection between the first node (the KF3) and the link coupler to the second node is shown in Figure 2.7.

25

Chapter 2

Installing the KF3

Jumper

to ground

shield connector

1770KF3 on one end of the link

Figure 2.7 Connection

Jumper to terminate node

* The black wire of the white/black pair should be cut back (no connection).

for First Segment of a Multidrop Network

DH485 Cable

Link coupler to first SLC 500

The cable connecting the second and third nodes of the multidrop network (neither of which is an end station) is shown in Figure 2.8.

Figure 2.8 Connection

Between Two Intermediate Nodes

DEVICE

Cable Belden #9842

o Link Coupler

Red/Black

* The black wire of the white/black pair should be cut back (no connection).

Pair

The connection between the third and fourth (end) node is shown in Figure 2.9.

Cable Belden #9842

FROM

DEVICE

26

Chapter 2

Installing the KF3

DH485 Cable

Figure 2.9 Connection

Third

node

* The black wire of the white/black pair should be cut back (no connection).

for Last Segment of a Multidrop Network

Jumper to terminate node

Fourth node on the end of the multidrop network

Installing the DH485 Cable

The DH-485 cable consists of a number of daisy-chained segments. The total length of the combined segments must not exceed 4,000 feet. Cut the cable segments long enough to route from one node to the next, allowing sufficient slack to prevent strain on the connectors. Provide strain relief for the cable after it is plugged in to prevent the cable wires from breaking.

Link Coupler 1747AIC

Figure 2.10

Connection on a DH485 Link

Cable

BELDEN

#9842

KF3

Connector (Phoenix

MSTB2.5/6ST

BELDEN

#9842

Link Coupler 1747AIC

AU)

27

Chapter 2

Installing the KF3

RS232C Cabling Considerations

Cabling for the RS-232C connector of the KF3 will vary depending on your application. The pinouts for this connector are given in Table 2.B.

Table 2.B RS232C

Signal Abbreviation Direction Pin No. Meaning

Chassis Ground - - 1 The cable shield must be connected to chassis ground at one

Transmit Data TXD Output 2 RS232C serialized data output from the module.

Receive Data RXD Input 3 RS232C serialized data input to the module.

Request to Send RTS Output 4 A request from the module to the modem to prepare to

Clear to Send CTS Input 5 A signal from the modem to the module that indicates the

Data Set Ready DSR Input 6 A signal from the modem to the module that indicates the

Connector Pinouts

end only.

transmit. With fullduplex protocol, RTS is always asserted. With halfduplex protocol, it is turned on when the module has permission to transmit, otherwise it is off.

carrier is stable and the modem is ready to transmit. The module will not transmit until CTS is on. If CTS is turned off during transmission, the module will stop transmitting until CTS is restored.

phone is offhook. It is the modem's answer to DTR. The module will not transmit or receive unless DSR is on. If the modem does not control DSR properly, DSR must be jumpered to a high signal at the module. (It can be jumpered to DTR.)

Signal Ground GND - 7 Signal ground - a reference point for the data signals.

Data Carrier Detect DCD Input 8 A signal from the modem to the module to indicate that the

carrier from another modem is being sensed on the phone line. It will not be asserted unless the phone is offhook. Data will not be received by the KF3 unless DCD is on. With fullduplex protocol, the module will not transmit unless DCD is on. If the modem does not control DCD properly, DCD must be jumpered to DTR at the module.

Data Terminal Ready DTR Output 20 A signal from the module to the modem to connect to the

phone line (i.e., pick up the phone"). The module will assert DTR all the time except during the phone hangup sequence.

Modems built to North American standards will not respond to DTR until the phone rings. The KF3 module will not work correctly with modems which always pick up the phone upon receiving DTR, whether the phone is ringing or not.

28

Chapter 2

Installing the KF3

Use Belden #8723 (or equivalent) cable to construct a cable to connect the KF3 to a computer.

Important: The length must not exceed 50 feet, and the cable shield must be connected to chassis ground (using Pin 1) at the KF3 end only.

There are various cabling options depending on whether or not your application makes use of handshake signals, whether or not you are connecting to a 9-pin serial port for an IBM AT, and whether or not your computer uses standard IBM pinouts. Figures 2.11 through 2.16 are for IBM computers with either 9- or 25-pin connectors. If your computer has a different pinout, construct a cable using the appropriate signal names for your computer.

If you are not using handshake signals, use the three wire connections shown in Figures 2.11 or 2.12.

Figure 2.11 ThreeWire

Connection to IBM Computer (25 pin)

KF3 Computer

TXD 2

RXD 3

GND 7

Shield

Figure 2.12 ThreeW

ire Connection to IBM Computer (9 pin)

KF3 Computer

TXD 2

RXD 3

Shield

3 RXD

2 TXD

7 GND

2 RXD

3 TXD

GND 7

5 GND

29

Chapter 2

Installing the KF3

If your computer requires active DSR and CTS signals, add jumpers to the computer connections as shown in Figures 2.13 and 2.14.

Figure 2.13

Positions for DSR and CTS Lines (25 pin)

Jumper

KF3 Computer

TXD 2

RXD 3

GND 7

Shield

Figure 2.14 Jumper Positions for DSR and CTS Lines (9 pin)

KF3 Computer

Shield

3 RXD

2 TXD

7 GND

4 RTS

5 CTS

6 DSR

8 DCD

20 DTR

210

TXD 2

RXD 3

GND 7

2 RXD

3 TXD

5 GND

7 RTS

8 CTS

6 DSR

1 DCD

4 DTR

Chapter 2

Installing the KF3

If you are using handshake signals with your computer, use the connection shown in Figure 2.15 or 2.16.

Figure 2.15 Connection

to IBM Computer with Handshake Signals (25 pin)

KF3 Computer

TXD 2

RXD 3

RTS 4

CTS 5

GND 7

DSR 6

DCD 8

DTR 20

Shield

Figure 2.16 Connection to IBM Computer with Handshake Signals (9 pin)

3 RXD

2 TXD

5 CTS

4 RTS

7 GND

20 DTR

6 DSR

8 DCD

KF3 Computer

TXD 2

RXD 3

RTS 4

CTS 5

GND 7

DSR 6

DCD 8

DTR 20

Shield

2 RXD

3 TXD

8 CTS

7 RTS

5 GND

4 DTR

6 DSR

1 DCD

211

Chapter 2

Installing the KF3

Modem Cabling Considerations

The KF3 is connected to a modem via a direct 25-pin-to-25-pin cable, which you must construct using Belden #8723 (or equivalent) cable.

Important: The length must not exceed 50 feet, and the cable shield must be connected to chassis ground (using Pin 1) at the KF3 end only.

Figure 2.17 Connection

between a KF3 and a Modem

KF3 Modem

TXD 2

RXD 3

RTS 4

CTS 5

DSR 6

GND 7

Shield

2 RXD

3 TXD

4 RTS

5 CTS

6 DSR

7 GND

DCD 8

DTR 20

8 DCD

20 DTR

The KF3 can be connected to standard asynchronous dial-up modems. Important: Some modems are designed to respond to the DTR signal by

answering the phone whether it is ringing or not. Since the KF3 asserts DTR at all times except during the hang-up sequence, the phone would always appear to be “busy.” Do not use the KF3 with any type of modem that answers the phone as soon as DTR is asserted.

The types of dial-up network modems that you can use are:

Manual: These are typically acoustically coupled modems. The

connection is established by human operators at both ends, who insert the handsets into couplers to complete the connection.

DTE Controlled Answer: These unattended modems are directly

connected to the phone lines. The KF3 serves as the data terminal equipment to control the modem via the DTR, DSR, and DCD signals. The module incorporates timeouts and tests to properly operate these types of modems.

212

Chapter 2

Installing the KF3

Auto-Answer: These modems have self-contained timeouts and tests,

and can answer and hang up the phone automatically.

The module has no means of controlling an auto-dial modem, but it can be used in conjunction with a separate auto-dialer.

Voltage

Selection

CAUTION: The KF3 must be set to the correct voltage before it is powered up. Connecting to 115V power with the switch set to 230V will result in erratic operation. Connecting to 230V power with the switch set to 115V can damage the module.

The power select switch is located on the back panel. The switch is set at the factory for 115V operation.

115V Operation

Ensure the switch is set to “115V” as shown in Figure 2.18. Plug the power cord supplied with the KF3 into the connector on the back panel, and plug the other end into any standard 115V AC outlet.

Figure 2.18

Select Switch Set for 115V Operation

Power

Slide

to right for

15V operation

FUSES: 0.1A 250V

TYPE 5mm X 20MM

CAUTION: FOR CONTINUED

PROTECTION AGAINST RISK

OF FIRE REPLACE ONLY

WITH THE SAME TYPE AND RA

TING OF FUSE. CAUTION: DOUBLEFOLD NEUTRAL FUSES

213

Chapter 2

Installing the KF3

Slide

to left for

230V operation

230V Operation

Set the power select switch to “230V” as shown in Figure 2.19.

Figure 2.19 Power

Select Switch Set for 230V Operation

FUSES: 0.1A 250V

TYPE 5mm X 20MM

CAUTION: FOR CONTINUED

PROTECTION AGAINST RISK

OF FIRE REPLACE ONLY

WITH THE SAME TYPE AND RA

TING OF FUSE. CAUTION: DOUBLEFOLD NEUTRAL FUSES

CAUTION: The power cord supplied is approved for 115V operation only. To guard against electrical shock or fire, you must replace the cord with one approved for 230V AC by a recognized agency such as Underwriters Laboratories. To match the KF3 receptacle, the 230V power cord must be terminated with a molded female connector (IEC 320/CEE22).

214

Replacing

Fuses

CAUTION: Before replacing fuses, unplug the module’s power cord.

To replace fuses, insert the fuse into the fuse holder in the cap first. Then insert the combined assembly into the fuse receptacle and tighten with a screwdriver.

CAUTION: If you first put the fuse into the receptacle and then attempt to tighten the cap, damage or breakage may result.

Chapter 2

Installing the KF3

Fuse Holder

Cap Fuse Fuse

Positioning the KF3

Figure 2.20 Replacing

Fuses

Holder Assembly

Fuse Receptacle

Screwdriver

The KF3 is intended to sit on a flat surface, such as a desk top or shelf. It has been designed for operation in both control room and plant floor environments.

Where you place the KF3 is determined largely by the 50-foot RS-232 cable length restrictions, and by access to an AC power outlet.

215

Configuring the KF3

Chapter

Configuration

You configure the KF3’s communication parameters using the push buttons and displays located on the bottom of the module. The module saves them in nonvolatile memory. Factory default settings (shown in Table 3.B) should be adequate for most industrial usages.

Important: Verify that all parameter settings are correct for your purposes before connecting the KF3 to your network.

The KF3 has two modes of operation, run mode and configuration mode. During normal operation, the module functions in run mode. Communication parameters are changed in configuration mode. The module continues to communicate while it is in configuration mode. Changes take effect as soon as they are saved and the module returns to run mode. In run mode, the configuration displays are turned off.

Important: If your displays show symbols other than those shown in this chapter, your module is malfunctioning. Contact your A-B representative.

Figure 3.1 Configuration

Communication

Display and Push Buttons

Parameter

Current

Setting

31

Chapter 3

Configuring the KF3

Displays

Figure 3.1 shows the configuration displays on the bottom of the module. The left display (one digit) shows the number of the communication parameter being configured. The right display (two digits) shows the current setting for that parameter. Communication parameters are configured in two menus, a main menu, for basic parameters, and a submenu, for more advanced parameters.

Push Buttons

Figure 3.1 shows three push buttons labelled View, Data, and Exit. The operation of these buttons is described in Table 3.A.

Table 3.A

Button Operation

Push

Pressing this button or button combination:

View In run mode, takes the module into configuration mode.

Data In configuration mode, cycles through the possible

Exit In configuration mode, from the main menu, returns the module

View + Exit In configuration mode, saves all configuration changes, and

View + Data In configuration mode, resets all communication parameters

Performs this task:

Note: This is the only button that has a function in run mode.

In configuration mode, cycles through the possible communication parameters (displayed on the left digit).

If you hold the button down for more than 1 second, the parameter numbers will advance automatically.

communication parameters for the parameter shown on the left. The data is displayed on the right two digits. If you hold the button down for more than 1 second, the parameter numbers will advance automatically.

to run mode without saving any changes. The change in mode takes effect when the button is released.

From the submenu, returns to the main menu without saving any changes.

returns the module to run mode from either menu. The module will begin operating with the new configuration as soon as it returns to run mode.

to their factory defaults (see Table 3.B). The changes do not take effect until the configuration is saved, and the module returns to run modethat is, until View and Exit are pushed simultaneously.

32

Chapter 3

Configuring the KF3

Configuration Steps

Entering Configuration Mode

1. Press the View button to enter configuration mode. The first

parameter number will be displayed on the left, with its current setting on the right.

The KF3 continues to communicate while in configuration mode. Changes in configuration do not affect operation until they are saved and the module returns to run mode.

Configuring

2. Each time you press the View button, the parameter number in the

left display advances, and the parameter’s current setting appears in the right (data) display.

Press the View button as often as necessary or hold it down until the desired parameter is reached.

3. Once the desired parameter is displayed, press the Data button to

cycle through the available settings.

4. When you have reached the desired data setting, you can either save

the setting and exit configuration mode, or move on to configure the next parameter.

To continue configuration, press the View button until the next parameter you wish to change appears in the display. Use the Data button to modify its setting.

Save and Exit

5. To save the new data and exit configuration mode, press the View

and Exit buttons simultaneously. The parameters you have changed will be saved in nonvolatile memory. If the save is successful, each display will show three dashes (see Figure 3.2) for a period of two seconds. When the module returns to run mode, the new configuration takes effect immediately, and the displays turn off.

If you press View and Exit simultaneously while in either menu, all parameters in both menus will be saved and the module will return to run mode.

33

Chapter 3

Configuring the KF3

Figure 3.2 Successful

Save Display

If the save is not successful, your KF3 is malfunctioning. The left display will show hardware fault number 6 (see Table 5.B) and the front panel fault indicator will light. If this happens, contact your A-B representative.

Exit Without Saving

6. Pressing only the Exit button while in the main menu takes the

module out of configuration mode and into run mode without saving any changes. The previous settings will remain in effect.

Pressing only the Exit button while in the submenu takes the module back to the main menu without saving any changes.

Important: If the module is left inactive (i.e., with no buttons pressed) in configuration mode for 3 minutes, it will return to run mode. Any changes will be lost. If the KF3 is turned off while in configuration mode, any changes will be lost.

Setting Factory Defaults

Pressing the View and Data buttons simultaneously when in configuration mode will reset all parameters to their factory defaults. When this button combination is pressed, the module displays the first parameter and its factory default. Like any other changes, the factory default parameters are not saved until the View and Exit buttons are pressed simultaneously. If only the Exit button is pressed, the module will return to run mode without resetting to factory defaults.

34

Chapter 3

Configuring the KF3

Basic Communication Parameters

For normal operation, the basic communication parameters must be configured. For special communication needs, configure the advanced communication parameters, which permit more flexibility in tuning the operation of the module.

Important: The KF3 is shipped from the factory with the DH-485 Node Address set to 00. If there is to be more than one KF3 on the network, or if a station with this address already exists, you will have to change this parameter setting. The default settings for the other parameters are intended to cover most situations, and need only be changed if they do not meet your requirements.

The basic communication parameters are divided into two groups: those that control the link with the DH-485 network, and those that control the RS-232C link with the computer. The parameter number is shown in the left display, the current setting in the two right displays.

Table 3.B describes each basic communication parameter and its valid settings. The numbers in parentheses are the factory default values as they appear in the display.

Table 3.B

Configuration Parameters

Basic

Parameter Number Parameter Description Factory Default

DH485 Parameters

DH485 Node Address The address of this node on the DH485 network. Valid station addresses

are 0031. Every station on the DH485 network must be given a unique station address. If the KF3 detects another station with the same address, the front panel Fault LED will flash. You should then change this station's address to an unused one.

For optimum network performance, set your stations to consecutive addresses, starting at 0. For example, if you have 4 stations, their addresses should be 0, 1, 2, and 3. This minimizes the solicitation of the new stations that is required.

DH485 Baud Rate Sets the baud rate (the speed in bits/second at which data is transferred)

of the DH485 link. Possible rates are 300 (03), 1200 (12), 2400 (24), 4800 (48), 9600 (96), 19200 (19).

Important: All stations on DH485 must be set to the same baud rate.

Diagnostic Command Execution

Determines whether diagnostic commands are executed directly by the KF3 (01) or whether they are passed through to the host computer (00).

(00).

9600 baud (96).

They are executed by the KF3 (01).

35

Chapter 3

Configuring the KF3

Table 3.B

Configuration Parameters (continued)

Basic

Parameter Number Parameter Description Factory Default

RS232C Parameters

RS232C Baud Rate Baud rate of the RS232C link between the host computer and the KF3.

The host computer and KF3 must be set to the same baud rate.

Possible rates are 300 (03), 600 (06), 1200 (12), 2400 (24), 4800 (48), 9600 (96), 19200 (19).

RS232C Parity Parity of the characters on the RS232C link. Parity can be None (00) or

Even (01). The host computer and KF3 must have the parity set to the same value.

DF1 Device Category Sets the communication protocol to be used on the RS232C link.

Choices are DF1 fullduplex (00), DF1 halfduplex slave, local mode (01), or DF1 halfduplex slave, remote mode (02). See Chapter 4, Communicating with the KF3, for details.

Error Detection Two forms of error detection are available on the DF1 link: BCC Block

Check Code (00) or CRC16 Cyclic Redundancy Check (01).

The application program running on the host computer must use the same error detection as the KF3. Refer to your application user's manual for information on the type of error detection it is using, and set the KF3 to the same value.

Flow Control Determines whether modem handshake lines are used for flow control:

disabled (00) or enabled (01).

Flow control is normally enabled when communicating with a modem.

Duplicate Message Detection

Determines whether duplicate message detection is disabled (00) or enabled (01).

When duplicate message detection is enabled, the KF3 will acknowledge (and discard) duplicate messages.

9600 baud (96).

None (00).

Fullduplex (00).

BCC (00).

Disabled (00).

Enabled (01).

Other Parameters

36

Submenu Parameters Lets you into the submenu to set the advanced communication

parameters; the data display will show two dashes.

See the section on Advanced Communication Parameters for more information.

Series and Revision Displays the series and revision level of the module. The first digit shows

the series (AJ), the second the revision (AJ). For example, Series A, Revision B is displayed as AB." You cannot set this value.

N/A

Chapter 3

Configuring the KF3

Advanced Communication Parameters

The advanced communication parameters are located in the Submenu. When parameter 9, the Submenu entry parameter, is shown on the left display, the Data display on the right will show dashes. Press the Data button to enter the Submenu and display the submenu parameter numbers. The number on the left will change from 9 to 0, and its decimal point will light up, remaining lit as long as you are in the Submenu.

Figure 3.3 Submenu

Submenu Indicator

Indicator

Communication

Parameter

Current

Setting

Important: Changing the default setting of these parameters can disrupt operation of the network.

Once in the submenu, you change parameters and select parameters in the same manner as in the main menu, using the View and Data buttons. When the last submenu parameter is reached, press View to go back to the first submenu parameter.

Press the Exit button alone to return to the main menu without saving submenu changes. Press Exit and View simultaneously to save all changes in both menus and return the module to run mode.

Table 3.C describes each advanced (submenu) communication parameter and its valid settings. The numbers in parentheses are the factory default values as they appear in the display.

37

Chapter 3

Configuring the KF3

Table 3.C Submenu

Parameter Number Parameter Description Factory Default

Maximum Token Holder

The node address of the highestnumbered master station on the Address DH485 link. The valid range for Maximum Token Holder is 0131.

If all stations have consecutive addresses, this parameter should be set to the address of the highestnumbered master station on the link. For example: if there are 5 stations, addressed 0 to 4, this parameter should be set to 04.

This improves the token rotation time (the time it takes for the token to go once around the network) by limiting the station solicitation that is required, but only when all stations have consecutive addresses starting at zero. If gaps exist in the station addresses, setting this parameter to the highest station address will have no effect on link performance.

Note that setting this parameter to the highest station address will not allow new stations above that address onto the network. Their addresses would be above the maximum token holder address, and therefore they would never be solicited to join. Stations with addresses higher than the maximum token holder address value are not solicited to join the network, but are removed from the network. If you want to add new stations, you must reset this parameter to a higher value.

The KF3 will not allow you to set this value to less than its current station address.

Configuration Parameters

(31).

Token Hold Factor The number of message that this station is allowed to send on the DH485

link while it has the token. The valid range is 0110.

Consider carefully before changing this parameter. Setting all stations to a value of 01 gives all stations on the network equal access to the link, and does not allow any one station to affect the performance of other stations. Increasing this value for one station allows that station to hold the token longer if it has more than one message to send. This improves the performance of that station, but at the expense of the other stations on the network.

Number of Retries The number of allowable retries on the RS232C link. Valid numbers are

00 (no retries per attempt) to 10 (10 retries per attempt).

DF1 ACK Timeout The time to wait for an ACK to be received from the host computer. The

timeout is from 0.1 to 5 seconds in 0.1 second increments. To calculate the timeout, multiply the number in the display by 0.1 seconds.

For example: A setting of 14 means 14 x 0.1 = 1.4 seconds.

(01).

2 retries per attempt (02).

1 second (10).

38

Chapter 3

Configuring the KF3

Table 3.C Submenu

Parameter Number Parameter Description Factory Default

CTS to Transmit Delay The delay between the CTS signal and the start of transmission by the

KF3 (halfduplex only). The delay is from 0 seconds to 0.99 seconds, in 10 ms (0.01 second) increments. To calculate the delay, multiply the number in the display by 0.01 seconds.

For example: A setting of 48 means 48 x 0.01 = 0.48 seconds.

This parameter is only required when communicating with the type of radio modem that requires a delay after exerting the Clear To Send (CTS) signal. Refer to your modem manual for information on this point.

This parameter only takes effect when the module is in HalfDuplex DF1 (local or remote) mode and handshaking is enabled. See Chapter 4, Communicating with the KF3, for more details of local and remote modes.

End of Message to RTS Off

The delay between the end of a message and the KF3 setting RTS inactive (halfduplex only). The delay is from 0 seconds to 0.99 seconds, in 10 ms (0.01 second) increments. To calculate the delay, multiply the number in the display by 0.01 seconds.

For example: A setting of 50 means 50 x 0.01 = 0.50 seconds.

This parameter is only required when communicating with modems that require a delay between sending the last character and raising the Request To Send (RTS) signal. Refer to your modem manual for information.

This parameter only takes effect when the module is in HalfDuplex DF1 (local or remote) mode, and handshaking is enabled.

Configuration Parameters

No delay (00).

HalfDuplex Master Station Address

Group Number Used in halfduplex remote mode to provide a means of addressing more

The station address of the halfduplex master device. This value is in octal and can range from 0077 inclusive.

This parameter only takes effect when the module is in halfduplex remote mode. See Chapter 4 remote mode.

than 32 DH485 stations from the halfduplex link. The group number can be 0007 inclusive.

Station addresses for DH485 nodes on a multidrop link combine the group number and the DH485 node address. This parameter only takes effect when the module is in halfduplex remote mode. See Chapter 4, Communicating with the KF3, for more details.

Communicating with the KF3, for more details of

(10 octal).

(00).

39

Chapter 3

Configuring the KF3

Verifying Your Configuration Parameters

Before connecting the KF3 to your network, cycle through the parameter settings. If you have properly defined your network needs, you know what parameter settings your network requires. Compare the parameters you need for your network to the settings in the module. If you have made no changes to the default settings, the values shown in parentheses in the Factory Default column of the Tables 3.B and 3.C should appear in the displays.

When you connect the module to your network and turn it on, the displays will cycle through the numbers 1-3 and then turn off. If your DH-485 parameters are correctly configured, the DH-485 Activity LED on the front of the module will light up. If the Fault LED lights up instead, check your station address, as stated in Parameter Number 0, Table 3.B. If no lights come on, check your DH-485 Baud Rate setting (Table 3.B, Parameter Number 1).

Once you initiate active communication on the DF1 link, the RS-232 Activity LED will light up. If this fails to happen, check your RS-232C parameters (Table 3.B, Parameters 3-8).

If your displays show symbols other than those shown in this chapter, your module is malfunctioning. Contact your A-B representative.

For more information on troubleshooting, see Chapter 5, Troubleshooting the KF3.

310

Chapter

Communicating with the KF3

Read this chapter if you are configuring a half-duplex network or if you plan to write a communication driver. A thorough understanding of DF1 protocol, PLC command sets and the use of slave devices on the DH-485 communication network is required.

DF1 Communication

The KF3 supports full-duplex DF1 protocol and half-duplex DF1 slave protocol on its RS-232C connection to a host computer. The details of these protocols can be found in the Data Highway/Data Highway Plus/DH-485 Protocol and Command Set Manual.

Full-duplex DF1 protocol is provided for applications where high performance peer-to-peer communication is needed.

The KF3 provides two modes of addressing in half-duplex: local and

remote modes. You select one of these by configuring Submenu option 5 – DF1 Device Category (see Table 3.C).

Local mode is provided for compatibility with earlier DF1 products, such as the 1770-KF2. Some users may prefer local mode for use in applications where the RS-232C link is not multidrop, since it simplifies the polling algorithm.

Remote mode should be used with a half-duplex master, such as the 1771-KGM, or when SLC 500 communication is added to existing half-duplex networks. Because the KF3 is transparent to the master device, existing drivers can be used without rewriting.

FullDuplex DF1 Protocol

In full-duplex mode, the KF3 detects embedded responses. The module will not send embedded responses until it receives one from the host. The KF3 makes the assumption that if a host computer sends embedded responses, it can also receive them.

In full-duplex mode, the destination address in a packet sent from the host computer to the KF3 is the address of the DH-485 network node for which the packet is intended. The source address in packets received by the host computer from the KF3 is the node address of the sender.

41

Chapter 4

Communicating with the KF3

HalfDuplex DF1 Protocol  Local Mode

Local mode requires an intelligent master device, capable of specifying both a station address and a destination address. Because the KF3 acts as a slave on a DF1 half-duplex network, the half-duplex master’s access to the DH-485 nodes is indirect: i.e., the destination address and the station address are generally different.

In local mode, the polling algorithm used by the half-duplex master is simplified so that the master only needs to poll the single KF3. The KF3 will respond to messages from the half-duplex master only if the station address contained in these messages is the node address of the KF3. The KF3 then forwards the packet to the appropriate DH-485 node, as defined by the destination address. Responses from remote nodes on the DH-485 network will contain a destination address equal to that of the KF3, and not that of the half-duplex master device. The KF3 will respond to poll packets from the half-duplex master by returning whatever data has been forwarded to it by the remote nodes under its jurisdiction.

Host

Computer

(Master)

RS232C Cable

Figure 4.1

Mode Addressing

Local

Link Couplers

SLC 500 Controller

KF3

Node

Node01Node

DH485

Network

Node

In Figure 4.1, the half-duplex master running on the computer only polls the KF3 at station address 01. Messages from the half-duplex master to the SLC 500s are sent using a master message containing both the station address of the KF3 (01) and the destination address of the SLC 500 (03, for example). Responses from the SLC500s to the half-duplex master contain the destination address of the KF3 (01), which then returns all responses to the half-duplex master station upon being polled.

42

Chapter 4

Communicating with the KF3

HalfDuplex DF1 Protocol  Remote Mode

The valid range of slave addresses on a half-duplex network is 000-376 octal – a total of 255 stations. The valid range of addresses on a DH-485 network is 00-31 decimal. In order to make these two systems compatible, two special submenu configuration options have been included in the KF3 (see Table 3.C).

The first, submenu option 6, must be set to the address of the half-duplex master. This value is limited by the KF3 to a range of 00 to 77 octal (out of a possible range of 000-376 octal). The default address is 10 octal.

The second configuration option, submenu option 7, must be set to the group number. Group numbers range form 00 to 07, with each group consisting of up to 32 DH-485 nodes. The KF3 uses group numbers to create unique half-duplex DF1 addresses for each node on the DH-485 network.

In remote mode, the KF3 appears transparent to the half-duplex master, so that remote SLC 500s can be polled directly as individual slaves on the half-duplex network. The KF3 responds to the half-duplex master if the station address specified corresponds to the node address of any master (token-passing) station on the DH-485 network.

Messages from remote nodes on the DH-485 network (such as the SLC 500s) use the destination address of the KF3. To maintain its transparency to the half-duplex master, the KF3 overwrites this destination address with the value configured in submenu option 6. The message received by the half-duplex master will contain a source address equal to the station address specified in the poll packet and a destination address equal to the address of the half-duplex master device.

Table 4.A provides the address conversion using the group number. Remember that half-duplex DF1 (group) addresses are in octal and DH-485 node addresses are in decimal.

43

Chapter 4

Address

Communicating with the KF3

Table 4.A HalfDuplex

DH485 Node Address (Decimal)

00 000 040 100 140 200 240 300 340

01 001 041 101 141 201 241 301 341

02 002 042 102 142 202 242 302 342

03 003 043 103 143 203 243 303 343

04 004 044 104 144 204 244 304 344

05 005 045 105 145 205 245 305 345

06 006 046 106 146 206 246 306 346

07 007 047 107 147 207 247 307 347

08 010 050 110 150 210 250 310 350

09 011 051 111 151 211 251 311 351

10 012 052 112 152 212 252 312 352

11 013 053 11 3 153 213 253 313 353

12 014 054 114 154 214 254 314 354

13 015 055 115 155 215 255 315 355

14 016 056 116 156 216 256 316 356

15 017 057 117 157 217 257 317 357

16 020 060 120 160 220 260 320 360

17 021 061 121 161 221 261 321 361

18 022 062 122 162 222 262 322 362

19 023 063 123 163 223 263 323 363

20 024 064 124 164 224 264 324 364

21 025 065 125 165 225 265 325 365

22 026 066 126 166 226 266 326 366

23 027 067 127 167 227 267 327 367

24 030 070 130 170 230 270 330 370

25 031 071 131 171 231 271 331 371

26 032 072 132 172 232 272 332 372

27 033 073 133 173 233 273 333 373

28 034 074 134 174 234 274 334 374

29 035 075 135 175 235 275 335 375

30 036 076 136 176 236 276 336 376

31 037 077 137 177 237 277 337 Illegal

Group 00

Group 01 Group 02 Group 03 Group 04 Group 05 Group 06 Group 07

Remote Address Conversion T

HalfDuplex DF1 Address (Octal)

able

44

Chapter 4

Communicating with the KF3

Example: Remote Mode Addressing on a Multidrop Network

This example uses the 1771-KGM as the half-duplex master in a multidrop configuration. Each of the KF3s is set to half-duplex remote mode, and has the half-duplex Master Address set to the address of the 1771-KGM (010).

Figure 4.2

Mode Addressing

Remote

PLC2/

1771KGM

010

Key:

GROUP 00

KF3 001 (01)

SLC 500

005 (05)

DH485

SLC 500

002 (02)

SLC 500

011 (09)

XXX = Address on RS232 Multidrop (octal) (XX) = Address on local DH485 network (decimal)

DH485

Modem

ModemModem

Multidrop Network

GROUP 01

KF3 040 (00)

SLC 500

041 (01)

SLC 500

042 (02)

DH485

Modem

GROUP 02

KF3 101 (01)

SLC

500

100

(00)

SLC 500

102

(02)

SLC 500

103

(03)

SLC 500

104

(04)

45

Chapter 4

Communicating with the KF3

The group number is used by the KF3 to create a unique half-duplex DF1 address for each node on the DH-485 networks. The nodes’ addresses would be as follows:

Communicating with DH485 Master Devices

Table 4.B Multidrop

Group Number Device Address on DH485 Address on DF1

00 1770KF3

01 1770KF3

02 SLC 500

Addresses

SLC 500 SLC 500 SLC 500

SLC 500 SLC 500

1770KF3 SLC 500 SLC 500 SLC 500

01 02 05 09

00 01 02

00 01 02 03 04

HalfDuplex

001 002 005 011

040 041 042

100 101 102 103 104

The KF3 operates as a token-passing master on the DH-485 network. It can communicate with other DH-485 master stations (such as the SLC 500 series of programmable controllers) and with DH-485 slave devices.

Communicating with DH485 Slave Devices

46

The KF3 communicates with other master stations using the Allen-Bradley programmable controller command set. A detailed description of this command set is found in the Data Highway/Data Highway Plus/DH-485 Protocol and Command Set Manual.

The DH-485 network also supports slave (nontoken-passing) devices. The KF3 communicates with slaves using a special PLC command (CMD) byte.

Application programs communicate with slaves via SRD (Send and Receive Data) messages on DH-485. The SRD message is a link layer service provided on DH-485. The Programmable Controller Command Set has been extended to provide SRD messages by setting the PCCC CMD byte to 09.

The following section on packet formats is advanced information, not required for common applications.

Chapter 4

Communicating with the KF3

Slave Packet Formats

To invoke DH-485 link layer services, a special PCCC CMD byte is used to support the addition of link-specific information to the packet. Setting the CMD byte = 09 indicates that the packet contains extended link information.

When the CMD byte = 09, the packet contains a “Link Type” field (one byte), a “Link Status” field (one byte), and information specific to the link-type command being sent.

Figure 4.3 shows the SRD request packet format.

Figure 4.3

SRD Request Packet Format

The

DLE STX DST SRC CMD09LINK

TYPE

Link Type (LTYP)

This one-byte field defines the Link Type as follows:

1 – SRD Link Request 2-255 – Reserved for future expansion

Link STS (LSTS)

This one-byte field indicates the Link Status of the SRD request. It is used on replies to SRD requests only. When sending an SRD command, this field should be set to zero.

00 Success. The message was successfully sent to the destination

device. Note that some slaves will return data with the success code (ACK with Data).

01 NAK, No Memory at Destination (SRD reply). This link error

is returned when the KF3 receives a NAK, No Memory message from the destination station in response to an SRD request.

LSTS LINK PACKET

INFORMATION

DATA... DLE ETX BCC/CRC

02 NAK, Undeliverable Message (SRD reply). This link error

is returned if the 1770-KF3 was unable to send the SRD to the destination station (as may occur when the destination does not exist on the network).

47

Chapter 4

Communicating with the KF3

03 NAK, Bad LSAP (SRD reply). This link error is returned when

the KF3 receives a NAK, Bad LSAP message from the destination station in response to an SRD request. This indicates that the LSAP you are trying to send the SRD request to is invalid for that destination device.

04 NAK, Unimplemented Function (SRD reply). This link error is

returned when the KF3 receives a NAK, Unimplemented Function message from the destination station in response to an SRD request. The most likely cause is invalid data being sent to the destination device.

05 Invalid or Unsupported Link Type. This link error is returned

if the link type specified does not exist, or the destination of the message is the KF3 and it does not know how to interpret it. The KF3 currently recognizes only 01 as a valid link type. Any other value for the link type will produce this link error.

Link Packet Information

This field contains information specific to the link request. In the case of an SRD request, this field will contain the Destination Link Service Access Point (DLSAP) of the SRD.

Command Format, SRD Request

The format of an SRD request command is shown in Figure 4.4:

the CMD byte must be set to 09H

the Link Type byte must be set to 01

the Link Status byte must be set to 00

the Link Packet Information must contain the DLSAP for the slave

station

The format of the data is completely dependent on how the destination device was implemented. Refer to the destination device’s user manual for this information.

48

Figure 4.4 Command

DLE STX DST SRC CMD09LINK TYPE

Packet Format for an SRD Request

LSTS 00

DATA... DLE ETX BCC/CRCDLSAP

Chapter 4

Communicating with the KF3

Reply Format, SRD Request

The format of a reply to an SRD request is shown in Figure 4.5:

the CMD byte will have the reply bit set

the link type will be set to SRD Request

the link status will indicate success or failure

the LSAP of the slave device (SLSAP) will be included

if the request was successful, the data will be included. Note that

some devices may not return data. The format of data is completely dependent on how the destination device was implemented. Refer to the destination device’s user manual for this information.

DLE STX DST SRC CMD49LINK TYPE

Communicating with a Modem

Figure 4.5

Reply Packet Format

SRD

LSTS DATA... DLE ETX BCC/CRCSLSAP

The handshaking option must be enabled for the KF3 to properly control a modem.

The KF3 module continually asserts DTR when it is waiting for a call.

Under this condition, the modem will answer a call and assert DSR as soon as it detects ringing. The KF3 does not monitor the ring indicator in the RS-232C interface. Once it detects DSR, the module starts a timer (approximately 10 seconds) and waits for the DCD signal. When the module detects DCD, communication can start.

If the KF3 does not detect DCD within the 10-second timeout, the module turns DTR off. This causes the modem to hang up and break the connection. When the hang-up is complete, the modem turns off DSR. This causes the module to reassert the DTR line and wait for another call. This feature protects access to the phone if someone calling a wrong number reaches this node.

After detecting DCD, the KF3 continues to monitor the DCD line. If DCD goes off, the module restarts the 10-second timeout. If DCD is not restored within the timeout, the module initiates the hang-up sequence. This feature allows the remote node to redial in the event that the connection is lost through a fault in the phone network.

49

Chapter 4

Communicating with the KF3

This handshaking is necessary to guarantee access to the phone line. If the handshaking protocol is defeated by improper selection of modem options or by jumpers at the connectors, the modem may still answer a call. But if the connection is lost, the modem will not hang up. It will then be impossible for the remote node to reestablish the connection because it will get a busy signal.

410

Troubleshooting the KF3

Chapter

Interpreting the Front Panel LEDs

There are four LEDs on the front panel of the KF3. These indicators can help you in diagnosing problems with the module’s installation and operation.

Table 5.A

LED Indicators

LED Indicator

Power This indicator is lit (green) when the module is plugged in and turned on.

Fault This indicator goes on solid red if a hardware fault is detected on power

RS232C Activity This indicator flickers green when data is received by the module from

DH485 Activity Shows activity on the DH485 network. It turns on (green) while the KF3

Description

up, or during operation. If this occurs, the type of fault is displayed on the left numeric display on the bottom of the module. Refer to the section on Interpreting the Numeric Displays" on page 52 for information on fault codes.

This indicator will flash red at 1second intervals when a station with the same address as this node is detected. To correct the fault, go into configuration mode and change the address of one of the stations to an unused one.

the host computer. The more activity on the RS232C link, the faster this indicator will flash. At times of high activity, the indicator may flash so rapidly that it appears to be solid green.

has the token, and turns off when another station on the network has the token. It will flash slower as more stations are added to the network, since this node will have the token less frequently. It will also slow down if other nodes on the network are transmitting large data packets.

51

Chapter 5

Troubleshooting the KF3

Interpreting the Numeric Displays

The numeric displays are used to indicate hardware fault conditions. When the front panel fault indicator is lit, the left display will show a number indicating the type of hardware fault. Table 5.B gives a description of the faults.

Table 5.B Hardware

This number: Indicates this fault:

Faults

Processor Fault. A hardware fault was detected in the processor. This is a major fault requiring the module to be returned for servicing.

EPROM fault. The checksum stored in the EPROM does not match the actual checksum for the EPROM. This indicates bad cells in the EPROM. This is a major fault requiring the module to be returned for servicing.

RAM Fault. The static RAM cannot be reliably written to. This is a major fault requiring the module to be returned for servicing.

Stuck Button Detected. One or more of the push buttons are stuck on. This could be caused by a mechanical problem with the buttons, or by some object pressing on the push buttons. If the cause is mechanical, the module should be returned for servicing. Otherwise, remove the pressure from the push buttons. This should clear the fault condition. The KF3 will continue to communicate when this fault is detected, but configuration will not be possible.

EPROM Write Fault. The Flash EPROM could not be burned correctly during download of new firmware. This is a major fault requiring the module to be returned for servicing.

EEPROM Major Fault. The KF3 was unable to write the new configuration to the EEPROM. This is a major fault requiring the module to be returned for servicing.

EEPROM Minor Fault. On power up, the KF3 detected invalid configuration data in the EEPROM. The KF3 was able to recover by writing the factory default configuration to the EEPROM. You must power the module off and back on, and then reconfigure it. This is not a major fault, but if the problem persists, the module should be returned for servicing.

Power Failure. The power supply voltage is below the minimum rating for the KF3.

52

If your displays show meaningless symbols at startup, or if any values other than the above are displayed, your module is malfunctioning. Contact your A-B representative.

Chapter 5

Troubleshooting the KF3

Once you initiate active communication on the DF1 link, the RS-232 Activity LED will light up. If this fails to happen, check your RS-232C parameters (Table 3.B, Parameters 3-8).

If you are unable to save new configurations successfully, the left display will display hardware fault 6, and the Fault LED on the front will light up. This indicates a malfunction in the module. Contact your A-B representative.

53

RS232C Interface

Appendix

Specifications

Start bits 1

Data bits 8

Parity None, Even

Stop bits 1

Baud rates 300, 600, 1200, 2400, 4800, 9600, 19200

Connector DB25P (male)

Output RS232C

DH485 Interface

Electrical

Start bits 1

Data bits 8

Parity Even

Stop bits 1

Baud rates 300, 1200, 2400, 4800, 9600, 19200

KF3 connector 6pin, Phoenix MSTBA1.5/6GAU

Cable connector 6pin, Phoenix MSTB2.5/6STAU

Output RS485

AC input voltage 85132 VAC (RMS)

170264 VAC (RMS)

AC input frequency 4763 Hz

Fuse UL 198G and CSA C22.2, No. 59 rated,

5 mm x 20 mm, 0.1 Amp, 250V, fastacting

Connector IEC 320 power inlet

Power consumption 5 watts maximum

A1

Appendix A

Specifications

Physical

Environmental

Dimensions 9.5" (24.1 cm) wide x 7.1" (18.0 cm) long x 2.4" (6.1 cm) high

Weight 2 lbs. (.9 kg) approx.

Operating temperature

Storage temperature

Operating humidity 5% to 95% (noncondensing)

Safety requirements UL 1950

Electromagnetic interference FCC Part 15, Subpart J, Class A

0°C to 60°C (32°F to 165°F) 40°C to 85°C (40°F to 210°F)

DOC R.I.R. SEP. 1988

A2

Appendix

Diagnostic Command Support

The KF3 will interpret and respond to the following diagnostic commands:

Table B.A

Diagnostic Commands

KF3

Description Command Byte Function Code (hex)

Diagnostic Loop 06 00

Diagnostic Read Counters 06 01

Diagnostic Status 06 03

Diagnostic Loop

Reset Diagnostic Counters 06 07

Read Link Parameters 06 09

Set Link Parameters 06 0A

You can use this command to check the integrity of the transmissions over the communication link. The command message transmits up to 243 bytes of data to a node interface module. The receiving module should reply to this command by transmitting the same data back to the originating node.

Figure B.1 Diagnostic

CMD 06

Figure B.2 Diagnostic

Loop Command Format

byte

Loop Reply Format

1 byte

STS TNS FNC

2 bytes

1 byte

243 bytes max

DATA

CMD 46

byte

1 byte

STS TNS DATA

2 bytes

243 bytes max

B1

Appendix B

Diagnostic Command Support

Diagnostic Read

This command reads the diagnostic counters from the KF3. The format of these counters is given below. Note that the address and size fields can have any value (but they must be included).

Figure B.3 Diagnostic

CMD 06

Figure B.4 Diagnostic

CMD 46

Read Command Format

byte

1 byte

STS TNS FNC

Read Reply Format

byte

1 byte

STS TNS DATA

2 bytes

1 byte

2 bytes

ADDR 0000

1 byte

SIZE 00

52 bytes

B2

Appendix B

Diagnostic Command Support

Table B.B contains the diagnostic read reply values for the KF3:

Table B.B Diagnostic

Byte Description

0 Total DH485 packets received, low byte

1 Total DH485 packets received, high byte

2 Total DH485 packets transmitted, low byte

3 Total DH485 packets transmitted, high byte

4 Number of DH485 retries

5 Number of DH485 packets where the retry limit was exceeded

6 Number of DH485 NAK, No Memory sent

7 Number of DH485 NAK, No Memory received

8 Number of DH485 bad messages received

9 Number of DH485 line errors

10 Total RS232C packets received, low byte

11 Total RS232C packets received, high byte

12 Total RS232C packets transmitted, low byte

13 Total RS232C packets transmitted, high byte

14 Number of RS232C retries

15 Number of RS232C packets where the retry limit was exceeded

16 Number of RS232C NAKs sent

17 Number of RS232C NAKs received

18 Number of RS232C bad messages received

19 Number of RS232C line errors

2051 DH485 Active Node Table*

Read Reply V

alues

* The Active Node Table indicates what stations (nodes) are on the

network. The station address is used as an offset into the table. If a node number is not occupied, the node table will show FF. An active node shows the number of its successor, i.e., the number of the station to which it will pass the token. Slave devices do not appear.

B3

Appendix B

Diagnostic Command Support

Example of an Active Node Table

A network consists of 5 stations, numbered 0, 3, 4, 5, and 7. The Active Node Table would look like this:

Diagnostic Status

This command requests a block of status information from a DH-485 device. The reply contains the information in its DATA field. The status information varies from device to device. The KF3’s status block is given below.

Figure B.5 Diagnostic

Status Command Format

B4

byte

CMD 06

Figure B.6 Diagnostic

byte

CMD 46

1 byte

STS TNS FNC

2 bytes

Status Reply Format

1 byte

STS TNS DATA

2 bytes

1 byte

24 bytes

Appendix B

Diagnostic Command Support

Table B.C Diagnostic

Byte Description Status Reply (hex)

1 Mode/Status byte 00 (No Modes)

2 Interface/Processor Type

3 Extended Interface Type 2C

4 Not Used

5 Series/Revision

616 Bulletin Name = (ASCII) 1770KF3"

1724 Productspecific Information 0

Status Reply for KF3

Bits 03: Interface type (E = Extended)

Bits 47: Processor type (F = Computer)

Bits 04:

Bits 57:

0 = Revision A 1 = Revision B, etc.

0 = Series A 1 = Series B, etc.

Diagnostic Counter Reset

This command resets the diagnostic counters in the node interface module.

Figure B.7 Diagnostic

CMD 06

Figure B.8 Diagnostic

CMD 46

Counter Reset Command Format

byte

1 byte

STS TNS FNC

Counter Reset Reply Format

byte

1 byte

STS TNS

2 bytes

1 byte

B5

Appendix B

Diagnostic Command Support

Read

Link Parameters

Set Link Parameters

This command reads the link parameters defined for the KF3. Currently there is only one link parameter: Maximum Token Holder Address. This command returns the value for this parameter in the DATA byte.

Figure B.9 Read

Link Parameters Command Format

CMD 06

byte

1 byte

STS TNS FNC

2 bytes

1 byte

2 bytes

PARAMETER 0000

1 byte

SIZE 01

Figure B.10

Link Parameters Reply Format

Read

1 byte 1 byte

CMD 46

STS TNS DATA

2 bytes

1 byte

byte

This command sets the link parameters defined for the KF3 and saves them in EEPROM. Currently there is only one link parameter: Maximum Token Holder Address. This command sets the maximum token holder address in the KF3. Note that this command will override the value set when the module was configured.

B6

Figure B.11

Link Parameters Command Format

Set

CMD 06

byte

1 byte

STS TNS FNC

2 bytes

Figure B.12

Link Parameters Reply Format

Set

byte

CMD 46

1 byte

STS TNS

1 byte

2 bytes

PARAMETER 0000

SIZE 01

1 byte

DATA

Index

Numbers

115V operation, 213

1747C11 cable, 24

1771KGM, 41, 45

230V operation, 214

active node table, B3, B4

address conversion, 44

advanced communication parameters, 37

back panel, 21

basic communication parameters, 35

baud rates, A1

buttons, 31, 32

cable

constructing, 22 length, 12

cable connector, A1

cabling considerations

DH485, 22 modem, 212 RS232C, 28

chassis ground, 28, 29

clear to send (CTS), 28

command format

diagnostic counter reset, B5 diagnostic loop, B1 diagnostic read, B2 diagnostic status, B4 read link parameters, B6 set link parameters, B6 SRD request, 48

command set, 46

communicating with a modem, 49

communication driver, 41

communication parameters, 31, 32

advanced, 37 basic, 35

configuration display and push buttons,

31, 32

configuration mode, 31

configuring the KF3, 31, 33

connection

between a KF3 and a modem, 212 between two intermediate nodes, 26 for first segment of a multidrop network,

26

for the last segment of a multidrop

network, 27

to IBM computer with handshake signals

25 pin, 211 9 pin, 211

connectors, 21

constructing cables, 22

CTS, 28

CTS to transmit delay, 39

current setting, 32, 33, 35

data button, 32

data carrier detect (DCD), 28, 49

data rate, 12

data set ready (DSR), 28, 49

data terminal ready (DTR), 28, 49

DCD, 28, 49

default settings, 31, 35, 37, 43

destination address, 41, 42, 43

DF1 ACK timeout, 38

DF1 communication, 41

DF1 device category, 36

DF1 protocol, 11, 12, 41

DH485, 12, 21, 22, 41

activity indicator (LED), 310, 51, 52 baud rate, 35 cabling considerations, 22 Communication Interface, 11 master devices, 46 network, P1 node address, 35 slave devices, 46

DH485 specifications, A1

diagnostic commands, 35, B1

I–2

Index

diagnostic counter reset, B5

command format, B5 reply format, B5

diagnostic loop, B1

command format, B1 reply format, B1

diagnostic read, B2

command format, B2 reply format, B2 reply values, B3

diagnostic status, B4

command format, B4 reply, B5 reply format, B4

dimensions, A2

displays, 31

DSR, 28, 49

DTR, 28, 49

duplicate message, 36

electrical specifications, A1

electromagnetic interference, A2

embedded responses, 41

end nodes, 23, 24

end of message, 39

environmental specifications, A2

error detection, 12, 36

exit, without saving, 34

exit button, 32

group number, 39

group numbers, 43

halfduplex, 12, 41

master, 42, 43

halfduplex DF1, 39

halfduplex master, station address, 39

handshake signals, 211

handshaking, 39, 49

hardware fault, 34

host computer, 25, 41

humidity, A2

input frequency, A1

input voltage, A1

installation procedures, 21

installing the DH485 cable, 27

interface connections, 21

intermediate nodes, 22

jumper connections, 23

jumper positions

for DSR and CTS lines

25 pin, 210 9 pin, 210

for end nodes, 23

jumpers, 22

factory defaults, 34, 3537, 38310

fault, 52

fault indicator (LED), 34, 310, 51,

52

features, 12

flow control, 36

fullduplex, 12, 41

fuse, 21, 214, A1

GND, 28

grounding, 22

KF3 connector, A1

LEDs, 51

link coupler, 24

link packet information, 48

link status field, 47

link STS (LSTS), 47

link type (LTYP), 47

Index

I–3

link type field, 47

local mode, 41, 42

main menu, 32

manual overview, P1

maximum cable length, 27, 29, 212

maximum token holder, 38

maximum token holder address, B6

modem, 12, 28, 39

cabling considerations, 212

modes of operation, 31

configuration mode, 31 run mode, 31

module, 11

multipoint configuration, 25

multidrop addresses, 46

new stations, 38

node address, 42, 43

number of retries, 38

numeric displays, 52

packet formats, 46

link information, 48 slave, 47

parameter number, 35

parity, A1

PCCC CMD byte, 46, 47

physical specifications, A2

pinouts, 22, 28

PLC command sets, 41

pointtopoint configuration, 24

pointtopoint link, 22

power consumption, A1

power cord, 213, 214

power indicator (LED), 51

power select switch, 213

protocol, 12, 28

publications, P1

push buttons, 31, 32

operation, 32

read link parameters, B6

command format, B6 reply format, B6

receive data (RXD), 28

Rockwell Automation 1770-KF3 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

Table of Contents

Preface

Interface Connections

Modem Cabling Considerations

Positioning the KF3

Configuration

Basic Communication Parameters

Advanced Communication Parameters

Verifying Your Configuration Parameters

Interpreting the Front Panel LEDs

Interpreting the Numeric Displays

Index