INDUSTRIAL DATA COMMUNICATIONS USER GUIDE DLM4000 Dial-Up/Leased Line Modem It is essential that all instructions contained in the User Guide are followed precisely to ensure proper operation of equipment.
Product User Guide PN 161-09997-003A Feb 2005
DLM4000 User Guide Table of Contents Page Operation Instructions ○ ○ ○ Dia-Up Systems Example ○ ○ ○ ○ ○ ○ ○ ○ Lesased Line System Example LED Descriptions ○ ○ Connection Points ○ ○ ○ ○ Verifying Operation ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Registers ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Technical Specifications Troubleshooting ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
DLM4000 User Guide 2 PN 161-09997-003A Feb 2005
DLM4000 User Guide DLM4000 Operation Instructions The DLM4000 has some requirements, which need to be met for proper operation and communication. 1. The standard DLM4000 modem requires 9 VAC and the 24V version requires 24 VDC. 2. The minimal current requirement for this modem is 300 mA. 3. This modem uses a 10-bit word format only. Below is a table of reference to understand the data formats supported.
DLM4000 User Guide Connecting the DLM4000 The DLM4000 provides an RS232 port for the connection to other devices. Below is a diagram of the serial port configuration. It is important to use the proper cable when connecting equipment to the DLM4000. It is recommended that only Data-Linc Group cables be used to ensure optimal performance. Commercial serial cables will not always provide proper configuration. Should you require a cable(s), contact Data-Linc Group at (425) 882-2206 or email sales@data-linc.
DLM4000 User Guide DLM4000 Communications The DLM4000 operates with many asynchronous protocols, some of which are listed below. The DLM4000 also provides different options for connecting PLC’s and other equipment. Examples are provided on the following pages. Dial-up System Example Diagram 1 DLM4000 multipoint full duplex system using a PC master and PLC remotes. The system may involve dial-up polling or periodic retrieval of data from remote locations.
DLM4000 User Guide Communications Description Communication with the DLM4000 is possible in a multipoint configuration, but only through dial-up configuration. Per diagram 1, it is possible to setup a dial-up polling operation. The link is a full-duplex link, which can be set up to 19200 bps. Leased line mode is another option that can be used when dial-up lines are not available or desired, (see diagram 3). This link is strictly a point-to-point full-duplex link.
DLM4000 User Guide DLM4000 Connection Points ON OFF 9VAC PHONE OUT PHONE IN (PWR) The DLM4000 utilizes a toggle switch for powering the modem on and off. (9VAC) The power connection is made with a barrel connector, which comes on the supplied power supply. (RS232) The connection for the RS232 port on the modem is a DB25 female connection. Keep in mind that this device is considered a DCE. (PHONE OUT) For most applications a phone is not required.
DLM4000 User Guide Verifying Operation of the DLM4000 Leased Line and Dial-Up Modem Components Required for Dial-Up Verification 1. A desktop or laptop computer. 2. Two DLM4000 modems configured for dial-up operation. 3. A serial cable for connection to the computer. Refer to diagram below. 4. A paperclip or jumper wire for the serial port of the DLM4000. 5. A phone line simulator or preferably two direct dial-up lines. Components Required for Leased Line Verification 1. A desktop or laptop computer. 2.
DLM4000 User Guide Setting up the Equipment for Bench Test Verification DLM4000/DL Bench Test Dial-Up Phone Connection to Telco Network RS-232 Master Station DATA-LINC GROUP (425) 882-2206 DLM4000 C T Dial-Up Phone Connection to Telco Network DATA-LINC GROUP (425) 882-2206 DLM4000 C R T R DLM4000/LL Bench Test RS-232 Master Station DATA-LINC GROUP (425) 882-2206 DLM4000 C T R DATA-LINC GROUP (425) 882-2206 DLM4000 C T R After connecting the equipment in either of the above configuratio
DLM4000 User Guide Jumper Settings Note that HyperTerminal is required for connecting the dial-up DLM4000 modems to each other. Leased Line versions only need to be powered up and they will establish carrier between each other. The following steps will walk through launching and configuring HyperTerminal to talk to the DLM4000 modem. 1. Launching HyperTerminal Click on Start at the bottom of the computer desktop and a column of options should be displayed.
DLM4000 User Guide Type in an appropriate name for your connection. After you have typed a name, select OK. Another window is displayed requiring the entry of additional information about the configuration. In this next window, the entry of a phone number is ignored. At the bottom of the window is an option to “Connect using:” and there is an arrow. Select the arrow and more options will be displayed. Select the computer COM port that the DLM4000 is connected to. Now select OK.
DLM4000 User Guide Configuration Setup To enable AT command configuration of the DLM4000, the modem must be in command mode, which is the default mode for dial-up operation. To enable command mode, remove the modem cover and place J2 in positions 1-2. Positions 2-3 is leased-line mode. See diagram 1.
DLM4000 User Guide DLM4000 Command Descriptions AT: The attention command clears the command buffer must precede all command lines except A/ and +++. A/: This command re-executes the last command in the command buffer. +++: This is the escape sequence to take the modem from data mode to command mode. An: If n is not specified, answer incoming ring immediately. If n is specified, auto-answer after n rings where n is 1 to 255 B: The B command defines the communications protocol as follows.
DLM4000 User Guide S=n: Instructs the modem to dial a stored number previously saved with the &Z command. For example, ATDTS=2. This would dial a number stored in memory location 2. Sr?: Displays the contents of a particular S register. For example, ATS8?. This would display the value stored in register S8. Sr=n: Changes the value in a particular register. For example, ATS8=1. This could change the value in register S8 to 1. U3=n: Sets the transmit level in the modem from 0 to a –15dB.
DLM4000 User Guide &Fn: Restore modem Active Configuration Profile to factory default settings where: &F0: Restore FDP0 (error detection and data compression) &F1: Restore FDP1 (no error detection and data compression) &L: Leased or dial-up line selection. &L0: Sets the modem for dial-up line operation. &L1: Sets the modem for leased-line operation dedicated between two destinations. &R: Determines how the DLM4000 will react to CTS/RTS signals. &R0: CTS tracks the condition of RTS.
DLM4000 User Guide \Tn: Inactivity timer. Determines how many minutes the modem hangs up in, if no data is sent or received during a normal or reliable link. These link types must be used for this option to work. Range: 0 to 255 Unit: 1 Min. Default: 0 %Bn: Sets the maximum port baud rate. n= 300, 1200, 2400, 4800, 7200, 9600, 19200 %C: This command controls data compression. %C0: Data compression is disabled. %C1: Enables V.42bis and MNP Class 5 data compression.
DLM4000 User Guide DLM4000 Registers Sn?: This will allow viewing of the register value. Here is an example of how to read register S7. ATS7?. Sn=: This will allow modification of the register value. Here is an example of how to change register S7. ATS7=130. S0: This register determines the number of rings before the modem will answer a call. When S0 is set to 0 the modem will not auto-answer calls.
DLM4000 User Guide Configuring the Modem The modem requires the use of AT commands to enable dialing when power is applied. The following are the required commands. &A: Activates a designated location in memory where the phone number to be dialed is stored. String: &An Range: n=000 – 009 To activate location one in memory, the convention would be AT&A001&W. &Z: Stores a phone number to the designated active memory location set by &A. Note that both &Z and &A use the same number.
DLM4000 User Guide Technical Specifications Data Communication Standards CCITT V.32bis, V.32, V.22bis, V.22, V.23, V.21, Bell 103, Bell 212A Data Compression & Error Correction CITT V.42bis, V.
DLM4000 User Guide DLM4000 Troubleshooting When connecting modem to terminal emulation program, modem does not respond: 1. Ensure the modem is connected to the COM port that the terminal emulation program is using. 2. Check that the COM port is free and no other devices are using it such as an internal modem. 3. Make sure the cable connecting the modem to the PC is the correct cable. Refer to the cable requirements section of the manual. 4. Try re-starting the terminal emulation program. 5.
DLM4000 User Guide When communicating between two PLCs, I have a flashing T LED on the Master and a flashing R LED on the Remote. I never have a flashing R on the Master and T on the Remote. 1. The poll is getting to the remote PLC, but it is not answering back. Verify that the PLC addressing is correct. 2. If possible, try connecting the PLCs together with a null cable directly. If they do not work, most likely a PLC programming or processor issue exists. 3.
DLM4000 User Guide Technical Support Data-Linc Group maintains a fully trained staff of service personnel who are capable of providing complete product assistance. They can provide you with technical, application and troubleshooting, spare parts and warranty assistance. Our technical staff is based in Bellevue, Washington USA and may be reached at (425) 882-2206 or e-mail support@data-linc.
DLM4000 User Guide Appendix A Enclosure Dimensions 0.625 in 1.59 cm 0.375 in 0.953 cm 11.275 in 28.64 cm 3.63 in 9.22 cm 6.63 in 16.84 cm Ø 0.250 in 0.635 cm 6 Places 7.25 in 18.42 cm 3.00 in 7.62 cm 6.00 in 15.24 cm 3.00 in 7.62 cm 10.53 in 26.75 cm 10.00 in 25.40 cm 1.375 in 3.49 cm Note: Enclosure Size, Mounting Holes and Locations may change without notice, contact Data-Linc Group (425) 882-2206 for the latest Enclosure Dimensions.
DLM4000 User Guide Appendix B CCDF Module When Installed Description The CCDF module is designed to allow Data-Linc Group dial-up modems to make their connection when continuous RS232 data is flowing into its RS232 port. This device is designed for use with Data-Linc Group dial-up modems DLM4000/DL and DLM4100/DL. When a given modem is in dial-up mode it is also in command mode. Any data sent into the RS232 port while the modem is trying to dial will cause it to disconnect, thus the need for the CCDF.
DLM4000 User Guide Appendix C AADB (Auto Answer Dial-Back) When Installed The DLM4000-AA Dial-Up Modem is capable of dialing a stored telephone number when a logic high signal is sent to a terminal block connection at the rear of the modem. The modem will keep dialing until one of the following occurs: 1. A connection is made. 2. The Logic Flag is cleared(returned to logic low). 3. A second Logic High is presented at the override terminal.
