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CM Configuration and API Guide Page 4/60
1INTRODUCTION TO THE CM DISTANCE SENSORS ............................................6
1.1 INTRODUCTION.............................................................................................................6
1.2 COMMUNICATION PROTOCOL.........................................................................................6
1.3 COMMANDS IN CONFIGURATION MODE...........................................................................7
2OPERATION MODES.............................................................................................10
2.1 LIST OF OPERATION MODES.........................................................................................10
2.2 OUTPUT AT STARTING OF THE OPERATION MODE ..........................................................12
3DISTANCE MEASUREMENTS...............................................................................13
3.1 ASCII MODE..............................................................................................................13
3.1.1 ASCII format of the distance measurement..........................................................13
3.2 BINARY FORMAT OF THE DISTANCE MEASUREMENT.......................................................14
3.2.1 Centimeter output format (2–3 bytes)...................................................................14
3.2.2 Extended centimeter output format (3–4 bytes)....................................................15
3.2.3 Millimeter output format (3–4 bytes).....................................................................16
3.3 CONTINUOUS BINARY MODE ........................................................................................17
3.4 BINARY MODE,HW CONTROLLED ................................................................................18
3.5 BINARY MODE,SERIAL CONTROLLED............................................................................19
3.6 CAPTURE MODE,HW CONTROLLED .............................................................................21
3.7 CAPTURE MODE,SERIAL CONTROLLED.........................................................................21
3.8 SYNCHRONIZED BINARY MODE FOR CM(P)5X..............................................................22
4SPEED MEASUREMENTS.....................................................................................24
4.1 SPEED MEASUREMENT MODE WITH TWO SENSORS........................................................24
4.1.1 Vehicle length and height.....................................................................................26
4.1.2 Output format.......................................................................................................27
4.1.2.1 Result............................................................................................................................27
4.2 SPEED MEASUREMENT MODE WITH ONE SENSOR..........................................................28
4.2.1 User’s control over the speed calculation .............................................................32
4.2.2 Adaptive measurement window for departing vehicles.........................................32
4.2.3 Vehicle profile data...............................................................................................34
4.2.4 Automatic distance setting of measurement window ............................................34
4.3 CONTINUOUS SPEED MODE.........................................................................................35
4.4 SIZE MODE.................................................................................................................36
4.5 MULTILANE SPEED MEASUREMENT MODE .....................................................................36
5DETECTION MODES .............................................................................................39
5.1 TRIGGER WINDOW MODE.............................................................................................39
5.1.1 In window and Out of window triggering...............................................................40
5.1.2 Trigger count and timing information....................................................................41
5.1.3 Profile measurement............................................................................................41
5.2 MOVEMENT TRIGGER MODE.........................................................................................42
6TROUBLESHOOTING............................................................................................44
6.1 ERROR TABLE ............................................................................................................44
6.2 EXPLANATIONS OF THE ERROR CODES.........................................................................44
6.3 SELF-TEST ERRORS....................................................................................................45
6.4 ERRORS DURING MEASUREMENT.................................................................................46
7PARAMETERS .......................................................................................................47
7.1 USER PARAMETER COMMANDS....................................................................................47
7.2 PERMANENT MEMORY PARAMETERS ............................................................................49
7.3 PARAMETER LIST........................................................................................................49
7.4 CONTROL BYTE 1.......................................................................................................55
