Mitsubishi FXos-20MR-ES PLC

Hypersonic · #1 (**permalink**) 11-30-2008, 09:48 AM

Hi Guys.
I'm new to this site and the world of automation!
However I'm reasonably saavy with digital control (in general) and on a crash course to try to resolve some issues on some machines I have purchased.
I have two VERY basic questions which I haven't (yet) been able to resolve from the comfort of my study without the advantage of the machines in front of me.

On the above controller their is an Input marked S/S. What is this for please?

In addition the outputs are marked Y0, Y1 etc as you would expect but there are also COM1, COM2 etc. There are more Y's than COM's.
A few words of explanation would be appreciated.
I assume, maybe incorrectly, that all the COM's are all linked and that an assumption exists that fewer such connections are required. WHY?

rkautomation · #2 (**permalink**) 03-22-2009, 09:30 AM

Hi Hypersonic,
I think input marked S/S is Slector Switch.
COM is common.
Hope this will help.

Den Mark · #3 (**permalink**) 05-04-2009, 12:31 PM

S/S means "source/sink"

thru this, you can select if input is PNP or NPN

hd86 · #4 (**permalink**) 06-25-2009, 09:39 PM

its source /sink so you should the input if it PNP transistor or NPN.

maclorenza · #5 (**permalink**) 11-04-2009, 06:26 PM

S/S is common Input PLC,
S/S Connect to DC + or DC - , if DC Input Type
S/S Connect to AC , if AC Input type

lagevardi · #6 (**permalink**) 12-25-2009, 04:12 PM

dear hypersonic ihave question my plc is correct but itsnt turn on we have 220v now i want to know what is voltage on port xo and if i short between +24 and x3 and x5 and x7 for check does it have problem or not

lagevardi · #7 (**permalink**) 12-25-2009, 04:15 PM

dear mitsubishi ihave question my plc is correct but itsnt turn on we have 220v now i want to know what is voltage on port xo and if i short between +24 and x3 and x5 and x7 for check does it have problem or not

Rigsby · #8 (**permalink**) 02-01-2010, 09:46 PM

Hi Hypersonic,
As mentioned above the S/S is to select what type of inputs you are using, normally you connect S/S to 0v and then inputs are high or on when you apply 24v. Connecting to S/S to 24v selects sink mode and your inputs would need to pull down to 0v to make them high or on.
The Com connectors are just the common poles of the relay outputs, the particular model of PLC you have probably lets you have only two seperate Com voltages i.e. you can have some 24v dc indicators off the first set of ouputs and maybe 110v ac solenoids on the second set of outputs. So in this example you would connect 24v dc to com1 and 110v ac to com2. If all of your outputs are 24v dc then you can connect com1 and com2 both to your 24v supply. The coms should not be already linked internally.