neerajpuranik
Member
I have a pouch packing machine having ML1500 PLC. It has got one additional output module 1769-OB16. The problem is one of its output is not working ( OUT1 ). According to program normally this output remains in ON state keeping sol. valve ON & every 6 cycles it switches off discharging a cylinder to facilitate cutting of six sachet chain.
For quite sometime this output is not operating the coil. When I checked it with multimeter it was showing 24V DC but as soon as I connect it to coil the voltage becomes dead 0 V. Obviously I checked the wiring for any short but did not find any problem with wiring. Even then I changed the total wiring between the output to coil but no improvement. After that I tried operating relay with it but even with relay coil the voltage is dropping to 11 V DC, not enough to operate it. The manufacturer has not used relay card with the output module so the output was directly connected to Sol. coil.
Is it possible the output is fried? Has anyone came across the same situation or I am doing any gross mistake in checking??????
Kindly advice
Thanks,
Neeraj
For quite sometime this output is not operating the coil. When I checked it with multimeter it was showing 24V DC but as soon as I connect it to coil the voltage becomes dead 0 V. Obviously I checked the wiring for any short but did not find any problem with wiring. Even then I changed the total wiring between the output to coil but no improvement. After that I tried operating relay with it but even with relay coil the voltage is dropping to 11 V DC, not enough to operate it. The manufacturer has not used relay card with the output module so the output was directly connected to Sol. coil.
Is it possible the output is fried? Has anyone came across the same situation or I am doing any gross mistake in checking??????
Kindly advice
Thanks,
Neeraj