S7-300 alarm buffer

exmore84 · Apr 10, 2011

Dear members

I need in step 7 a alarm buffer. I made a little progam (See below) but it doesn't work. So if i get a alarm in DB110.DBW84 and M100.0 is set the alarm is transfering to DB1.DBW0.
When there is a new alarm and M100.0 is set to one, the data in DB1.DBW0 is transfered to DB1.DBW2 and the new alarm is Transferred to DB1.DBW0. I test the program in S7Sim but it doesn't work. Do someone know the problem?

A M100.0
OPN DB 1
L DBW 6
T DBW 8
L DBW 4
T DBW 6
L DBW 2
T DBW 4
L DBW 0
T DBD 2
L DB110.DBW84 <== This is a db with my alarms.
T DBW 0

KalleOlsen · Apr 10, 2011

If I understand you correctly, you want this only to happen only every time M100.0 shifts from 0 to 1.

A M100.0
FP M100.1 // Shift only on positive edge
JCN L001
OPN DB 1
L DBW 6
T DBW 8
L DBW 4
T DBW 6
L DBW 2
T DBW 4
L DBW 0
T DBD 2
L DB110.DBW84 <== This is a db with my alarms.
T DBW 0
L001: NOP 0

Kalle

TurpoUrpo · Apr 10, 2011

Loads and transfers are executed without regard to RLO. You need to use conditional jump to avoid execution of loads and transfers.

Edit: Kalle beat me to it.

exmore84 · Apr 10, 2011

Haha lol. Thanks, i'm gonna test this. Thank you verry mutch, also you TurpoUrpo

...

exmore84 · Apr 10, 2011

Yes yes it's working. But i've changed the opn DB1. If i use this OPN instruction it doesn't work. Is this maybe because the S7sim?

A M100.0
FP M100.1 // Shift only on positive edge
JCN L001
L DB1.DBW 6
T DB1.DBW 8
L DB1.DBW 4
T DB1.DBW 6
L DB1.DBW 2
T DB1.DBW 4
L DB1.DBW 0
T DB1.DBD 2
L DB110.DBW84 <== This is a db with my alarms.
T DB1.DBW 0
L001: NOP 0

Thanks by the way. It's a problem lesser in my project. Now i've still got one problem

in winCC

L D[AR2P#0.0] · Apr 10, 2011

Here is the modification required to "make it work"

Code:

[FONT=Arial]A M100.0[/FONT]
[FONT=Arial][COLOR=red]FP M100.1 // Shift only on positive edge[/COLOR][/FONT]
[FONT=Arial][COLOR=red]JCN L001[/COLOR][/FONT]
[FONT=Arial]OPN DB 1[/FONT]
[FONT=Arial]L DBW 6[/FONT]
[FONT=Arial]T DBW 8[/FONT]
[FONT=Arial]L DBW 4[/FONT]
[FONT=Arial]T DBW 6[/FONT]
[FONT=Arial]L DBW 2[/FONT]
[FONT=Arial]T DBW 4[/FONT]
[FONT=Arial]L DBW 0[/FONT]
[FONT=Arial]T DBD 2[/FONT]
[FONT=Arial]L DB110.DBW84 <== This is a db with my alarms.[/FONT]
[I][B][FONT=Arial]T DB1.DBW 0[/FONT][/B][/I]
[FONT=Arial][COLOR=red]L001: NOP 0

[/COLOR][/FONT]L DB110.DBW84 actually executes as

OPN DB110
L DBW84

exmore84 · Apr 10, 2011

Oké thanks... Do somebody know's something about wincc flexible 2008?

L D[AR2P#0.0] · Apr 10, 2011

Start a new thread describing your problem and you will soon find out.

exmore84 · Apr 10, 2011

I already did

S7-300 alarm buffer

exmore84

Member

KalleOlsen

Member

TurpoUrpo

Lifetime Supporting Member

exmore84

Member

exmore84

Member

L D[AR2P#0.0]

Lifetime Supporting Member

exmore84

Member

L D[AR2P#0.0]

Lifetime Supporting Member

exmore84

Member

Similar Topics