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VTB USER GUIDE
11.12 Functions for NGQx Analog Outputs and encoder inputs
Functions for NGQx Analog Outputs and encoder inputs
Hardware NGQx
NG_DAC – Analog Outputs NGQx
This function allows to update the analog outputs of each channel equipped in the NGQx This expansions have 2 digital
to analog converter at 12 bit, with a range of +/-10V. Therefore a value of +2047 corresponds to 10V in output, a value
of -2047 corresponds to -10V.
The selection of the channel is made by an index from 0 to 1.
WARNING: For enable the analog outputs on NGQx, is necessary set the following property
ENCODER ENABLE=true on NGQ INIT Object
Syntax
NG_DAC(Char Chan, Long Val)
Parameters
Chan Number of channel (from 0 to 1)
val Value of the output
Example
Used variables:
val LONG
channel CHAR
channel = 0
val = 1024
ng_dac(channel, val) ' write 1024 (~5V) to analog channel 0
ng_dac(1,512) ‘ write 512 (~2,5V ) to analog channel 1
NG_DAC_CAL - CALIBRATION OF THE ANALOG OUTPUT OFFSET NGQx
This function allows to calibrate the OFFSET of the analog outputs. Usually it can be occur that the analog output has a
little value of voltage (OFFSET) in the order of mV also if zero has been set. With ng_dac_cal we can null this voltage
setting a value opposite to the offset one. Remind that for each unit the output value will be about 4mV.
Syntax
NG_DAC_CAL(Char Ch,Long Offset)
Parameters
Chan Number of channel (from 0 to 1)
Offset OFFSET value
WARNING: THE OFFSET VALUE ISN'T SAVED AND IT MUST BE SET AT EACH TURN-ON.
NG_ENC - ENCODER INPUTS
This function allows to read the quadrature encoder input of each channel equipped on the expansion card NGQx The
resolution is 32 bits. This function read only the increment which will be added to a variable passed by its pointer.
Therefore the real encoder counter will be contained in a variable defined in the application and it will can be zeroed in
any time. For a correct processing of the encoders we recommend to use this function only in TASK PLC and then use it
at the occurrence.
The selection of the channel is made by an index from 0 to 1
WARNING: For enable the encoder inputs on NGQx, is necessary set the following property
- Rev. 3.00.0 2
- 1 INTRODUCTION 3
- 3 DEVELOPMENT ENVIRONMENT 4
- 3.1 Toolbar 5
- 3.2 Project Manager 8
- 3.3 Objects manager 9
- 3.4 Functions Manager 10
- 3.5 Objects Property 10
- 3.6 Text Table Manager 10
- 4 CONFIGURATION OF VTB 11
- 4.1 General Options 11
- 4.2 RS232 Protocol 12
- (OBSOLETE) 12
- 4.3 Field-Bus Protocol 13
- 5 TASKS MANAGED BY VTB 16
- 5.1 Task Plc 17
- 5.2 Task Time 18
- 5.3 Task Main 18
- 5.4 Page Task 18
- 6 VARIABLES TYPE 20
- 6.1 Numeric Values 20
- 6.2 Internal Variable 21
- 6.3 Pointers 22
- 6.4 Bit 24
- 6.5 Arrays 25
- 6.7 System Variables 27
- 6.8 Static Variables 28
- 6.9 Fixed Variables 29
- 6.10 Delegates 30
- 6.11 DEFINE 31
- 6.12 Text Tables 32
- OBSOLETE 32
- 6.13 Structures 32
- 7 OPERATORS 33
- 7.2 Notes on Expressions 34
- 8 MATH FUNCTIONS 35
- 8.1 SIN 35
- 8.2 COS 35
- 8.3 SQR 35
- 8.4 TAN 35
- 8.5 ATAN 36
- 8.6 ASIN 36
- 8.7 ACOS 36
- 8.8 ATAN2 37
- 8.9 ABS 37
- 8.10 FABS 38
- 9.1 IF-ELSE-ENDIF 39
- 9.2 LABEL 39
- 9.3 GOSUB-RETURN 40
- 9.4 GOTO 40
- 9.5 INC 41
- 9.6 DEC 41
- 9.7 SELECT-CASE-ENDSELECT 41
- 9.8 FOR-NEXT-STEP-EXITFOR 42
- 9.9 WHILE-LOOP-EXITWHILE 43
- 10 FUNZIONI 44
- 11 SYSTEM FUNCTIONS 46
- PROPERTY 53
- MOVETO 53
- LINETO 55
- ARCTO 56
- 11.5 CANOPEN FUNCTIONS 59
- PXCO_SEND 61
- PXCO_NMT 61
- 11.6 DATA SAVING FUNCTIONS 62
- 11.7 ETHERNET FUNCTIONS 63
- SET_IP 64
- PXETH_ADD_PROT 64
- PROTOCOL PROCESS FUNCTION 65
- PXETH_RX 65
- 11.8 DISK DRIVER FUNCTIONS 66
- REAL TIME CLOCK (RTC) 73
- NG_DI - DIGITAL INPUTS 74
- NG_DO – DIGITAL OUTPUTS 74
- NG_ADC – ANALOG INPUTS 75
- NG_DAC – ANALOG OUTPUTS 76
- NG_ENC - ENCODER INPUTS 77
- NGQ NGQx – ANALOG INPUTS 91
- 12 COMPONENT FOR FRAMEWORK 96
- 12.2 Exporting VARIABLES 97
- 12.3 Exporting FUNCTIONS 97
- 13 APPLICATION DEBUG 98
- 13.1 Button bar 98
- VTB USER GUIDE 100
- 13.2 Writing of a variable 103
- 13.4 Firmware update 104
- 13.5 Digital Scope 105
- 14 CANOPEN CONFIGURATOR 107
- 14.3 Main interface 108
- Tool bar 109
- Configuration panel 110
- Configuration Time-out 111
- Change PDO configuration 112
- Parameters 113
- 14.5 Project management 115
- 14.6 Library using 116
- 14.7 Note on “packed” PDOs 117
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