Siemens SINUMERIK 840Di Function Manual page 1338

Basic machine

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Detailed Description

2.12 Block descriptions

The function contains 3 input parameters (In1, In2, In3). On switchover of one of these

parameters to the value 0, the output Out0 is deactivated without delay and outputs Out1,

Out2 and Out3 deactivated via the parameterized timer values (parameters TimeValue1,

TimeValue2, TimeValue3). The outputs are activated again without delay, if inputs In1 to In3

take the value 1 and a positive edge change is detected at one of the acknowledgement

inputs Ack1, Ack2. To bring the outputs to their basic setting (values = 0) after booting, the

parameter FirstRun must be configured as follows. Parameter FirstRun must be switched to

the value TRUE via a retentive data (memory bit, bit in data block) on the first run after

control booting. The data can be preset, e.g., in OB 100. The parameter is reset to FALSE

when FB 10 is executed for the first time. Separate data must be used for parameter

FirstRun for each call with separate instance.

The corresponding NCK SPL block is described in:

/FBSI/ Description of Functions, Safety Integrated.

Simplified block diagram in CSF

The figure below shows only one acknowledgment input Ack1 and one delayed deactivation

output Out1. The circuit for Ack2 and the other delayed outputs are identical. The parameter

FirstRun is also missing in the function diagram. The mode of operation is described above.

PLC Basic Program Solution Line (P3 sl)

Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0

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