描述
为了处理急需响应的输入信号，PLC有种种措施。不同的PLC措施也不完全相同，提高响应速度的效果也不同。一般的作法是采用输入中断，然后再输出即时刷新，即中断程序运行后，有关的输出点立即刷新，而不等到整个程序运行结束后再刷新
SYMBOL MOTOROLA DS6707-SRWU0100ZR Kit: USB Series A, 7f
SYMBOL MOTOROLA DS6707-SRBU0100ZR KIT: USB Series A, 7f
SYMBOL MOTOROLA DS6708-SMBK0100ZR Kit: Keyboard PS/2 7f
SYMBOL MOTOROLA DS6708-SMWK0100ZR Kit: Keyboard PS/2, 7
SYMBOL MOTOROLA DS6708-DL20001ZZR SCANNER: MULTI, DL, W
SYMBOL MOTOROLA MS-4407HD-I000R MINISCAN IMAGER, HD,TTL
SYMBOL MOTOROLA MS-4407-I000R MINISCAN IMAGER, STD, TTL
SYMBOL MOTOROLA DS6708-DL20007ZZR SCANNER: MULTI, DL, B
Motorola/symbol 2a Ds6707-srbu0100zr Ds6707 Kit/usb
Motorola Symbol Ms4407 Bar Code Reader – Mountable Bar
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