Campbell Hausfeld SDM-SIO4 manual Sensors Which Send Data Out Without Prompting, Time stamp

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SDM-SIO4 User Guide

;get data from SDM-SIO4 and put into locations 1 and 2.

3:SDM-SIO4 (P113)

1:	1	Reps
2:	0	Address
3:	1	Send/Receive Port 1
4:	4	Command
5:	0	1st Parameters
6:	0	2nd Parameters
7:	2	Values per Rep
8:	1	Loc [ number	]
9:	1.0	Mult
10: 0.0		Offset

;At zero minutes into a 10 minute interval set the output ;so that the data from the sensor will be stored into ;final storage.

4:If time is (P92)

1:0 Minutes (Seconds --) into a

2:10 Interval (same units as above)

3:10 Set Output Flag High (Flag 0)

;Time stamp.

5:Real Time (P77)

1:1110 Year,Day,Hour/Minute

;Instantaneous sample form the sensor.

6:Sample (P70)

1:	2	Reps
2:	1	Loc [ number	]

;Average over the 10 minute interval.

7:Average (P71)

1:	2	Reps
2:	1	Loc [ number	]

*Table 2 Program

02:0.0000 Execution Interval (seconds)

*Table 3 Subroutines

End Program

5.3.2Sensors Which Send Data Out Without Prompting

It can be very difficult to acquire data from this type of sensor because of the lack of synchronisation with the datalogger program.

For sensors which output data relatively slowly data can be collected by using special features of the input filters which tell the SDM-SIO4 only to recognise the start and end of data (using the x and X options – see Section 3). These options only allow the datalogger to collect data once a complete data set has been received by the SDM-SIO4 (avoiding problems of collection in mid- transmission). Thus, by polling the SDM-SIO4 using command 1, it is possible to see if data has been received and if so use a second call of the datalogger SDM-SIO4 instruction to collect the available data.

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Contents Issued Page Guarantee Page Contents Data Error Detection Appendix A. Ascii TableWhat is the SDM-SIO4? IntroductionDatalogger Command Control Specifications SDM-SIO4 Serial Port Pin ConfigurationSerial Ports Serial Port BuffersPower Requirements SDM PortCase Environmental Operating RangeOther Key Features Page Installation and Hardware Set-Up Setting the SDM AddressAddress Settings Selector Block Settings SDM AddressSelecting RS232 or 5V Logic for Each Port Connections to the SDM-SIO4Transient Protection and Grounding Power-on Tests the Status LED Status LED Error CodesNo. of Flashes Description of error/status Page Understanding How the SDM-SIO4 Handles Data IntroductionMethod of Entering Special / Control Characters Input Filters Filter TypesSimple Filters Filter Strings Ibn8Ficn8F Output Formatting Simple Output FormatterPredefined Filter Strings Filter No Filter String UsedOutput Format Strings Fmtst 123 z261 f62 iBattery z257 f61z273 CR10X Program ExampleGet battery voltage Get panel temperatureCommand Line Operation and Structure Entering CommandsProgramming the SDM-SIO4 Basic Commands Advanced Commands Errorres Hexdump start address number of bytesBytewr address byte WD n Wderr n Wdaddr nTestio test# Testio returnsPage Programming the Datalogger Instruction 113 ParametersCommands and Options Parameters 4, 5 Parameter 7 Values per RepParameter 8 Starting Input Location Parameters 9 and 10 Multiplier and OffsetCommand 1 Poll of Available Data Understanding Parameter Options and Returned ValuesCommand 2 Signatures Command 3 Flush all Receive BuffersCommand 4 Send Data to Datalogger Command 5 StatusCommand 6 Flush Transmit Buffer Command 7 Activate Command LineCommand 8 Poll Tx Buffers for Data Command 9 Flush Converted Data BufferCommand 67 Get Return Code Command 320 Send Byte Data to SDM-SIO4Command 321 Execute Command Line Command Program Example for P113 CommandExecute the command line string Command 1024 Send String to Device Command 1025 Transmit a ByteCommand 1026 Serial Port Status First Value ReturnedFirst Command Option Reset Error Counters Second Value ReturnedThird Value Returned Fourth Value ReturnedCommand 1027 ‘Manual’ Handshake Mode Command 2049 Set Communications ParametersFirst Command Option Parameter Second Command Option ParameterCommand 2054 Set Up Receive Filter String Number or Character Code SDM-SIO4 Configuration Examples Command 2305 Transmit BytesExample CR10X Program End of serial and filter setup Set flag one high so the above will only be done onceGet two floating point numbers into locations 1 Example CR10X Program Using Instruction P113 Command Strst 101 Send DataJMSet up the filter and then send string Wait long enough for sensor to send dataSensors Which Send Data Out Without Prompting Get data from SDM-SIO4 and put into locations 1Time stamp Instantaneous sample form the sensorExample CR10X Program without Polling or Interrupts Fltst 200 tdataA5xffExample CR10X Program using the Polling Method End of set upGet the two floating point values from the SDM-SIO4 Instantaneous values stored to final storageSet up string filter Delay required by filter set-up commandDo filter set-up only if flag one is clear Set flag one high so the filter set-up is only done onceExample CR10X Program using Interrupts Get voltages into locations 3 and 4 if poll was trueInstantaneous value stored into final storage Do filter setup only if flag one is clear Delay required by filter setup commandSet control port 8 to i/p so it can be used as an interrupt Interrupt routine for control port Get voltages into locations 3Instantaneous readings stored into final storage End of interrupt routineOutputting Datalogger Data Return Error Codes Flushing the Input and Output BuffersData Error Detection Error Detection with the SDM-SIO4Received Data SDM-SIO4 User Guide Example of Using Received Data Filters 2 CR10X Program ExampleFltst 100 TFrequency=xg2n10fCCG8 Minimum delay of 4ms is required by the above P113 End of filter setupTell the SDM-SIO4 to use filter string End of get data Transmitted Data CRC32Example of Using Transmitted Data Filters Fmtst 100 g1i123456789G8Alternative CR10X Program Fmtst 100 g1 Fmtst 101 isome data Fmtst 102 f62 G8Use formatter string 100 to set up the CRC16 on port Minimum delay of 1ms is required after this commandMinimum delay of 3.8ms is required after this command Send the Ascii characters ‘Y’ and ‘Z’ to portCRC16-CCITT-IBM Data Error Detection Page Appendix A. Ascii Table Dec CharPage Appendix B. Serial Port Data Transfer Modes Baud ratesStop Bits Data LengthParity Bits Serial Handshake Modes