time and date problem

[alvis]

hi all, good day to you... im new with plc program, and im facing some problem... im using gx-work 2 (simple project ladder type) , Q00cpu 1st- how should i create a ladder for time , date (according to real time) ? - switching on every 8am - 11pm? switching off every 11.00pm -8am? 2nd-i have a input module (aj65sbt-64ad) on station 3, connect to 2 diffrent pressure transmitter.(4-20mA) i want to get the averange of the pressure and control the (VSD). Edited February 28, 2014 by alvis

[kaare_t]

You say you use simple project, but which language do you use in GW2 (simple ladder or structured ladder)??

[alvis]

im using ladder.

[kaare_t]

You can find clock data in SD1025, SD1026 SD1027 (see picture). In ladder you can compare the minute and hour value against the desired on/off datetime to determine if the output should be on or off (e.g. with >= / <= - LessThan and GreaterThan instructions). To get the average of two inputs, simply add them (+), then divide them by two (/) to get the mean sum.

[alvis]

i try it , and im still confuse...don't know how to work this out Can u please show me some example? :clap:

[alvis]

is this programm work? or have any other way to make it?

[kaare_t]

I think that should work for the clock, but skip the DMOV in line 3 and replace it with a regular MOV.

[alvis]

okay , thx u very much kaare_t :clap:

[kaare_t]

No problem, let us know if you run into any issues during the programming. Also; you know you can simulate the program without the PLC in hand right? By going to "Debug -> Sart/Stop Simulation"...

[alvis]

yup i know about the testing function.... but i never on site before...this is my 1st project... still have alot unknow problem facing on later .... thanks u agains.!! :notworthy: