Siemens STL help needed

[mike_l]

Hi All,
I am a ladder programmer but I have to reverse engineer some STL code. I can't figure out this part. Can anyone help me translate this? Thanks..

L "GEN CTRL CMDS".DIS_MODE_DISSOLV DB504.DBW46
L 8
==I
= L 26.0
A L 26.0
BLD 102
L "DENSTY_TO" MW18
SD "DIS_DNS_TO" T14
A L 26.0
A "DIS_DNS_TO" T14
= L 26.1
A L 26.1
A(
L "P2H AI".AI_F0010 DB202.DBD392
L "PROCESS_SP".SP2478 DB505.DBD712
>R
)
S "ALARMS COMMON".Common_Alarm4_6 DB53.DBX4.6
A L 26.1
A(
L "P2H AI".AI_F0010 DB202.DBD392
L "PROCESS_SP".SP2477 DB505.DBD708
<R
)
S "ALARMS COMMON".Common_Alarm4_5 DB53.DBX4.5

Specifically I do not understand the [= L 26.0, A L 26.0] lines.
I need to convert this to ladder. Thanks for any help.
Mike

 

[Bratt]

The code is translatable to ladder. You probably have the wrong type (HEX instead of INT or similar) on one or more addresses. You could try to disable the type check and switch from STL/LAD this is however a good check to have if you are a beginner.

 

[Bratt]

The L bits are bits in the tempstack added by the compiler when you program in lad or fbd so this network is most likely created in lad or fbd originally

 

[L D[AR2P#0.0]]

Re-post in absolute address format rather than symbolic.

 

[mike_l]

The code is translatable to ladder. You probably have the wrong type (HEX instead of INT or similar) on one or more addresses. You could try to disable the type check and switch from STL/LAD this is however a good check to have if you are a beginner.

View attachment 37918

That did it! Thank you so much!
I was wondering why half the code was ladder and half STL!

Mike

 

[JesperMP]

The real fix is to set the symbol types correctly.

"GEN CTRL CMDS".DIS_MODE_DISSOLV (DB504.DBW46)
should be an INT.

"GEN CTRL CMDS".DIS_MODE_DISSOLV (DB504.DBW46),
"PROCESS_SP".SP2478 (DB505.DBD712) and
"PROCESS_SP".SP2477 (DB505.DBD708)
should be REALs.