Set up the filter and then send string | Campbell Hausfeld SDM-SIO4

Section 5. Programming the Datalogger

^J^M – this is a way of entering control characters for carriage return/linefeed into a string

The following program example works as follows:

1.The first P113 sets up a simple filter to search for floating point numbers.

2.The first parameter of this command is used to transmit a string which will prompt the sensor into taking measurements and then transmitting the numbers to the SDM-SIO4.

3.A delay is required by the set up formatter command and is calculated as follows:

delay=chars*0.26*ports.

This works out as the following: 11*0.26*1 = 2.86ms. Also you will have to wait long enough for the sensor to respond which must include the time to receive and transmit the data. This example is using a 9600 baud rate, and so 11 characters could take 12ms for the sensor command and another 20 characters (21ms) for output data from the sensor. The total time before the datalogger can get the data would therefore be 2.86+12+21 = 35.86ms. This time does not allow for any delay that the sensor may have in executing and taking any measurements. This example gives the sensor 4.24ms for measurements by giving P22 a 40ms delay.

4.By doing the above, the datalogger can get the two floating point values returned from the sensor into locations 1 and 2.

*Table 1 Program

01: 2 Execution Interval (seconds)

;set up the filter and then send string 101.

1:SDM-SIO4 (P113)

1:	1	Reps
2:	0	Address
3:	1	Send/Receive Port 1
4:	2304	Command
5:	8101	1st Parameters
6:	1999	2nd Parameters
7:	0	Values per Rep
8:	0	Loc [	]
9:	1.0	Mult
10:	0.0	Offset

;wait long enough for sensor to send data.

2:Excitation with Delay (P22)

1:1 Ex Channel

2:0 Delay W/Ex (units = 0.01 sec)

3:4 Delay After Ex (units = 0.01 sec)

4:0 mV Excitation

5-17

Image 47

Campbell Hausfeld SDM-SIO4 manual Set up the filter and then send string, Wait long enough for sensor to send data

Contents

Issued Page Guarantee Page Contents Appendix A. Ascii Table Data Error Detection Introduction What is the SDM-SIO4? Datalogger Command Control Serial Port Buffers SpecificationsSDM-SIO4 Serial Port Pin Configuration Serial Ports Environmental Operating Range Power RequirementsSDM Port Case Other Key Features Page Selector Block Settings SDM Address Installation and Hardware Set-UpSetting the SDM Address Address Settings Transient Protection and Grounding Selecting RS232 or 5V Logic for Each PortConnections to the SDM-SIO4 No. of Flashes Description of error/status Power-on Tests the Status LEDStatus LED Error Codes Page Method of Entering Special / Control Characters Understanding How the SDM-SIO4 Handles DataIntroduction Simple Filters Input FiltersFilter Types Filter Strings Ibn8Ficn8F Filter No Filter String Used Output FormattingSimple Output Formatter Predefined Filter Strings Output Format Strings CR10X Program Example Fmtst 123 z261 f62 iBattery z257 f61z273 Get panel temperature Get battery voltage Programming the SDM-SIO4 Command Line Operation and StructureEntering Commands Basic Commands Advanced Commands WD n Wderr n Wdaddr n ErrorresHexdump start address number of bytes Bytewr address byte Testio returns Testio test#Page Instruction 113 Parameters Programming the Datalogger Parameters 9 and 10 Multiplier and Offset Commands and Options Parameters 4, 5Parameter 7 Values per Rep Parameter 8 Starting Input Location Understanding Parameter Options and Returned Values Command 1 Poll of Available Data Command 5 Status Command 2 SignaturesCommand 3 Flush all Receive Buffers Command 4 Send Data to Datalogger Command 9 Flush Converted Data Buffer Command 6 Flush Transmit BufferCommand 7 Activate Command Line Command 8 Poll Tx Buffers for Data Program Example for P113 Command Command 67 Get Return CodeCommand 320 Send Byte Data to SDM-SIO4 Command 321 Execute Command Line Command Execute the command line string First Value Returned Command 1024 Send String to DeviceCommand 1025 Transmit a Byte Command 1026 Serial Port Status Fourth Value Returned First Command Option Reset Error CountersSecond Value Returned Third Value Returned Command 2049 Set Communications Parameters Command 1027 ‘Manual’ Handshake Mode Second Command Option Parameter First Command Option Parameter Command 2054 Set Up Receive Filter String Number or Character Code Example CR10X Program SDM-SIO4 Configuration ExamplesCommand 2305 Transmit Bytes Get two floating point numbers into locations 1 End of serial and filter setupSet flag one high so the above will only be done once Strst 101 Send DataJM Example CR10X Program Using Instruction P113 Command Wait long enough for sensor to send data Set up the filter and then send string Instantaneous sample form the sensor Sensors Which Send Data Out Without PromptingGet data from SDM-SIO4 and put into locations 1 Time stamp Fltst 200 tdataA5xff Example CR10X Program without Polling or Interrupts Instantaneous values stored to final storage Example CR10X Program using the Polling MethodEnd of set up Get the two floating point values from the SDM-SIO4 Set flag one high so the filter set-up is only done once Set up string filterDelay required by filter set-up command Do filter set-up only if flag one is clear Instantaneous value stored into final storage Example CR10X Program using InterruptsGet voltages into locations 3 and 4 if poll was true Set control port 8 to i/p so it can be used as an interrupt Do filter setup only if flag one is clearDelay required by filter setup command End of interrupt routine Interrupt routine for control portGet voltages into locations 3 Instantaneous readings stored into final storage Outputting Datalogger Data Flushing the Input and Output Buffers Return Error Codes Received Data Data Error DetectionError Detection with the SDM-SIO4 SDM-SIO4 User Guide Fltst 100 TFrequency=xg2n10fCCG8 Example of Using Received Data Filters2 CR10X Program Example Tell the SDM-SIO4 to use filter string Minimum delay of 4ms is required by the above P113End of filter setup End of get data CRC32 Transmitted Data Fmtst 100 g1i123456789G8 Example of Using Transmitted Data Filters Fmtst 100 g1 Fmtst 101 isome data Fmtst 102 f62 G8 Alternative CR10X Program Send the Ascii characters ‘Y’ and ‘Z’ to port Use formatter string 100 to set up the CRC16 on portMinimum delay of 1ms is required after this command Minimum delay of 3.8ms is required after this command CRC16-CCITT-IBM Data Error Detection Page Dec Char Appendix A. Ascii TablePage Data Length Appendix B. Serial Port Data Transfer ModesBaud rates Stop Bits Serial Handshake Modes Parity Bits