描述
由扫描工作方式引起的滞后时间最长可达两个多扫描周期。
PLC总的响应延迟时间一般只有几十ms，对于一般的系统是无关紧要的。要求输入输出信号之间的滞后时间尽量短的系统，可以选用扫描速度快的PLC或采取其他措施。
Working board. Xilinx Spartan XCS30, I-Cube chips
AMAT SBC Computer Board Dual 1 GHz 0660-A1250 working
KLA-Tencor AIT 2 Timing Generator Board 0053946-000
KLA-Tencor AIT 2 MMD Analog Board 565040 working
KLA-Tencor AIT 2 MMD Analog Board 565040 working
Edwards Dry Vacuum Pump iQDP80 Untested, AS-IS
Granville-Phillips 307 Vacuum Gauge Controller working
CTI-Cryogenics On-Board 8F Cryopump 8116081G006
Granville-Phillips 307 Vacuum Gauge Controller working
Varian E1000 RDAC Sub Assy. 101866004 working
Varian E1000 RDAC Sub Assembly 101866004 working
Tektronix Arbitrary Waveform Generator VX4790A working
