52
SM-Universal Encoder Plus User Guide
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Issue Number: 6
In AB.L or FD.L modes (marker lock):
When a marker is detected by the input source (the drive or SM-Universal Encoder
Plus) the marker position based on the non-marker reset position is transferred within
500
µ
s.
The simulator reacts to this change in marker position in the next 250
µ
s period by
sending a marker out in the next 250
µ
s cycle at the same location in time within that
cycle as the incoming marker was into the source.
No pulses are discarded from the Ab/Fd outputs so that the relative speed delta is
always correct.
The device receiving the simulated signals can correct it's absolute position using the
marker to become synchronised with the simulation source.
Output initialisation
During power-up the source position may not be valid. The simulator will wait until the
position feedback source has been initialised before using the current position as the
stored last position. This in turn makes the initial output delta equal to zero during the
first simulator output cycle. As a result there will be no output pulses to move from zero
(the reset value of the stored last position) to the initial position of absolute encoder
sources. Once initialised the simulator will not stop even if the source device is re-
initialised or trips.
6.5.1
Configuration
Parameter setup
1.
Define source in Pr
x.24
simulated encoder source
2.
Using Pr
x.38
configure terminals 8 and 9 on connector PL1 for marker output
6.6
Freeze inputs
6.6.1
Configuration
If a freeze input of 24V or RS485 is to be used to freeze more than one SM-Universal
Encoder Plus, the freeze drive/slot bus input should be selected with Pr
x.38
.
When Pr
x.41
= 0 freeze occurs on the rising edge of the freeze input and when Pr
x.41
= 1 freeze occurs on the falling edge of the freeze input.
High A and B (or high F) alignment may alter the position.
NOTE
High A and B (or high F) alignment may alter the position.
NOTE
If the source is not feedback device, the simulator waits until all feedback device
sources have initialise before the starting to output. The wait for initialisation does not
occur if the drive software version is less than
V01.08.00
NOTE
In order to have the marker pulse synchronised to the falling edge of the encoder output
the encoder input signals on terminals 1, 2, 3, and 4 have to be reversed (e.g. A with A\
and B with B\).
Limitations apply if the drive software version is later than
V01.07.00
, refer to Pr
x.38
description (limited freeze inputs).
NOTE
NOTE
Any unused freeze inputs when operating with another freeze input should be held in a
low condition to prevent spurious/incorrect operation of the freeze. If multiple freeze
inputs are connected, the freeze will operate as an OR function.
NOTE
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