| 摘要 |
PURPOSE:To early discover the abnormal state of a production stage by detecting the storing the command signal outputted to a work device and the motion signal outputted from the work device and comparing and studying the signal selectively taken out in the storing order from the memory part. CONSTITUTION:A working start command signal is transmitted to a loader control part 3 and the working is started by detecting it by a detection part 31 and storing it in a memory part 33. The signal concerning the motion instruction of each stage of the descent of the vacuum lifter 43 from the loader control part 3 and the descent time, the suction of a vacuum pad 45 and the suction time, etc. is detected by a detection part 19 and stored. The motion signal showing the actual work time of each stage is detected by the detection part 19 and stored as well. When the memory of the detection part 19 becomes in >= the capacity, a stored signal is fed to a memory part 25 and stored. The motion state of each stage is checked by outputting the signal stored in the memory part 25 to CRT 35. With the device of this composition the stage abnormality can early be discovered.
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