gaannesh

Hi I have a rubber molding machine in that there is digital temperature  controllers  and one unit showing CJE as error and i found at the back there is glass diode like thing got burned. It looks like zener diode with marking at one end and i connected new zenor diode of 5v and still the problem is there . I would like to know is it Zenor diode or thermister? Its one end is connected at thermocouple terminal and other at another terminal.      

What voltage are the I/O cards Voltage is 24VDC

I am new to PLC, and have been called to attend the injection molding machine. (CINCINATTI MILCARON) .VICKERS rack PLC I noticed their personal by mistake connected the input wires to the output cards and output wires to the input card. I changed to its original connection. Now the problem is when power given to the output card fuse blows. i want to know what might have happened. IS the Cards need to be repaired /or replaced? Tommorow i goes there again so i prepare myself.

Member Join Date: Jan 2007Local Time is: 04:08 PM Location: shjPosts: 0 s7 200 hello i have form fill packing machine with the s7 224 plc and proface HMI. all the time parameters are set in the HMI according to the packaging size So far from the beginning when we stop the machine for a week all the timer values in the hmi becomes 0000. all timer values are stored in v memory . how to prevent this problem of not losing the v memory data. because everytime we restart the machine i have to re enter all the values again, almost 25 time values.