MicroLogix1000 and RTC (Real Time Clock)

[Eoghan]

Hello.
Am updating an old ML-1000 processor's program.
It's type Bul 1761
My RSlogix500 says that this processor does not support the 'RTC' command.

Is this really true OR is there any other way I can get the RTC info into the PLC program for this processor?

Thanks.
E

 

[Mickey]

Create your own RTC with timers, counters and integers.

Timer 1 ( self-resetting) with a 3600 second preset, when done increment a counter then move that value to an integer call it hours. Reset counter it at 24.

Timer 2 (self-resetting) with a 60 second preset, when done increment a counter then move that value to an integer call it minutes. Reset counter at 60.

Use timer 2's .ACC value moved to an integer as your second value.

Be advised PLC timers are not very accurate.

Or why not upgrade to a ML1100 that does support a RTC.

 

[Eoghan]

Hello Mickey.
Thanks for reply.
WIll male the hours / minute counter through timers.
Application is already working on ML1000 and the additional functionality I want doesn't justify the cost of an upgrade to ML1100