Baldor iMN1921 installation manual Analog I/O, Analog inputs

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4.4 Analog I/O

The NextMove ST provides:

HTwo 12-bit resolution analog inputs.

HOne 0-11V analog output.

4.4.1Analog inputs

HDifferential inputs.

HVoltage range: ±10V.

HResolution: 12-bit with sign (accuracy ±4.9mV @ ±10V input).

HInput impedance: 120kΩ.

HSampling frequency: 4kHz maximum, 2kHz if both inputs are enabled.

The analog inputs pass through a differential buffer and second order Butterworth filter with a cut-off frequency of approximately 1kHz.

Both inputs are normally sampled at 2kHz. However, an input can be disabled by setting ADCMODE to 4 (_acOFF). With one input disabled, the remaining input will be sampled at 4kHz. In MintMT, analog inputs can be read using the ADC keyword. See the MintMT help file for full details of ADC and ADCMODE.

	NextMove ST			15k
				15k
AIN0-	3	120k	-	10k	22nF	-
AIN0-	3		-	10k	10k	+
AIN0+	2		+			+
AIN0+	2	120k	+				MintMT
						10nF	MintMT
							ADC.0
							ADC.0
AGND	100pF	100pF
AGND	6

Figure 10 - Analog input, AIN0 shown

For differential inputs connect input lines to AIN+ and AIN-. Leave AGND unconnected.

MN1921

Input / Output 4-9

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Contents NextMove ST Motion Controller Page Contents Operation General Information Precautions Safety NoticeMN1921 Introduction NextMove ST featuresReceiving and inspection Units and abbreviations PhaseIntroduction MN1921 Location requirements You should read all the sections in Basic InstallationIntroduction Mounting the NextMove ST Package dimensionsOther requirements for installation Basic Installation MN1921 Input / Output Connector locations Operation using combined drive and logic supply Power connectionsConnecting separate drive and logic supplies Operation using separate drive and logic suppliesStepper axes 0-2 drive outputs Connecting a 4-wire motorStepper outputs Connecting a 6-wire motor Connecting a 8-wire motor, parallel windings Connecting a 8-wire motorStepper output pin header J3, and output circuit shown Stepper axes 0-3 logic outputsAnalog inputs Analog I/OAnalog output Analog outputDigital inputs Digital I/OAuxiliary Encoder inputs Auxstep IN, Auxdir IN, Auxz Using a digital input as a Limit or Home inputUsing a digital input as a Stop input Using a digital input as an Error inputDigital output DOUT0 shown Digital outputsJumper settings Error outputDriveenableoutput keyword Globalerroroutput keywordPin Name Description Other I/ORS232 serial communication LocationRS232 serial port connections 2 50-pin edge connectorTypical can network connections Can communicationCANopen and Baldor can JP1 This will connect an internal terminating resistorHost PC Connection summary minimum system wiringInput / Output MN1921 Preliminary checks Connecting the NextMove ST to the PCInstalling WorkBench Starting the NextMove STPower on checks Help file WorkBenchStarting WorkBench MN1921 Operation Selecting a scale Configuring an axisClick Apply Testing the output Stepper axis testingDigital input configuration Digital input/output configurationDigital output configuration Saving setup information Loading saved information SupportMe feature Problem diagnosisStatus display NextMove ST indicatorsSurface mount LEDs D3, D4 and D16 Motor control Symptom CheckCommunication Output power Value Input powerOutput current max Update interval Immediate Common mode voltage rangeInput impedance 120 Input ADC resolution Bits Equivalent resolution ±10V inputUnit Value Output type Stepper axis 0-2 drive outputsUnit Value Maximum output frequency KHz 200 Output voltage Output current maximum, per axisChannels Protocols CANopen Unit Value SignalCan interface EnvironmentalIndex Index MN1921 Comment CommentsComments MN1921 Page LT0184A00