Description
PCIe-6738 National Instruments
PCIe-6738 National Instruments
Module Clips Drive controller servo motor
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How is the SCXI channel multiplexed when there are other inputs in the DAQ board?
Hardware: SCXI
Question:
How does the DAQ board perform channel scanning when both the multiplexing channel of SCXI and other directly connected inputs are connected to the DAQ board simultaneously?
Answer: Most SCXI modules will reuse their input terminals on the DAQ channel where the module is located. Therefore, when a DAQ board scans channels, it must first go through each channel of each SCXI module before scanning the next DAQ channel. The following example can better illustrate this point: PCIe-6738 National Instruments
Suppose you have an SCXI 1000 chassis with an SCXI 1102 module connected to channel 0 of the DAQ board. In this module, you have 32 input channels (0 to 31) receiving signals from different signal sources. Also, suppose you have a sine signal connected to channel 1 of the DAQ board.
Once the DAQ board starts scanning channel 0, it will scan each channel of the SCXI module (here from 0 to 31) before starting scanning channel 1, which is the sine wave you input.
However, when the SCXI module operates in parallel mode, each channel on the module will be directly mapped to each channel on the DAQ board (up to the maximum number of channels that the DAQ board can support). Therefore, in the multiplexing mode, you must select the physical channel of the SCXI module, such as SC1Mode1/ai0. The scanning sequence is the same as that of the DAQ board channel scanning. Check the link below to obtain information on the SCXI module that can work in parallel mode.
Unable to communicate with my serial instrument
Main software: LabVIEW Development Systems>>Full Development System
Main software version: N/A
Main software revision version: N/A
Secondary software: LabVIEW Development Systems
Hardware: Serial
Problem: I am communicating with my serial instrument. When the HyperTerminal input command, the device correctly responded. But when I input the same command in LabVIEW, I get an incorrect response or timeout. Why can my device be used in HyperTerminal but not in LabVIEW? Even if I use the example of “LabVIEW<->Serial”, it won”t work.
Answer: Your device may be waiting for the carriage return byte at the end of the instruction. This byte appears in the “” Codes Display in the form of ” r”. You can right-click on the string and select “” Codes Display. In HyperTerminal, the carriage return byte is sent by pressing the enter key. In LabVIEW, line breaks are represented by n, but when communicating with the device, you should add r to send out the carriage return byte.
When using NI 6601 or 6602 for digital IO collection, counters with numbers 2 and higher cannot function properly.
Hardware: Counter/Timers (TIO)>>Devices>>PCI-6602, Counter/Timers (TIO)>>Devices>>PXI-6602, Counter/Timers (TIO)>>Devices>>PXI-6608, Counter/Timers (TIO)>>Devices>>PCI-6601
Question:
Use both counters and digital IO on the 660x series board. Counter 0 and counter 1 can function normally, but counter 2 and higher numbered counters cannot function properly. Why is this? How to improve?
Answer:
Using NI660x devices, counters 2 and above share line resources with 32-bit digital IO ports (refer to KB connection Knowledgebase 1I1DALL). No matter which line you are using, as soon as you start a digital task, all digital ports will be redefined. If a digital task starts after the counter output task starts, it will prevent the shared line from generating pulses.
To avoid this phenomenon, you can start the digital input or output task before starting the counter task (refer to KBDeveloper Zone Example). In this way, as long as two tasks do not start using line resources at the same time, it can ensure the normal operation of the task. For more information on setting up a 660x digital line, you can refer to KB Connection KnowledgeBase 1LK9SPX4.
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1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
All kinds of module card driver controller servo motor servo motor embedded card wires and cables Power module control module is applicable to steel, hydropower, nuclear power, power generation, glass factory, tire factory, rubber, thermal power, paper making, shipping, navigation, etc
ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit
Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts
ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit
Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts
