描述
PLC的扫描工作方式引起的延迟可达2－3个扫描周期。对于大多数应用场合来说，PLC的响应速度都可以满足要求，不是主要问题。然而对于某些个别场合，则要求考虑PLC的响应速度。为了减少PLC的I／O响应的延迟时间，可以选用扫描速度高的PLC，或选用具有高速I／O处理功能指令的PLC，或选用具有快速响应模块和中断输入模块的PLC等。
National Instruments GPIB-VXI C SIZE MODULE
One-day shipping available
National Instruments CB-68LPR 68-Pin IO Connector Block
National Instruments SH100100 2-Meter E-Series Cable
National Instruments GPIB-485CT-A; GPIB = RS-485/422
NATIONAL INSTRUMENTS PCI-6503 24 chan Digital I/O
NATIONAL INSTRUMENTS PCI-232/485 2CH 84686A-01
National instruments MXI-4 controller copper cable NI
National Instruments- 2M GPIB Cable- 763061-02
National Instruments NB-GPIB Mac NuBus Card 180510-01
Surveying instruments (National Council of Teachers of
