Using HOURM as Retentive Counter

[Levent1970 2]

Hello Guys, 

is someone using HOURM as a Retentive Counter ? I Tried it but i have no success.

like this one:

HOURM( Betriebsstundenzaehler_ein , 700, Betriebsstundenzaehler , Platzhalter1 );

I'm using FX5U.

Our old Programm was written in Ladder.

 

 

Edited 15 Mar 2021 by Levent1970

[AndreasW 21]

Hello Levent,

this should work, but make sure that you reserve space for two 16bit devices, as d1 and also d1+1 are used, as described in the processing details on page 793 of the FX5 Programming manual (https://dl.mitsubishielectric.com/dl/fa/document/manual/plcf/jy997d55801/jy997d55801r.pdf)

you should have a look at the declaration of the label 'Betriebsstundenzaehler', either assign a latched 16bit device (if declraed als global label) or
set it to be an array of 2 elements if specified as a local label. In the second case you should use 'Betriebsstunndenzaehler[0]' for d1.

Also you should be sure to handle the case, that the maximum 16bit value is reached witch will happen after about 7.5 years (65535/ (360days x 24h)), this is the reason we
normaly don't use the 'hour_m' function and implement the operating hour counter by ourselve using an unsigned double word (32bit).
 

hope this helps