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Siemens SIMATIC S5 User Manual

Siemens SIMATIC S5
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STEP 5 Operations Manual S5-115F
Conditional Block Call ”JC”
One block is called within another block when the previous condition has been satisfied
(RLO=”1”).
In the case of jump operations to missing blocks, the operating system of the CPU 942-7UF12
responds differently depending on the operating mode.
• If a jump is called to a missing block in safety mode, the S5-115F stops.
• If a jump is called to a missing block in test mode, the jump is not executed and the program
processes the next operation. The S5-115F remains in RUN.
For this reason, construction of the complete user program step by step by successively loading
of blocks is possible without continually rewriting OB 1. It is therefore possible to program
OB 1 with all planned block calls.
Example: A special function has been programmed in FB 63. It is called and processed under
certain conditions, e.g. in PB 10.
FB 63
STL
.
.
.
S F 10.0
A I 31.7
JC FB 63
.
The ”JC FB 63” statement in program
block PB 10 calls function block FB 63
if input I 31.7 is ”1”.
ExplanationProgram Sequence
A I 31.7
PB 10
JC FB 63
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3-34
EWA 4NEB 811 6149-02

Table of Contents

Other manuals for Siemens SIMATIC S5

Preview: Equipment Manual
Equipment Manual197 pages
Preview: Operating Instructions
Operating Instructions43 pages
Preview: Instructions
Instructions40 pages

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Siemens SIMATIC S5 Specifications

General IconGeneral
Product type designationSIMATIC S5
Programming languageSTEP 5
Digital inputsVaries by model
Digital outputsVaries by model
Analog inputsVaries by model
Analog outputsVaries by model
Supply voltage24V DC
CPU TypeVaries by model
MemoryVaries by model
Digital I/OVaries by model
Analog I/OVaries by model
CommunicationPROFIBUS
Operating Temperature0°C to 60°C
Relative Humidity5% to 95% (non-condensing)

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