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Parameterization
● Under unfavorable conditions, if the drive oscillates around the zero mark for one
revolution, a zero mark error can occur with the rough order of magnitude of the zero
mark width.
● This behavior can be avoided using the appropriate value of parameter p4686 "zero mark
minimum length". Parameter p4686 can be preassigned 3/4 of the zero mark width in
order to achieve the highest possible stable behavior. Parameter p4686 must be set less
than p0425 "Encoder, rotary zero mark distance".
● In order that the drive, for small inaccuracies, does not output fault F3x100 (N, A)
"Encoder x: Zero mark distance error"
distances can be set using p4680 "Zero mark monitoring tolerance permissible".
This parameter makes the system less sensitive to issuing fault F3x100
(no pole position adaptation) and p0437.2 = 0 (no pulse number correction for faults) are
set.
x = encoder number (x = 1, 2 or 3)
1)
9.3.25.7
Signal edge evaluation (1x, 4x)
The "signal edge evaluation" function allows squarewave encoders with higher production
tolerances or older encoders to be used. Using this function, a "steadier" speed actual value
is calculated for encoders with an uneven pulse duty factor of the encoder signals. This
means, that e.g. for plant/system modernizations and upgrades, existing motors together
with the encoders can be used.
Commissioning
The "Signal edge evaluation" with p0437.4 and p0437.5 is set as follows:
p0437.4
0
0
1
1
Principle of operation
● For the 4x evaluation, both the rising and falling edges of a contiguous pulse pair on the A
and B tracks are evaluated.
● For the 1x evaluation, only the first or the last edge of a contiguous pulse pair on the A
and B tracks are evaluated.
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
1)
p0437.5
Evaluation
0
4 x (factory setting)
1
Reserved
0
1 x
1
Reserved
Functions, monitoring and protective functions
, a permissible deviation of the zero mark
9.3 Drive functions
, if p0430.22 = 0
1)
593
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