a small program for S7-300

tulip · Nov 11, 2008

I want to write a program for S7-300 Plc.

Plc side: OP side
------------------------------------
DB254.DBB63=+15-----------> -1
DB254.DBB65=+14-----------> -2
DB254.DBB67=+13-----------> -3
DB254.DBB69=+12-----------> -4
DB254.DBB71=+11-----------> -5
DB254.DBB73=+10-----------> -6
DB254.DBB75=+9------------> -7
DB254.DBB77=+8------------> +8
DB254.DBB79=+7------------> +7
DB254.DBB81=+6------------> +6
DB254.DBB83=+5------------> +5
DB254.DBB85=+4------------> +4
DB254.DBB87=+3------------> +3
DB254.DBB89=+2------------> +2
DB254.DBB91=+1------------> +1
DB254.DBB93=+0------------> +0
That is -1 between +8 any values write on OP ,When we look DW's,it will shown like this format...
Thanks advance..

tulip · Nov 12, 2008

is there any help?

jvdcande · Nov 12, 2008

If it was clear to me

what you want to accomplish
what you already have

then I would be happy to help. Now you're question is so wide open, I don't dare to start.

Regards,

PeterW · Nov 12, 2008

tulip said:
I want to write a program for S7-300 Plc.

Plc side: OP side
------------------------------------
DB254.DBB63=+15-----------> -1
DB254.DBB65=+14-----------> -2
DB254.DBB67=+13-----------> -3
DB254.DBB69=+12-----------> -4
DB254.DBB71=+11-----------> -5
DB254.DBB73=+10-----------> -6
DB254.DBB75=+9------------> -7
DB254.DBB77=+8------------> +8
DB254.DBB79=+7------------> +7
DB254.DBB81=+6------------> +6
DB254.DBB83=+5------------> +5
DB254.DBB85=+4------------> +4
DB254.DBB87=+3------------> +3
DB254.DBB89=+2------------> +2
DB254.DBB91=+1------------> +1
DB254.DBB93=+0------------> +0
That is -1 between +8 any values write on OP ,When we look DW's,it will shown like this format...
Thanks advance..

Like jvd I looked earlier but could not work out what your asking.

You have a tag on the OP, where you write a value between the range of -7 to +8, if the value is -1 you want to write +15 into DB254.DBB63 ??? Is this correct ???

Have no idea really.

tulip · Nov 13, 2008

Yes correct.I convert s5 program to s7 .Customer used no name a operator panel.This panel communicate digital output modules of s5 plc .I use protool for op.When I look to old op's screen ( noname) I see ''-1'',When I look to plc side is showing +15,etc...
Another question: How can I see -7 between +8 values on protool screen (I/O tag assignment )?.Thanks for your efforts....

Madman · Nov 14, 2008

L "OP_TAG"
T #temp0

L "OP_TAG"
L L#0
<D
JNB j000
L L#16
L "OP_TAG"
+D
T #temp0
j000: NOP 0

L #temp0
L L#2
*D
T #temp1
L L#93
L #temp1
-D
SLD 3
T #temp1
LAR1
OPN DB 254
L #temp0
T DBB [AR1,P#0.0]

"OP_TAG", #temp0, #temp1 - variables in DINT format

a small program for S7-300

tulip

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tulip

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jvdcande

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PeterW

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tulip

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Madman

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