BY12512d_e.doc / Mai-08
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Please connect your Slave drive to the BY125 as shown:
0...+10
Analogue GND
Digital GND*
Speed input
Forward
Reverse
Dotted connections are valid when the internal 24 volts of the
BY 125 are used to drive the direction outputs
*
In the menu, instead of register “Index Window” you will find the register “Dead Band”. This
register provides proper control of the Forward and Reverse direction outputs as follows:
•
When the Master is moving into forward direction, the “Forward” output will be HIGH
and the “Reverse” output will be LOW
•
When the Master is moving into reverse direction, the “Reverse” output will be HIGH
and the “Forward” output will be LOW
•
When the Master is at Standstill, there are three options:
a. The relative position of the Slave is behind the Master (underswing situation). Then the
“Forward” signal will remain on with a small voltage at the analogue output, so the
Slave can crawl forward into the correct position
b. The relative position of the Slave is ahead of the Master (overswing situation). Then the
“Reverse” signal will remain on with a small voltage at the analogue output, so the
Slave can crawl reverse into the correct position
c. The relative position is inside the set window. Then both direction outputs will be off
and the analogue output will be zero.
•
With inverter drives, you must leave a +/- tolerance window where in standstill the
relative Slave position is allowed to be without further actions of the controller. This
window is set by the register “Dead Band”. The scaling is in “analogue increments”
where each increment corresponds to 5 mV. A typical register setting would be 15
meaning that both direction outputs remain OFF (drive disabled) as soon as the speed
reference voltage gets lower then 75 mV.
