Infranor SMT-BD2, Руководство пользователя

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SMT-BD2
2.9 - "COUNTING"
FAULT
For the "TTL incermental encoder" configuration:
ƒ Check that the encoder signal jumpers COD are correctly set (position B1).
ƒ Check for the correct encoder supply voltage value
ƒ Check for the correct encoder-amplifier-motor ground and shield connections with regard to the
recommendations of
chapter 4 .
ƒ Check for the correct encoder A channel, B channel and Z marker signal waveforms
A
A/
B
B/
Z
Z/
A
A/
B
B/
Z
Z/
Forward direction
Reverse direction
ƒ Check that the following condition are answered for taking into account the maximum value of the encoder
pulse frequency at the maximum motor speed value :
Max. motor speed (rpm) < 60 x 10
6
/ Number of encoder pulses per revolution
Max. motor speed (rpm) < 60 x Encoder pulse frequency limit (Hz) / Number of encoder pulses per revolution
ƒ Check that the Motor encoder resolution parameter value is correct.
ƒ Check that the number of encoder pulses between two successive Z marker pulses is an entire multiple of the
Motor encoder resolution value. If this condition is not fulfilled, the encoder counting protection must be
disabled in order to cancel the "Counting" fault. The encoder counting protection can be disabled by disabling
the encoder marker pulse by means of the ZM jumper (
see section 2.8 "Encoder fault " ).
!
The encoder counting protection is checking that the encoder pulses count value between two
successive Z marker pulses is an entire multiple of the
Motor encoder resolution value. When the
encoder counting protection has been disabled, the amplifier is only checking that the encoder pulses
frequency is lower than 1.5 times the maximum encoder frequency. The maximum encoder frequency
is calculated into the amplifier according to the
Motor encoder resolution parameter value and the
Maximum speed parameter value. In this case, encoder pulse noise at a frequency lower than 1.5
times the maximum encoder frequency may involve uncontrolled motor movements that may be
dangerous for operator and machine.
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Chapter 7 – Fault finding