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。
Hard Drive SCSI Quantum VP31080 QM31080SN-S RevB
SCSI Hard Drive Quantum VP32170W QM32170SN-SWAD RevA
Motherboard Socket7 Vtech/PcPartner MB500N 35-8212-32
Motherboard Socket7 Gigabyte GA586VX Rev3.3 430VX 3ISA
Motherboard Socket7 Gigabyte GA586VX Rev3.34 430VX 3ISA
Motherboard Socket7 Gigabyte GA586VX Rev3.33 430VX 3ISA
LI-020 ARCnet 8-bit ISA IBM PC/XT/AT UM9065L TC3068A
Equinox Megaport 8CS 910168/A 8-port Serial ISA Card RJ
Motherboard 486 486VL ISA Micro Industries Centigram
SBC Slot1 Peak 630C 630-C PICMG Industrial Computer MB
Caliper CP-60B CP60B QIC QIC36 QIC-36 SCSI Tape Drive
Ramix PMC663 PMC Dual 100/10 Ethernet Card 700462
