Omron DDAA1000/SRM manual Main Menu Option 1 Set Baud Rate, ModBus RTU

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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. For example, DDAA1000/SRMs may be used in an application to send data from remote process instrumentation to an engineer’s computer. In this application, the baud rate for the radio modem on the instrumentation might be set to 9600, and the radio modem on the computer might be set to 57,600 or 115,200.

In general, it is desirable to set the baud rate to the highest level supported by the device to which it is connected. However, please note that this may actually result in slower data communications if the UART chipset of the connected device does not support higher data rates.

The DDAA/DD1000 use 8 Data Bits/ no Parity, 1 Stop bit only. Do not change. These settings are not used when setting radio operating values. The default setting is 0 (8,N,1).

Table 3: Available data word length and parity selections

	Menu	Data Bits	Parity	Stop Bits
	Setting	Data Bits	Parity	Stop Bits
	Setting

	0	8	None	1

	1	7	Even	1

	2	7	Odd	1

	3	8	None	2

	4	8	Even	1

	5	8	Odd	1

Note: The RF parameter baud rate must match the internal set baud rate in the EEprom. A mismatched baud rate will cause communication to alway stop.

ModBus RTU

Do not use this mode with the DDAA1000/DD1000.

PN 161-09981-002C

rev 8/04

DATA-LINC GROUP

25

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Contents DDAA1000/SRM Product User Guide FCC NotificationTable of Contents DATA-LINC Group DDAA1000 and DD1000 IntroductionPower Connector Antenna Connectoin TypeTeminal Block Connections Discrete OperationMaster Remote Point-to-Point Discrete OperationMaster Point-to-Multipoint Discrete OperationNeeded. The DDAA1000 unites do not Supply loop powerAnalog Operation Point-to-Point Analog SystemMaster or Remote Connection of a flow meter to the DDAA1000/SRM unitPoint-to-Multipoint Analog System Factory Configuration ProcessPoint-to-Multipoint Analog Example Remote Point-to-Multipoint Analog OperationLayout Drawing Changing System or Radio ConfigurationsTechnical Specifications Troubleshooting Contact Information Product WarrantyReturn Material Authorization Technical SupportTOP Appendix aAppendix B DDAA1000 DD1000 ConfigurationDATA-LINC Group Ddaa Eeprom MENU** *SET Caplck DATA-LINC Group Terminal Settings Appendix C Radio ConfigurationMain Menu Point-to-Multi-Point Master Main Menu Option 0 Set Operation ModePoint-to-point Master Point-to-Point RemotePoint-to-Multi-Point Repeater Point-to-Point Remote/Master SwitchableDDAA1000/SRM User Guide Point-to-Point Remote/Repeater Point-to-Point RepeaterMain Menu Option 1 Set Baud Rate Available data word length and parity selectionsModBus RTU Call Book Menu Main Menu Option 2 Edit Call BookEntry Number Repeater 000-0000 Edit Call Book in Multi-Point SystemsMain Menu Option 3 Edit Radio Transmission Characteristics FreqKeyMax Packet Size and 2 Min Packet Size Selections Maximum Packet Size Settings where RF Data Rate=3 DDAA1000/SRM User Guide Minimum Packet Size Settings bytesRF Data Rate Xmit RateRTS to CTS DDAA1000/SRM User Guide RF Xmit PowerPower Transmit Settings Remote SecurityDDAA1000/SRM User Guide Lowpower Mode High NoiseMCU speed Overall Rcv Rate % Average Signal LevelMain Menu Option 4 Show Radio Statistics Average Noise LevelRadio Temperature DDAA1000/SRM User Guide Number of DisconnectsMulti-Point Operation Multi-Point Parameters Main Menu Option 5 Edit Multi-Point ParametersRadio ID DiagnosticsRemote/Repeater SubNet IDMain Menu Option 8 Password Disabling Password Changing a PasswordDDAA1000/SRM and DD1000/SRM Placement Locations