Eaton Electrical D77A user manual Adc Cpu, Filter Setting Total Update Time

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Intelligent Technologies (IT.) D77A I/O Module Products

Analog Input Modules

Figure 20 illustrates the basic signal processing operation. Analog signals from four separate channels are received by a multiplexer (MUX). The MUX sequentially transfers this data to an analog-to-digital converter (ADC). The ADC measures the analog signal and converts it to a digital value. This digital value is presented to the controller’s central processes unit (CPU). This data is then presented to the QCPort for external processing.

V0
I0
V1	M
	M
I1	U		ADC	CPU	QC Port
V2	X
V2
I2
V3
I3
C0
C1	V1	+V2	-V2
C1
C2
C3
					SCHEM-001

Figure 20: Analog Input Module Operation

Analog input signal delays are associated with multiplexer switching, channel updating and channel reconfiguration. These delays are all influenced by analog input filter frequency selection.

Table 24: Analog Input Signal Delays

Filter Setting	Total Update Time


50 Hz	336 ms

60Hz	283.2 ms

250 Hz	80 ms

500 Hz	44 ms

MN05002001E

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Contents D77A-AI8D77A-AI8AQ8 Intelligent Technologies IT D77A I/O Module ProductsPage Important Notice Please Read Table of Contents List of Tables List of FiguresPage Safety Definitions and SymbolsHazardous High Voltage Avis Aviso General SafetyAll Modules IntroductionDiscrete Input Modules Discrete Output ModulesAnalog Input Modules Discrete Combination ModulesAnalog Output Modules Approval CertificationsCatalog Numbering System D77A a Q 16Physical Description SpecificationsDimensional Data Power RequirementsSurge Suppression Device Default I/O Data Environmental SpecificationsCategory Description Specification Bit ByteModule Summary Voltage Part NumberType I/O Description Input Specifications AC Input Module SpecificationsCatalog Number D77A-AI8 D77A-AI16 Catalog Number D77A-DI8 D77A-DI16 DC Input Module SpecificationsD77A-NI4 Catalog Number Voltage Input Current Loop Input Analog Input Module SpecificationsSee D77A-NI4 Analog Input Module Specifications on Bit Resolution Equations Output Specifications AC Output Module SpecificationsCatalog Number D77A-AQ8 D77A-AQ16 Catalog Number D77A-DQ8 D77A-DQ16 DC Output Module SpecificationsCatalog Number D77A-RQ8 D77A-RQ16 Relay Output Module SpecificationsD77A-NI4 Catalog Number Voltage Output Current Loop Output Analog Output Module SpecificationsAnalog Output Curves for 14 Bit Resolution Special I/O Specifications Combination Module SpecificationsCatalog Number DC Sink/Source Input DC Mosfet Sink Output Catalog Number DC Sink/Source Input Relay Output D77A-DI8RQ8Catalog Number AC Input AC Output D77A-AI8AQ8Catalog Number AC Input Relay Output D77A-AI8RQ8Out-of-box Default Operation Theory of OperationTypical Application Discrete Input Module Operation FunctionDiscrete Combination Module Operation ADC CPU Filter Setting Total Update TimeCPU DAC Setting Group ID InstallationModule Preparation Installation Without BackplaneInstalling the Module Installation With Backplane Do not rock the module onto the DIN rail Interconnects/Connections QCPort ConnectionsPre-manufactured QCPort Interconnect Cables O Property ConfigurationSymbol Definition Field WiringMOV AC Inputs AC Input WiringDC Inputs DC Input WiringAnalog Inputs Analog Input WiringAC Outputs AC Output WiringDC Outputs DC Output WiringRelay Outputs Relay Output WiringAnalog Outputs Analog Output WiringCombination I/O Combination I/O WiringFault Codes Troubleshooting and MaintenanceStatus LED State LED BehaviorCommunication Troubleshooting Hints TroubleshootingRenewal Parts Explanation of LED Duty Cycle StatesProblem Solution Communication HintsStatus LED Description Explanation Data Parameters Appendix aSize Description Byte BitSign Bit = True = False + Mode Description Active/Passive Configuration Parameters0x8006 32774 Slave Address Timer will not decrement Analog Data Registers IT. Publications and SupportPublications Publication DescriptionCompany Information