描述
用手动开关暂时代替现场输入信号,以手动方式逐一对PLC输入端子进行检查、验证,PLC输入端子的指示灯点亮,表示正常;反之,应检查接线或者是I/O点坏。
我们可以编写一个小程序,在输出电源良好的情况下,检查所有PLC输出端子指示灯是否全亮。PLC输入端子的指示灯点亮,表示正常。反之,应检查接线或者是I/O点坏。
Juniper NS-ISG-1000-DC Firewall Advanced Gateway
90 Day Warranty – Free Shipping!
One-day shipping available
Juniper M320-FPC1 Warranty
Juniper Archer Longbow Data Collector 300m Rangefinder
NEW Juniper Networks J-4350-JB-A1 Router 1YearWrn 2XAvl
JUNIPER J-4350-JB-A1 – WARRANTY – NE
Juniper Rocker with Redwood seat and back
Juniper PB-48FE-TX-MDIX 48-port TX PIC M40e M120 M320
90 Day Hardware Warranty – Free Shipping Make Offer!
Juniper Netscreen NS-500es-GB2 VPN/Firewall 25 Vsys,500
Juniper SA4500 -SECURE ACCESS 4500 BASE SY
great seller / free shipping / great service!!!