Siemens S5 PLC instruction

cck · Jul 2, 2003

Hi,

Can anyone help me to interpret this line of command.

:C DB80
:L DW35
:FDG
:C DB121
:L DW36
:FDG
:XG
:L KG +2000000+08
::G

O =I-DB

NOTE :I-DB, is a user declaration.

I'm confused with the

O =I-DB, I check the instruction list
and it came out with 2 instruction, DO and DO=. I don't
know which one is used in the program?

Regards
cck

seppoalanen · Jul 2, 2003

cck said:

:C DB80 ;open DB80
:L DW35 ;load DW35 to accu
:FDG ; code conversion from fixed (accu) to fload (accu)
:C DB121 ; open DB121
:L DW36 ; load DW36 to accu1, (accu1 goes to accu2)
:FDG ; as earlier
:XG ; accu1 * accu2 to accu1
:L KG +2000000+08 ; load to accu1, accu1 goes to accu2
::G ;divide
: DO =I-DB ;indirect operation for next command (= use formal operand named: I-DB)

Siemens S5 PLC instruction

cck

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seppoalanen

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