plc程序设计及工作过程分析
启动操作：按下启动按钮SB1，I0.0的动合触点闭合，M10.0产生启动脉冲，M10.0的动合触点闭合，使Q0.0保持接通，液体A电磁阀YV1打开，液体A流入容器。当液面上升到SL3时，虽然I0.4动合触点接通，但没有引起输出动作。当液面上升到SL2位置时，SL2接通，I0.3的动合触点接通，M10.3产生脉冲，M10.3的动合触点接通一个扫描周期，复位指令R Q0.0使Q0.0线圈断开，YV1电磁阀关闭，液体A停止流入；与此同时，M10.3的动合触点接通一个扫描周期，保持操作指令S Q0.1使Q0.1线圈接通，液体B电磁阀YV2打开，液体B流入。
当液面上升到SL1时，SL1接通，M10.2产生脉冲，M10.2动合触点闭合，使Q0.1线圈断开，YV2关闭，液体B停止注入，M10.2动合触点闭合，Q0.3线圈接通，搅匀电机工作，开始搅动。搅动电机工作时，Q0.3的动合触点闭合，启动定时器T37，过了6秒，T37动合触点闭合，Q0.3线圈断开，电机停止搅动。当搅匀电机由接通变为断开时，使M11.2产生一个扫描周期的脉冲，M11.2的动合触点闭合，Q0.2线圈接通，混合液电磁阀YV3打开，开始放混合液。
液面下降到SL3，液面传感器SL3由接通变为断开，使M11.0动合触点接通一个扫描周期，M20.1线圈接通，T1开始工作，2秒后混合液流完，T1动合触点闭合，Q0.2线圈断开，电磁阀YV3关闭。同时T1的动合触点闭合，Q0.0线圈接通，YV1打开，液体A流入，开始下一循环。
停止操作：按下停止按钮SB2，I0.1的动合触点接通，M10.1产生停止脉冲，使M20.0线圈复位断开，M20.0动合触点断开，在当前的混合操作处理完毕后，使Q0.0不能再接通，即停止操作。
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Ericsson ROF 137 5339/11 R7G 01W08 ELU29
Festo SEC-AC-305 192328 NN
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VMIC VMIVME 1150 VMIVME-1150 332-001150-120-?J
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Advantech PCA-6753F-G0A2 GX1-300 & PCM-3730 rev. A1
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Leitz NPL FLUOTAR ∞/0 100x/0.90
Galil DMC-1780 rev D & CB 50-100
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Arburg ARB 770 with ARB 735 mounted
ASM 02-81227-01 QUAD STEP X-ELEV S03-28690
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Gildemeister 0.865.213-1 DI64
Zygo 7006A & 7003A & 7024A
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Coherent front panel for Vector 1064-750-01
Coherent AVIA head bd assy 0171-703-00 rev. C1
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Siemens S42024-D5004-A1?00-5 IPU16
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Monovolt CPT 4 160 183 PU 04
Nicolet 000-879903 EC01000/EDGE PROFILER MK2
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Shimadzu board 501-72536E assy 501-72535C
Shimadzu board 501-72536D assy 501-72535B
Shimadzu board 501-69697D assy 501-69696D
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Kristler-Morse sonoflow 5200 board
NSK ESA ESA-LYA2AFJ-20
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HP E2251A M-MODULE with Alfautomazione M1010 & M1012
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