retentive db problem

seee · Oct 18, 2012

hello.

i have cpu 315-2ag10-0ab0 and after power off and on the actual value of the data block become zero.
This cpu has mmc and as far as i know all of dbs should be retentive by default.

what is the problem?

best regards.

L D[AR2P#0.0] · Oct 18, 2012

What do the block properties show?

seee · Oct 19, 2012

hello.
thanks a lot for your reply.
db properties is like the image which you have attached.
non retain has not been enabled.
in cpu properties,retentive tab i set mb0 to mb30 as retentive but after power on/off
the cpu, all memory bytes become zero.
i mean that in the cpu i don't have any retentive db,mb.
please help me.
best regards.

L D[AR2P#0.0] · Oct 19, 2012

What happens to the DB contents if you put the plc into stop and then run?

uptown47 · Oct 19, 2012

Do you have an OB100 or OB101 or OB102 that is resetting bits upon warm/cold restarts ?

seee · Oct 19, 2012

After power off and then power on the cpu all dbs actual values become zero.
cpu has mmc card and it should retain actual values but it doesn't retain.
(i set zero value on initial value of dbs).

there isn't ob100,ob101,ob102 in the program.

L D[AR2P#0.0] · Oct 19, 2012

and the answer to the question in post#4 is......

seee · Oct 20, 2012

thank you very much for your help.
please excuse me because i took your precious time.
it was my programming mistake and i solved it.

best regards.

retentive db problem

seee

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L D[AR2P#0.0]

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seee

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L D[AR2P#0.0]

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uptown47

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seee

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L D[AR2P#0.0]

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seee

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