Lenze i550-C0.25/120-1 - Acceptance

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STO
Fig. 14: Safety funcon STO
Funconal sequence and error response have no adjustable parameters.
Truth table
Safe input / channel Inverter Inverter status word CiA402 status word
SIA SIB Device status Bit 55 Bit 155 Object 0x6041, bit 15
LOW LOW STO acve 1 1 0
LOW HIGH
Impermissible state
1 0 0
HIGH LOW 1 0 0
HIGH HIGH Drive enabled 0 0 1
If the GS connecon is interrupted or in case of a short circuit/short circuit of GS
to SIA/SIB, STO is acve.
Acceptance
The machine manufacturer must check and prove the operability of the safety funcons used.
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The machine manufacturer must authorise a person with experse and knowledge of the
safety funcons to carry out the test.
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The test result of every safety funcon must be documented and signed by the inspector.
A complete test comprises the following:
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Documenng the plant including the safety funcons:
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Creang an overview screen of the plant.
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Describing the plant.
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Describing the safety equipment.
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Documenng the safety funcons used.
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Checking the funcon of the safety funcons used.
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Preparing the test report:
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Documenng the funconal test.
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Checking the parameters.
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Signing the test report.
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Preparing the appendix with test records:
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Protocols for the plant
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External recording
The tester must repeat the test aer each change and record the results in the
test report.
Product extensions
Funconal safety
Acceptance
236