描述
离线编程是指主机和编程器共用一个CPU，通过编程器的方式选择开关来选择PLC的编程、监控和运行工作状态。编程状态时，CPU只为编程器服务，而不对现场进行控制。在线编程是指主机和编程器各有一个CPU，主机的CPU完成对现场的控制，在每一个扫描周期末尾与编程器通信，编程器把修改的程序发给主机，在下一个扫描周期主机将按新的程序对现场进行控制。计算机辅助编程既能实现离线编程，也能实现在线编程。在线编程需购置计算机，并配置编程软件。采用哪种编程方法应根据需要决定。
Leybold Trivac D30AC Rotary Vane Pump- Rebuilt & Tested
Leybold Trivac D30AC Pump Single Phase Rebuilt & Tested
Leybold WS1001/WS-1001 RUVAC Roots Blower/Booster Pump
LEYBOLD TRIVAC D60A ROTARY VANE VACUUM PUMP REFURBISHED
Leybold WS151 Roots Blower Vacuum Pump 108.0 CFM
LH Leybold DRYVAC Controller ThermoVac TM 22 Display+++
LEYBOLD HERAEUS 013-58-021-939 USPP 01358021939
Leybold Oerlikon Heraeus RUVAC WA250 Roots Vacuum Pump
Oerlikon Leybold WA-251 Vacuum Blower Rebuilt 1 yr wrty
Leybold Turbovac Mod. 150/Mod. NT 150/360 controller
Leybold 361 Turbo Pump/Controller/Cable
Leybold Heraeus 40 BCS Fomblin Prepped Roughing Pump
Leybold Sogevac SV40Bi Vacuum Pump: SV 40 Rebuilt SV40
Oerlikon Leybold TMP 50 Vacuum Turbo Pump: Rebuilt
