Dynalco SWT-2000 Speed Switch/Speed Transmitter - Manual (Page 30)

Operating Instructions SWT-2000 DYNALCO
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7.2.2 Signal Failure
Signal failure is defined as the sudden transition from an input frequency to no further recognisable pulses.
The frequency is then calculated as follows:
n t
f
×
=
t Measuremen
1
n: the number of measurement intervals without an input signal
The measured speed thereby follows an exponential function to the minimum frequency (0.025Hz) and then
falls to zero.
7.3 Functions
7.3.1 “FUNC” Push Button
The front panel “FUNC“ button is OR ed with binary input B1. Pushing this button executes the B1 function.
7.3.2 Parameter Sets A, B, C and D
The binary inputs must be used to change parameter sets. To configure binary inputs see paragraph 6.7.2.
Binary input configur.
Binary input configuration
Status
BIN 1
Status
BIN 2
Selected
Parameter set
0 X A
Binary input 1 to
Binary input 2 not to parameter set selection
1 X B
X 0 C
Binary input 1 not to parameter set selection
Binary input 2 to
X 1 D
0 0 A
0 1 B
1 0 C
Binary input 1 to and
Binary input 2 to
1 1 D
For delay in switching between Parameter sets B and A see Paragraph 6.7.13 Change-over delay.
7.3.3 Limits
User defined upper and lower limits allow wide or narrow hysteresis to be set. Unless otherwise required we
recommend a hysteresis of 10%.