每–次扫描控制器通讯窗口出现一次。因为在PACSystem中，扫描时间最多可达2.5s，所以处理一-个RTU请求的时间最多是:2.5s。另一个因素是硬件配置允许的控制器通讯窗口时间。如果配置的是-个非常小的控制器通讯窗口，RTU请求可能一-次扫描完成不了，导致RTU处理需要多个扫描周期。详情查阅第5章“CPU窗口模式”。

PC Board with Transformer 162-1701-001 #20862

Circuit Board ST-002(A) #21120

Rexroth Hydraulic R150254086 AAP12 #29624

Hauck Air Flow Valve 4″ Inlet / Outlet #2638

Allen Bradley Output Module 1771-OA, #13151

Conair Franklin Air Cylinder 6061-T6 #15625

Conair Franklin Seamless Air Cylinder WW-T-700 #15626

Conair Franklin Air Cylinder 290-446-02 #15628

Conair Franklin Air Cylinder 290-446-02 #15629

Conair Franklin Air Cylinder 290-446-02 #15630

Fanuc Module A03B-0807-C159 #7549

GE Fanuc Card IC600BF904K #7801

Allen Bradley Relay 700-RT00N000A1, Series B #31112

Weidmuller Card Stand SKHE 96, 410723 #31859

Yuken Pressure Control Valve HCG-06-C1-P-220?9 #38429

Sheffer Cylinder 2.5″ Stroke, 1/2 AA 2 1/2 #32327

Gardner Denver Inline Nutsetter H10RAT12ATS #15296

Daykin Transformer DTFP-0705-A572, 3.2 Amps, #6305

Triple Shield Proximity Sensor HJO 772683 #16377

Toshiba Circuit Board H093640, #6912

Underwriters Laboratories Transformer B-5168 #29619