ICTS-Test of Holding Relay Timer

Today we installed the PLC panel box at actual conveyor and did the test run. It works well in lab so we were hoping that all went well too at production line. However, a few problems arised that require further attention and additional work. They are:

1- Sachet cutter proximity switch.
I thought it is a NPN type. So I did the PLC wiring as NPN where the output is used to trigger the ground relay. However it was discovered that it is PNP type. So the relay cannot be turn on. First I thought the relay got problem. Thus I tried to replaced it with the new one I purchased from Keyence. Unfortunately it was found that the new proximity sensor is too short about 40% of the existed proximity switch. Due to this stupid mistake by Keyence salesman, tomorrow I will call to ***k him upside down for supplying wrong device and will ask him to resend the proper one. Later upon checking and discovered that it is due to the NPN /PNP problem, hence I did rewiring for relay #7 so that it would be triggered by PNP sensor. OK and the problem is settled.

2- Delay timer
Since I don't have second device for testing so I put on 0.6s as delay timer. It was found later on that its too long. Next I tried to changed the timing usinng the old P2 IBM thinkpad. However the laptop was too old to do the job. So I have to dismantled the wiring for the panel and bring the panel back to the lab just the reload the program for 0.3s. It works better. However for best result later on I will create another program so that the user can select the timing by selecting the proper switches.

3- Computer
As the program changes will be troublesome using the desktop PC, Mr YU TT request to get a quotation for a laptop so that it is more proper and on the same time it can be used for USB robotic project as well.