如果这个COMM_ _REQ由于某种原因失败，没有数据被送回到输入数据区。从内部输入缓冲器读出的数据保留，可以被后面的读请求检索到。这个功能使字符从指定端口被读，直到指定的结東字符被接收。把从内部输入缓冲器读到字符放入指定输入数据区域。该功能送回检索到的字符数和输入缓冲器中仍未处理的字符数。如果请求输入字符数为0，那么只有输入缓冲器中未经处理的字符数被送回。
Allen Bradley 100-A60NZ*3 Starter #7064
Allen Bradley 1746-IV32 SLC 500 Input Module #21466
Cooper Connector Assembly Cable 5000135-73 Micro-Mi
Cooper Connector Assembly Cable 500135-69, Micro-Mi
General Electric Starter CR306B0 #33585
Allen Bradley AC Relay 700-NT200A1 #32968
MRC Steel Double Row Ball Bearings 5307CZZ #10795
SCC Notification Board Display CB-0800-300 #29094
Yuken Directional Valve DCG-03-2B3-4128 #13245
Allen Bradley Circuit Breaker 1492-GHD020 F #5351
Siemens Terminal Block 6ES5 490-7LB21 #22769
Reliance 0-51811-1 TSTB Board #23085
Festo Solenoid Valve MFH-5/3G-D-2-C #13218
Dynex Hydraulic Valve Z-42 2 5000 PSI #21707
Turck Inductive Sensor 4600640 #21618
GMF Robotics Input Module A03B-0801-C425 #11531
Fanuc IC693MDL741C Output Module #11352
Fanuc Output Module IC693MDL741D NEG Logic #11349
Chromalox PMF0011621 Digital Temprature Control #8521
Russellstoll Ever-Lock Plug 8354 #36888
Banner Omni Mini Beam Sensor OSBLVAG #31623
Siemens ITE Heavy Duty Vacu Break Switch F351 #21056
Allen Bradley Overload Relay 193-A1K3, 600V #25651
Yuken Valve DSHG-04-3C125-E?-D24 #13256
Bosch Directional Valve 9810231436 #13260
Box of 5 Allen Bradley Contact Kit 40410-331-54, 30
Barber Colman Keypad Input Driver A-13068 #25630
