Omron DDAA1000/SRM manual Main Menu Option 3 Edit Radio Transmission Characteristics, FreqKey

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DDAA1000/SRM User Guide

Main Menu Option (3): Edit Radio Transmission Characteristics

When option (3) is selected in the main menu the screen in figure 14 appears, which allows the user to modify the radio transmission characteristics of the radio modems. As stated in the warning, these parameters are for the experienced user who has a good understanding of the principles of radio data transmission. They should be changed only after consulting this user guide.

It is important to note that the radio parameters between any radio modems in communication will be determined by the settings for the master (except when in multi-point mode, see (4) RF Data Rate below). While the settings may be modified for the remote(s) and/or repeaters, they will be overridden by the master’s parameters.

Figure 14: Radio Parameters Menu

Shown below are example settings. Please refer to supplied configuration sheets for your modem’s configuration.

(0)FreqKey

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.

There are 15 choices available for the Frequency Key (0-9 and A-E). It is recommended that a list be maintained of the settings for each master to ensure that each is set to a different hopping pattern.

(1)Max Packet Size and (2) Min Packet Size Selections

For DDAA1000/DD1000 use the user should not change this parameter.

(1)and (2) allow the user to designate the size of the packets (in bytes) used by the radio modem in its communication link. Packet size is determined by a combination of the settings entered by the user and the RF Data Rate. In addition, the Max Packet Size is a function of the setting selected for the Min Packet Size. Tables 3, 4 and 5 provide the packet sizes for each different combination of settings.

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DATA-LINC GROUP

PN 161-09981-002C

rev 8/04

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Contents DDAA1000/SRM FCC Notification Product User GuideTable of Contents DATA-LINC Group Introduction DDAA1000 and DD1000Power Connector Antenna Connectoin TypeTeminal Block Discrete Operation ConnectionsPoint-to-Point Discrete Operation Master RemotePoint-to-Multipoint Discrete Operation MasterPoint-to-Point Analog System Supply loop powerAnalog Operation Needed. The DDAA1000 unites do notConnection of a flow meter to the DDAA1000/SRM unit Master or RemoteFactory Configuration Process Point-to-Multipoint Analog SystemPoint-to-Multipoint Analog Operation Point-to-Multipoint Analog Example RemoteChanging System or Radio Configurations Layout DrawingTechnical Specifications Troubleshooting Technical Support Product WarrantyReturn Material Authorization Contact InformationAppendix a TOPDDAA1000 DD1000 Configuration Appendix BDATA-LINC Group Ddaa Eeprom MENU** *SET Caplck DATA-LINC Group Appendix C Radio Configuration Terminal SettingsMain Menu Point-to-Point Remote Main Menu Option 0 Set Operation ModePoint-to-point Master Point-to-Multi-Point MasterPoint-to-Point Repeater Point-to-Point Remote/Master SwitchableDDAA1000/SRM User Guide Point-to-Point Remote/Repeater Point-to-Multi-Point RepeaterMain Menu Option 1 Set Baud Rate Available data word length and parity selectionsModBus RTU Main Menu Option 2 Edit Call Book Call Book MenuEdit Call Book in Multi-Point Systems Entry Number Repeater 000-0000Main Menu Option 3 Edit Radio Transmission Characteristics FreqKeyMax Packet Size and 2 Min Packet Size Selections DDAA1000/SRM User Guide Minimum Packet Size Settings bytes Maximum Packet Size Settings where RF Data Rate=3Xmit Rate RF Data RateRemote Security DDAA1000/SRM User Guide RF Xmit PowerPower Transmit Settings RTS to CTSDDAA1000/SRM User Guide Lowpower Mode High NoiseMCU speed Average Noise Level Average Signal LevelMain Menu Option 4 Show Radio Statistics Overall Rcv Rate %Radio Temperature DDAA1000/SRM User Guide Number of DisconnectsMulti-Point Operation Main Menu Option 5 Edit Multi-Point Parameters Multi-Point ParametersSubNet ID DiagnosticsRemote/Repeater Radio IDMain Menu Option 8 Password Changing a Password Disabling PasswordDDAA1000/SRM and DD1000/SRM Placement Locations
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