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Old December 30th, 2017, 11:33 AM   #1
MRM
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S5-95U analog output

I m new in STEP 5 and i need help
I have problem with the onboard's analog output 4-20mA, i want to forced it to see if it work or not but i didn't find the assignement in S5 Program. As i know, normally it's in FB251( XE)
:
SPA FB 251
NAME: RLG:AA
XE : MW 12
BG : KF +8
KNKT: KY 0,0
OGR : KF +1000
UGR : KF +0
FEH : M 2.1
BU : M 2.2
***
i forced MW 12 but no signal!!
Please i need help
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Old December 30th, 2017, 11:40 AM   #2
JRW
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Is there a qwxxx or awxxx somewhere?
Maybe you can track that back to this call
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Old December 30th, 2017, 11:48 AM   #3
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i checked the assignement list now there is no AW or QW, all are memory assignement or digital I/O
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Old December 30th, 2017, 12:01 PM   #4
MRM
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MW 12 used only on this
SPA FB 251
NAME: RLG:AA
XE : MW 12
BG : KF +8
KNKT: KY 0,0
OGR : KF +1000
UGR : KF +0
FEH : M 2.1
BU : M 2.2
***

A DB 20
L DW 48
T MW 10

A DB 21
L DW 48
T MW 12

A DB 22
L DW 48
T MW 14
BE
***************************
one is onboard analog output and the other two are for the external analog module
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Old December 30th, 2017, 01:36 PM   #5
moggie
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The analog output is normally QW40.
Monitor this value directly and then "force" MW12 (dont forget to block the existing T MW12)
Attached Images
File Type: png S5_95 Analog.PNG (63.4 KB, 29 views)

Last edited by moggie; December 30th, 2017 at 01:58 PM.
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Old December 30th, 2017, 01:45 PM   #6
JRW
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Moggie
For a quick test... could he raise UGR to a 1000?
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Old December 30th, 2017, 02:06 PM   #7
moggie
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JRW
That is possible and the error bit(s) will come on as well
Without the program not sure if these error bits are used to indicate faults, stop the machine etc.........

Last edited by moggie; December 30th, 2017 at 02:09 PM.
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Old December 30th, 2017, 03:44 PM   #8
MRM
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I tried L KF +500
when I measured the output, I found -74 mA
can you told me what is the problem ? and what i have to do ?
thank you very much in advance for your help
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Old January 1st, 2018, 12:38 PM   #9
ivo.maenen
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Did you connect pin 15 (M) and pin 10 (+QI)?

The manual says it is 0-20 mA.
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