Rockwell-automation 1770-KF3 DH-485 Communication Interface User Manua User Manual

DH485Communication Interface(Cat. No. 1770KF3)User’s Manual

Installing the KF3Chapter 222Depending on your application, you can use the KF3 module tocommunicate with a single station via a point-to-point link,

Installing the KF3Chapter 223Table 2.AWire/Terminal Connections for Imtermediate NodesFor this Wire/Pair Connect this Wire To this TerminalShield/Dra

Installing the KF3Chapter 224Connecting via a DH485 Link (PointtoPoint Configuration)Figure 2.4 shows a point-to-point link consisting of a single

Installing the KF3Chapter 225Connecting to a DH485 Network (MultiPoint Configuration)Figure 2.6 shows a network consisting of three SLC 500 program

Installing the KF3Chapter 226Figure 2.7Connection for First Segment of a Multidrop NetworkJumper to groundshield connector1770KF3 on one end of the

Installing the KF3Chapter 227Figure 2.9Connection for Last Segment of a Multidrop NetworkThird nodeJumper toterminate nodeFourth node on the end of t

Installing the KF3Chapter 228Cabling for the RS-232C connector of the KF3 will vary depending onyour application. The pinouts for this connector are

Installing the KF3Chapter 229Use Belden #8723 (or equivalent) cable to construct a cable to connect theKF3 to a computer.Important: The length must n

Installing the KF3Chapter 2210If your computer requires active DSR and CTS signals, add jumpers to thecomputer connections as shown in Figures 2.13 a

Installing the KF3Chapter 2211If you are using handshake signals with your computer, use the connectionshown in Figure 2.15 or 2.16.Figure 2.15Connec

Because of the variety of uses for this product and because of the differences between solidstate products and electromechanical products, those respo

Installing the KF3Chapter 2212The KF3 is connected to a modem via a direct 25-pin-to-25-pin cable,which you must construct using Belden #8723 (or equ

Installing the KF3Chapter 2213 Auto-Answer: These modems have self-contained timeouts and tests,and can answer and hang up the phone automatically.T

Installing the KF3Chapter 2214230V OperationSet the power select switch to “230V” as shown in Figure 2.19.Figure 2.19Power Select Switch Set for 230V

Installing the KF3Chapter 2215Figure 2.20Replacing FusesFuseHolderCap Fuse Fuse Holder AssemblyFuseReceptacleScrewdriverThe KF3 is intended to sit on

Chapter 331Configuring the KF3You configure the KF3’s communication parameters using the push buttonsand displays located on the bottom of the module

Configuring the KF3Chapter 332DisplaysFigure 3.1 shows the configuration displays on the bottom of the module.The left display (one digit) shows the

Configuring the KF3Chapter 333Configuration StepsEntering Configuration Mode1. Press the View button to enter configuration mode. The firstparameter

Configuring the KF3Chapter 334Figure 3.2Successful Save DisplayIf the save is not successful, your KF3 is malfunctioning. The leftdisplay will show

Configuring the KF3Chapter 335For normal operation, the basic communication parameters must beconfigured. For special communication needs, configure

Configuring the KF3Chapter 336Table 3.BBasic Configuration Parameters (continued)Parameter Number Parameter Description Factory DefaultRS232C Parame

Manual Overview P1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Audience P1. . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring the KF3Chapter 337The advanced communication parameters are located in the Submenu.When parameter 9, the Submenu entry parameter, is show

Configuring the KF3Chapter 338Table 3.CSubmenu Configuration ParametersParameter Number Parameter Description Factory DefaultMaximum TokenHolderThe n

Configuring the KF3Chapter 339Table 3.CSubmenu Configuration ParametersParameter Number Parameter Description Factory DefaultCTS to Transmit Delay Th

Configuring the KF3Chapter 3310Before connecting the KF3 to your network, cycle through the parametersettings. If you have properly defined your net

Chapter 441Communicating with the KF3Read this chapter if you are configuring a half-duplex network or if youplan to write a communication driver. A

Communicating with the KF3Chapter 442HalfDuplex DF1 Protocol  Local ModeLocal mode requires an intelligent master device, capable of specifyingboth

Communicating with the KF3Chapter 443HalfDuplex DF1 Protocol  Remote ModeThe valid range of slave addresses on a half-duplex network is 000-376octa

Communicating with the KF3Chapter 444Table 4.AHalfDuplex Remote Address Conversion TableDH485 NodeAddressHalfDuplex DF1 Address (Octal)Address(Dec

Communicating with the KF3Chapter 445Example: Remote Mode Addressing on a Multidrop NetworkThis example uses the 1771-KGM as the half-duplex master i

Communicating with the KF3Chapter 446The group number is used by the KF3 to create a unique half-duplex DF1address for each node on the DH-485 networ

Table of ContentsiiSpecifications A1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RS232C Interface A1. . . . . . . . . .

Communicating with the KF3Chapter 447Slave Packet FormatsTo invoke DH-485 link layer services, a special PCCC CMD byte is usedto support the addition

Communicating with the KF3Chapter 44803 NAK, Bad LSAP (SRD reply). This link error is returned whenthe KF3 receives a NAK, Bad LSAP message from the

Communicating with the KF3Chapter 449Reply Format, SRD RequestThe format of a reply to an SRD request is shown in Figure 4.5: the CMD byte will have

Communicating with the KF3Chapter 4410This handshaking is necessary to guarantee access to the phone line. If thehandshaking protocol is defeated by

Chapter 551Troubleshooting the KF3There are four LEDs on the front panel of the KF3. These indicatorscan help you in diagnosing problems with the mo

Troubleshooting the KF3Chapter 552The numeric displays are used to indicate hardware fault conditions.When the front panel fault indicator is lit, th

Troubleshooting the KF3Chapter 553Once you initiate active communication on the DF1 link, the RS-232Activity LED will light up. If this fails to hap

AppendixAA1SpecificationsStart bits 1Data bits 8Parity None, EvenStop bits 1Baud rates 300, 600, 1200, 2400, 4800, 9600, 19200Connector DB25P (male)

SpecificationsAppendix AA2Dimensions 9.5" (24.1 cm) wide x 7.1" (18.0 cm) long x 2.4" (6.1 cm) highWeight 2 lbs. (.9 kg) approx.Operat

AppendixBB1Diagnostic Command SupportThe KF3 will interpret and respond to the following diagnostic commands:Table B.AKF3 Diagnostic CommandsDescript

PrefaceP-1This manual: describes the features and capabilities of the 1770-KF3 tells you how to install, configure, and operate your 1770-KF3 gives

Diagnostic Command SupportAppendix BB2This command reads the diagnostic counters from the KF3. The format ofthese counters is given below. Note tha

Diagnostic Command SupportAppendix BB3Table B.B contains the diagnostic read reply values for the KF3:Table B.BDiagnostic Read Reply ValuesByte Descr

Diagnostic Command SupportAppendix BB4Example of an Active Node TableA network consists of 5 stations, numbered 0, 3, 4, 5, and 7. The ActiveNode Ta

Diagnostic Command SupportAppendix BB5Table B.CDiagnostic Status Reply for KF3Byte Description Status Reply (hex)1 Mode/Status byte 00 (No Modes)2 In

Diagnostic Command SupportAppendix BB6This command reads the link parameters defined for the KF3. Currentlythere is only one link parameter: Maximum

Numbers115V operation, 2131747C11 cable, 241771KGM, 41, 45230V operation, 214Aactive node table, B3, B4address conversion, 4

IndexI–2diagnostic counter reset, B5command format, B5reply format, B5diagnostic loop, B1command format, B1reply format, B1diagnost

IndexI–3link type field, 47local mode, 41, 42Mmain menu, 32manual overview, P1maximum cable length, 27, 29, 212maximum token

IndexI–4submenu, 32, 37configuration parameters, 36, 38indicator, 37successful save display, 34Ttemperatureoperating, A2storage,

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1Chapter 11Product OverviewThe DH-485 Communication Interface module links host computers withthe Allen-Bradley RS-485 Data Highway (DH-485). The mo

Product OverviewChapter 112The DH-485 communication network allows devices on the plant floor toshare information. Via the network, application prog

Product OverviewChapter 113Table 1.AProtocol ApplicationsProtocol PointtoPoint MultiPointFullduplex Yes NoHalfduplex Yes NoA description of thes

2Chapter 21Installing the KF3To install the KF3, follow these steps:1. Define your network needs.2. Construct the necessary cables.3. Ground and term