Service Manual - AMS Neve

SynchroNet ES/2 Service Manual
MACHINE PARAMETERS
SERVO CONTROLLED WIND
RESERVED $10b0
SWNDMX $10b1/2/3
This 24-bit number determines the value placed in the servo register for maximum wind speed. For
a DC servo controlled machine the smallest (fastest) meaningful value is 00 48 00.
SWNDMN $10b4/5/6
This 24-bit number determines the value placed in the servo register for minimum wind speed. For
a DC servo controlled machine the largest (slowest) meaningful value is 01 d4 00.
SWNDGN $10b7
This byte determines the value placed in the DC servo gain register. It is only applicable if DC speed
control is selected using TOGTYP.
SWNDOFF $10b8
This byte determines the value placed in the DC servo offset register. It is only applicable if DC
speed control is selected.
SWNDNEG $10b9
display : SWNDNE
If DC speed control requires decreasing voltage for increasing speed then this flag should be set to
non zero, otherwise set to zero gives increasing voltage for increasing speed. It is only applicable if
DC speed control is selected.
SWNDSTP $10ba/b
display : SWNDST
This 16-bit number determines the change per command step (20ms) when in servo controlled
wind.
The current value in the servo wind control register (24 bits) is divided by 2 SWNDSTP number of
times to obtain the correction factor for the new value. Thus if SWNDSTP is set to 1 then half the
current value is used as the step size. If SWNDSTP is set to 7 then the servo will change by 1/128th
of it’s present value each command step.
The DC output voltage can be assessed from the formula
20
975 39
DCout 10 ( * SWNDOFF ( * Vf )* SWNDGN)
256
25600 2560
where Vf is derived from the FM servo dividers (i.e. SWNDGN has no effect when Vf = 2.5v, Vf has
no effect when SWNDGN = 0)
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