Slave Ratio Setting; Decimal Places - PowerTec Digimax Installation And Operation Instruction Manual

#3 #3 #3

#3 DECIMAL PLACES

#3 DECIMAL PLACES DECIMAL PLACES DECIMAL PLACES DECIMAL PLACES
Set the number of decimal places in the ACTUAL display (whether in MASTER or in
SLAVE mode). Enter a whole number from 0 (no decimal places at all) to 4 (decimal point
after the first digit on the left).
Ratios automatically have four decimal places in the COMMAND mode, and this
cannot be altered by the setting of this parameter.
Parameter #3 may be changed in the RUN mode. The display will immediately reflect
the new decimal location.
#4 #4

SLAVE RATIO SETTING

SLAVE RATIO SETTING
#4 #4 #4 SLAVE RATIO SETTING SLAVE RATIO SETTING SLAVE RATIO SETTING
In the MASTER mode, this value is ignored.
In the SLAVE mode, this parameter is the ratio of the motor pulse rate (at TB2 terminals
11 and 12) to the incoming pulse rate at TB2 terminals 13 and 14 when the SETPOINT is
1.0000. The pulse train frequencies involved are dependent on motor size, RPM's and
encoder rate (for information on setting the base ratio, see page 34).
Attempting to change this parameter while running generates an error code (Err13).
#5 #5 #5 #5 #5 FEEDBACK PPR FEEDBACK PPR FEEDBACK PPR FEEDBACK PPR FEEDBACK PPR
This pulse train (in pulses per revolution) is a product of the encoder pulses per
revolution (in one feedback channel) times the pulse multiplier of the EPROM on the Current
Controller Board (part # 141-108) of the motor control.
Parameter #5 may not be changed in the RUN mode.
The standard multiplier for the 141-108 Current Controller EPROM (part no. 141-300)
is four. This gives 120 PPR output from the control for 30 PPR encoders, and 240 PPR output
from the control with the 60 PPR encoders. Other multiplier values of 2 or 1 are used mostly
on high speed motors (above 3600 RPM) and/or with encoders rated at 600 PPR or more.
The Model 500 has a selectable feedback rate via switches on the logic board. With the
Model 500, check switches S1-1 and S1-2.
If there is a doubt as to either the encoder PPR or the EPROM multiplier, check the
motor for a special (external) encoder, then follow this procedure :
If there is no special encoder, make sure that the default parameters are installed in
the first eight parameters of the DIGIMAX
them later), set a speed of 60 (sixty) into the SETPOINT and start the control. A standard
EPROM and a 30 PPR encoder will cause the motor to turn one revolution every second.
A standard EPROM and a 60 PPR encoder will cause the motor to turn once every 2
seconds. An EPROM multiplier of 2 will result in motor speeds twice as fast and an EPROM
multiplier of 1 in motor speeds four times as fast.
If there is an external encoder on the motor, put the number of PPR (or "lines") from
the encoder nameplate into parameter #5. With the default values in the rest of the first eight
parameters in the DIGIMAX
on. A standard EPROM (with a multiplier of 4) will cause the motor to turn at a rate of one
revolution per second (or 60 RPM). An EPROM with a multiplier of 2 will cause a speed of
2 revolutions per second (120 RPM). An EPROM with a multiplier of 1 will result in a speed
of 4 revolutions per second (240 RPM).
#6 #6 #6 ACCELERATION TIME #6 #6 ACCELERATION TIME ACCELERATION TIME ACCELERATION TIME ACCELERATION TIME
For MASTER mode, enter the acceleration time (in tenths of seconds) from zero speed
to full speed (as determined by parameter #1). Valid values are from 0.0 to 999.9 seconds.
It will take one half (1/2) of this time to go from zero speed to half speed or from half speed
to full speed. Other proportional changes in speed take like proportions of time. This
parameter also sets the increase rate of the Motor Operated Potentiometer mode.
In SLAVE mode, this time affects the time it takes for the ratio to change from one value
Page 16
DIGIMAX DIGIMAX DIGIMAX
DIGIMAX
DIGIMAX DIGIMAX
DIGIMAX DIGIMAX , set a speed value of 15 into the SETPOINT and turn the motor
®
(record the current parameters for restoring
®
© copyright 1992-1996 by Powertec Industrial Motors