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Summary of Contents for Data-Linc Group DDAA1000/SRM
- Page 1 UIDE DDAA1000/SRM Discrete/Analog Wireless Multiplexer It is essential that all instructions contained in the User Guide are followed precisely to ensure proper operation of equipment.
- Page 2 This device must accept any interference received, including interference that may cause undesired operation. The device must be operated as supplied by Data-Linc Group. Any changes or modifications made to the device without the express written approval of Data-Linc Group may void the user’s authority to operate the device.
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Page 3: Table Of Contents
DDAA1000/SRM User Guide Table of Contents Page Introduction Discrete Operation Analog Operation Changing System or Radio Configurations Technical Specifications Troubleshooting Technical Support Return Material Authorization Contact Information Appendix A Enclosure Dimensions Appendix B System Configuration Appendix C Radio Configuration Main Menu Option (0): Set Operation Mode... - Page 4 DDAA1000/SRM User Guide PN 161-09981-002C DATA-LINC GROUP rev 8/04...
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Page 5: Introduction
PC. Two version of the product exist. The DDAA1000/SRM has both analog and discreet inputs and outputs. The DD1000/SRM has only the discrete inputs and outputs. Discrete (digital) connections and operations are the same for both of the models. - Page 6 DDAA1000/SRM User Guide Table 1: LED Description i r r s t i s i l i l o l l i a l f t i n . t i t t i . t i d i l...
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Page 7: Discrete Operation
DDAA1000/SRM User Guide Discrete Operation Requirements 1. The outputs of the units cannot directly drive a relay. The digital outputs are open collector current sinking to the common ground. An external power supply must be used to provide DC power to any relays. - Page 8 DDAA1000/SRM User Guide Point-to-Point Discrete Operation The following illustrates an example of a point-to-point discrete system. The “Contact Closure Input” may be as simple as a bare wire or be connected to an output of an I/O module. This is an example of turning a lamp at the Master unit by closing a contact at the Remote unit using a discrete output.
- Page 9 DDAA1000/SRM User Guide Point-to-Multipoint Discrete Operation A multipoint system will involve two or more remote locations, which may be transmitting contact input information, providing discrete outputs or both. The following is an example of a multipoint configuration. In this example, the Master is transmitting a contact closure input to both Remotes. Note that input #1 on the Master will trigger the same numbered output on all Remote units at the same time.
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Page 10: Analog Operation
These units are bi-directional, they send and receive analog information both directions. The following is a common example of analog use for the DDAA1000/SRM units. Again, the Master’s input corresponds to the same numbered output on the Remote and vice versa. The 8 Master inputs match the 8 Remote outputs and the 8 Remote inputs match the 8 Master outputs. - Page 11 DDAA1000/SRM User Guide Figure 7: Connection of a flow meter to the DDAA1000/SRM unit Master or Remote 4-20mA Output 4-20mA Input 2 3 4 2 3 4 4-20mA Out In from Sensor Flow Meter PN 161-09981-002C DATA-LINC GROUP rev 8/04...
- Page 12 Alterations to this configuration are possible using an accessory cable and jumpers and software provided by Data-Linc Group. Reconfiguring the units requires the removal of the cover and uses a custom serial data cable connected to a computer. The reconfiguration of the Master and...
- Page 13 DDAA1000/SRM User Guide Point-to-Multipoint Analog Operation A system is to be built where one analog input exist at one remote and one at another. The maximum possibility of master outputs is eight, so this is a valid configuration. Remote 0 being the first remote in the Master’s poll list will be assigned Master output one.
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Page 14: Changing System Or Radio Configurations
Changing System or Radio Configurations To access the system or radio setups the user must remove all connectors from the DDAA1000/SRM or DD1000/SRM, then remove the cover and change the jumpers at location P1 and P2, and add a serial data cable (SRM6200E-SLC), supplied by Data-Linc Group, to connector P3. -
Page 15: Technical Specifications
Channels DD1000/SRM has 8 discrete inputs and 8 discrete outputs. DDAA1000/SRM has 8 discrete inputs, 8 discrete outputs, 8 analog inputs and 8 analog outputs. Channel Specifications Analog: 2% accuracy or better with a maximum output load of 300 ohms. -
Page 16: Troubleshooting
Note that Data-Linc Group unit does not supply loop power. My analog output is 0 or below 4 mA. Contact Data-Linc Group. The analog output has failed. This is a hardware problem. The discrete output will not activate my relay. -
Page 17: Technical Support
Data-Linc Group warrants equipment of its own manufacture to be free from defects in material and workmanship for one year from date of shipment to original user. Data-Linc Group will replace or repair, at our option, any part found to be defective. -
Page 18: Appendix A Enclosure Dimensions
DDAA1000/SRM User Guide Appendix A Enclosure Dimensions 6.85 5.655 CONTACT CLOSURE OUTPUT CONTACT CLOSURE INPUT STATUS 4.80 4.065 3.935 POWER 3.18 approx DATA-LINC GROUP (425) 882-2206 DDAA1000/SRM/M 4 - 20mA INPUT 4 - 20mA OUTPUT Ø 0.19 6.35 SIDE 1.65 1.725... -
Page 19: Appendix B System Configuration
Data-Linc Group Technical Support personnel. If the utility program is missing, it is possible to change the setting using a PC with a terminal program, but Data-Linc Group help must be used as the system setting can be confusing. An internal knowledge of the microprocessor operation is vital to understand how to set the system memory. - Page 20 DDAA1000/SRM User Guide If you have the Data-Linc Group PC program DDAAEEprom.exe it is designed to run in Windows. Load the program DDAAEEprom.exe into your PC. Start the program. When the system layout window appears fill in the following information: 1.
- Page 21 When done, click on the EXIT button at the lower right corner of the window. If you lost the program DDAAEEprom.exe either contact Data-Linc Group service for a new copy or you can use a terminal program such as “Hyper-terminal” with port settings of 9600 baud, 8 data bits, no parity and one stop bit. This process requires a very good understanding of how the units work internally or help from Data-Linc Group Technical Support.
- Page 22 7 above. 10. The display now prints out a status of your entries. Write these down and keep for use when you call Data-Linc Group technical support. Note the first line may say Master or Slave/Remote. Review the settings. The EEprom has been changed.
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Page 23: Appendix C Radio Configuration
To access the radio setups the user must remove all connectors from the DDAA/DD1000, the remove the cover, and change a set of jumpers at location P1 and P2 and add a serial data cable supplied by Data-Linc Group to connector P3. See Figure 10, PCB layout drawing (Appendix B). - Page 24 DDAA1000/SRM User Guide When the setup program the main menu will appear on the screen. The main menu also displays the radios unique ID number and firmware version. The user selects the parameter group by pressing a single key. The next level menu is then displayed.
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Page 25: Main Menu Option (0): Set Operation Mode
When item (0) is selected, the Operation Mode Menu appears as shown in figure 12. The Operation Mode option is used to designate the method in which the particular DDAA1000/SRM will be used. The DDAA1000/SRM operates in a master to remote configuration;... - Page 26 If a repeater is need in the system do not use a DDAA1000/DD1000. If and extended range of non-line-of-sight situation exists, use the Data-Linc Group SRM6000 radio modem as a repeater. When designated as a repeater, a radio modem behaves as a pass-through link. All settings for the call book, baud rates, and radio transmission characteristics are disabled.
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Page 27: Main Menu Option (1): Set Baud Rate
DDAA1000/SRM User Guide Main Menu Option (1): Set Baud Rate When option (1) is selected you will be able to change the radio modem’s RS-232 baud rate. This is the communication rate between the radio modem and the instrument to which it is connected. It is important to note that this is independent of the baud rate for the other radio modem(s) in the communication loop. -
Page 28: Main Menu Option (2): Edit Call Book
Call Book for multi-point systems is explained later in this chapter. The Call Book is an innovative feature in the DDAA1000/SRM that offers both security and flexibility in use. The Call Book accomplishes this by allowing the user to determine with which other DDAA1000/SRMs a given radio modem will communicate, based on the Call Book numbers for both the master and remote. - Page 29 DDAA1000/SRM User Guide Entering or Modifying Numbers in the Call Book Entering or modifying call book numbers in the Call Book is a straightforward process. When in the Call Book menu, select the entry number (0 – 9) you wish to edit. You will be prompted for the new number (formatting is automatic, you do not need to enter the dash).
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Page 30: Main Menu Option (3): Edit Radio Transmission Characteristics
Selection (0) in the Radio Parameters menu allows the user to modify the hopping patterns of the radio modems to minimize the interference with other Data-Linc Group radios in operation in the area. For instance, if there were 10 pairs of Data-Linc Group radios in operation within a factory or refinery, changing the Frequency Key would ensure that they would not jump onto the same frequencies at the same time for the same length of time. - Page 31 DDAA1000/SRM User Guide Table 4: Minimum Packet Size Settings (bytes) Table 5: Maximum Packet Size Settings where RF Data Rate=3 Maximum Setting PN 161-09981-002C DATA-LINC GROUP rev 8/04...
- Page 32 (4) RF Data Rate The DDAA1000/SRM has two settings for the RF Data Rate (not to be confused with the RS232 Baud Rate). Setting 2 should be used when the radio modems are close together and data throughput is to be optimized. Setting 3 should be used when the radio modems are farther away and a solid data link is preferred over data throughput.
- Page 33 (6) Remote Security With option 6 the user may disable the radio modem’s security so it will accept a call from any other DDAA1000/SRM. The default setting is 0 where security is enforced (the caller’s call book number must be in the remote’s Call Book).
- Page 34 With a setting of 1, the rejection of interference is improved, at the cost of reduced range and/or throughput. (B) MCU speed Use this menu to set the speed of the MCU (processor) in the modem. Note: Only needed when the DDAA1000/SRM is set to 115.2K baud . But the DDAA1000/SRM is limited to 19.2K baud PN 161-09981-002C...
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Page 35: Main Menu Option (4): Show Radio Statistics
High noise levels can often be improved with bandpass filters, antenna placement or antenna polarization. Please contact Data-Linc Group for more information. Average Signal Level The average signal level indicates the level of received signal at this modem and at each of the modems used as repeaters in the link. - Page 36 Radio Temperature The radio temperature value is the current operating temperature of the radio in degrees C (Celsius.) For proper operation, DDAA1000/SRM radio modems must be in the range of –40 to 75 Multi-Point Operation In a multi-point system, a radio modem designated as a master is able to simultaneously be in communication with numerous remotes.
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Page 37: Main Menu Option (5): Edit Multi-Point Parameters
This parameter does need to be set for multi-point remotes. In point-to-point operation, the DDAA1000/SRM radio modems acknowledge every data packet transmitted. In a multi-point network, the remotes do not acknowledge transmissions from a master to the remotes. This is to prevent system overload. If the remotes acknowledged all data transmissions from the master in a large multi-point system, then all system capacity would be spent having the master listen for acknowledgments from the remotes. - Page 38 DDAA1000/SRM User Guide Another parameter in a multi-point network is (4) DTR Connect. When set at (1), the remote will connect to the master if it is free when the DTR line goes high on the 9-pin RS232 connector. In setting (2), the radio modem will accumulate data in its buffer and transmit in a burst when the buffer is full.
- Page 39 SubNet ID The DDAA1000/SRM series modems offer a SubNet ID system for use in multi-point networks using Network ID. This feature allows the users to dictate what path a given repeater or remote will use to achieve a link to the network master. For example, if a remote modem in a given network has line of sight to the network master and one or more repeaters, but only one repeater is close to that remote, SubNet ID can be used to link that master with the proper repeater only.
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Page 40: Main Menu Option (8): Password
DDAA1000/SRM User Guide To back out of the process and not enable the password, hit escape. To set a password, type in exactly 4 characters. At any point in the process you can cancel by hitting the escape key. Once the 4 characters have been entered, you will be prompted with “<enter>... -
Page 41: Modem Placement Locations
2 feet) will solve noise problems. In extreme cases, such as when the radio modem is located close to pager or cellular telephone transmission towers, Data-Linc Group offers a band pass filter to reduce the out of band noise.
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