Campbell Hausfeld SDM-SIO4 3.3 Output Formatting

Section 3. Understanding How the SDM-SIO4 Handles Data

3-5

2. n8 discards everything up to 12.65V.

3. F converts the number to Campbell Scientific floating point. If a valid number

is not found -99999 is sent to the datalogger.

4. i[c] waits for the trigger character ‘c’ of ‘current’.

5. n8 discards everything up to 12mA.

6. F converts the number to Campbell Scientific floating point. If a number is not

found -99999 is sent to the datalogger.

This filter will repeat the above operations on all incoming values.

Predefined Filter Strings

A small number of fixed filter strings are pre-defined as follows:

Filter No. Filter String Used

256 r1

257 r2

258 r3

259 r4

3.3 Output Formatting

The output formatters are used to format data from the datalogger into English

text messages, send strings/commands to sensors and to output text to a display.

For example, you may have a display on which you want to show air temperature

and humidity. The datalogger would take the measurements from the sensors, and

place two values into appropriate input locations. It would be impractical for the

datalogger to store text labels in this way, and so you could use the SDM-SIO4 to

send a label to the display along with the data from the datalogger.

The final result may be displayed as:

The temperature is 23.7C

The humidity is 65.8%

The string generated would then be transmitted from the selected serial port.

Because the formatter is programmable, almost any string can be output from the

serial port, either by programming the datalogger or by using the command line.

3.3.1 Simple Output Formatter

This can be set up by the datalogger and allows data to be transmitted out of the

SDM-SIO4 in a number of simple formats. It is not necessary to use the command

line mode to use these formats. Simple output formats are as follows:

• Convert a location sent into ASCII floating point. If this option is selected an

extra ASCII character/delimiter can be added to the end of the ASCII number

sent.

• Convert a location sent into an ASCII hex pair. If this option is selected an

extra ASCII character/delimiter can be added to the end of the hex number

sent.

• Convert a location sent into an 8-bit binary byte. If this option is selected an

extra ASCII character/delimiter can be added to the end of the byte sent.

Contents

Main Page Guarantee Page Contents Section 1. Introduction..................................................... 1-1 Section 2. Installation and Hardware Set-Up.................. 2-1 Section 4. Programming the SDM-SIO4.......................... 4-1 Section 5. Programming the SDM-SIO4.......................... 5-1 Figures Tables Section 1. Introduction 1.1 What is the SDM-SIO4? SDM-SIO4 4-Channel Serial I/O Interface User Guide K K K Figure 1 Schematic Diagram of the SDM-SIO4 PORT Command Line Control Datalogger Command Control 1.2 Specifications 1.2.1 Serial Ports Serial Port Buffers 1.2.2 SDM Port 1.2.3 Case 1.2.4 Power Requirements 1.2.5 Environmental Operating Range 1.2.6 Other Key Features Page Section 2. Installation and Hardware Set-Up 2.1 Setting the SDM Address 2.2 Selecting RS232 or 5V Logic for Each Port 2.3 Connections to the SDM-SIO4 2.3.1 Transient Protection and Grounding 2.4 Power-on Tests the Status LED Page Section 3. Understanding How the SDM-SIO4 Handles Data 3.1 Introduction 3.1.1 Method of Entering Special / Control Characters 3.2 Input Filters 3.2.1 Filter Types Simple Filters Filter Strings Page Predefined Filter Strings 3.3 Output Formatting 3.3.1 Simple Output Formatter 3.3.2 Output Format Strings CR10X Program Example Page Section 4. Programming the SDM-SIO4 4.1 Command Line Operation and Structure 4.2 Entering Commands 4.3 Basic Commands fltst [string number] ["filter definition"] strst [string number] ["string definition"] fmtst [string number] ["format definition"] strdelete [string number] 4.4 Advanced Commands version portset [delay] reset hexdump errorres bytewr Section 4. Programming the SDM-SIO4 testio [test#] Page Section 5. Programming the Datalogger 5.1 Instruction 113 Parameters 5.1.1 Parameter 1 Reps 5.1.2 Parameter 2 Address 5.1.3 Parameter 3 Mode 5.2 Commands and Options (Parameters 4, 5 and 6) 5.2.1 Understanding Parameter Options and Returned Values 5.2.2 Command 1: Poll of Available Data 5.2.3 Command 2: Signatures 5.2.4 Command 3: Flush all Receive Buffers 5.2.5 Command 4: Send Data to Datalogger 5.2.6 Command 5: Status 5.2.7 Command 6: Flush Transmit Buffer 5.2.8 Command 7: Activate Command Line 5.2.9 Command 8: Poll Tx Buffers for Data 5.2.10 Command 9: Flush Converted Data Buffer 5.2.11 Command 66: Send Single-Byte Data to Datalogger 5.2.12 Command 67: Get Return Code 5.2.13 Command 320: Send Byte Data to SDM-SIO4 5.2.14 Command 321: Execute Command Line Command Program Example for P113 Command 321 5-7 ;execute the command line string. ;delay large enough (10ms) to allow SDM-SIO4 instruction 321 to finish. 5.2.15 Command 1024: Send String to Device 5.2.16 Command 1025: Transmit a Byte 5.2.17 Command 1026: Serial Port Status First Value Returned Second Value Returned Third Value Returned Fourth Value Returned First Command Option Reset Error Counters 5.2.18 Command 1027: Manual Handshake Mode 5.2.19 Command 2049: Set Communications Parameters Second Command Option (Parameter 6) 5.2.20 Command 2054: Set Up Receive Filter 5.2.21 Command 2304: Transmit String and/or Data to Device (Formatter/Filter) Second Command Option (Parameter 6) String Number or Character Code 5.2.22 Command 2305: Transmit Byte(s) 5.3 SDM-SIO4 Configuration Examples Example CR10X Program 5-15 ;set up a simple filter 1999 search for floating point number. ;the set up filter command requires a delay of 4ms, the nearest we can get ;is 10ms with P22. ;set flag one high so the above will only be done once. ;end of serial and filter setup. 5.3.1 Sensors Where the Datalogger Can Request Data by Sending a Prompt or Using a Handshaking Line Example CR10X Program Using Instruction P113 Command 4 Page 5.3.2 Sensors Which Send Data Out Without Prompting Example CR10X Program without Polling or Interrupts Example CR10X Program using the Polling Method Page Example CR10X Program using Interrupts Page Page 5.4 Outputting Datalogger Data 5.5 Flushing the Input and Output Buffers 5.6 Return Error Codes Section 6. Data Error Detection 6.1 Error Detection with the SDM-SIO4 6.2 Received Data Page 6.2.1 Example of Using Received Data Filters 6.2.2 CR10X Program Example Page Page 6.3 Transmitted Data 6.3.1 Example of Using Transmitted Data Filters 6.3.2 CR10X Program Example 6.3.3 Alternative CR10X Program 6-9 ;use formatter string 100 to set up the CRC16 on port 1 ;A minimum delay of 1ms is required after this command ;use formatter string 101 to transmit the string get data to port 1 ;a minimum delay of 3.8ms is required after this command Page Page Page Appendix A. ASCII Table Page Appendix B. Serial Port Data Transfer Modes B.1 Baud rates B.2 Stop Bits B.3 Data Length B.4 Parity Bits B.5 Serial Handshake Modes