Strobe-Dependent Inputs (Di.17; Strobe-Dependent Inputs - KEB COMBIVERT F4-F Applications Manual

Functional Description
6.3.7 Strobe-
Dependent Inputs
(di.17...di.19)
Which inputs are actuated by
strobe?
Where is the strobe signal
coming from?
di.17 Strobe-dependent inputs
di.18 Selection of strobe signal
Edge-active or static strobe?
di.19 Strobe-mode
Chapter Section Page
6 3 6
In most cases the strobe signal is used to trigger the input signals. For example, two
inputs shall serve for the parameter set selection. But the signals for the actuation do
not come equally, so for a short time the changeover to an unintended set would take
place. At active strobe the actual input signals of the strobe-dependent inputs are
accepted and maintained until the next scanning.
With di.17 every input can be selected as strobe-dependent input. For the control
release di.17 has no effect, as it is a static input.
With parameter di.18 every input can be adjusted as strobe input in addition to its
programmable function. If several inputs are adjusted as strobe they are OR-operated.
At the next rising edge from the program cycle the strobe signal is triggered.
Terminal Name
X2.1 ST
X2.2 I4
X2.3 I5
X2.4 I6
X2.5 I1
X2.6 I2
X2.7 I3
- IA
- IB
- IC
- ID
As a standard the strobe is edge-active, i.e. the input states are accepted with the
rising edge and maintained until the next edge. In some cases, however, it may be
sensible to use the strobe in a manner of a Gate-function. In such cases the strobe
signal is static, i.e. the input signals are accepted for as long as the strobe signal is
set.
Parameter Setting Range
di.19
Fig. 6.3.7.a Edge-active strobe
program cycle
Strobe input
resultant
strobe signal
Terminal status
Input status
Date Name: Basis
02.03.99
KEB COMBIVERT F4-F
Function
control release
prog. input 4
prog. input 5
prog. input 6
prog. input 1
prog. input 2
prog. input 3
internal input A
internal input B
internal input C
internal input D
Function
0 edge-active strobe (see Fig. 6.3.7.a)
1 static strobe (see Fig. 6.3.7.b)
2ms
Digital In- and Outputs
Decimal Values di.17 and di.18
1 (without function)
2
4
8
16
32
64
256
512
1024
2048
© KEB Antriebstechnik, 1999
All Rights reserved
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