INSTRUCTIONAL MANUAL
2750L-P/4500L-P/6000L-P
August, 2001
Rev. K
-38-
DLY value in seconds. The parameter will then return to a final value specified by the VAL value.
The ramp function will step the output parameter value specified by a previous screen with the STP value, the DLY time
per step and the final VAL setup in the RMP screen. The ramp will increment if the VAL value is larger than the
parameter value. It will decrement if it is less than the parameter value.
NOTE
The DLY, STP or VAL parameters must be specified (A, B or C key depressed)
before the number value for the parameter is entered.
When ramping frequency, an error message will result with an attempt to step the frequency with greater resolution
than that possible by the initial or final values.
The step program may also be used to generate a dropout to zero volts on phase A at any point on the waveform. This
type of program is selected by setting the AMP value to zero before setting the DLY and VAL parameters. The point on
the waveform at which the dropout occurs is specified by setting the A value in the (PHZ) screen.
The following key sequence will program 130V for 2.5 seconds and then return to a final value of 115V.
1.
Select the AMP screen and enable 130 volts to be programmed:
5
ENT 130
PRG (*)
2.
Select the RMP screen, program a DLY of 2.5, a final VAL of 115 volts and run the program:
9
ENT A
2.5
PRG C
115
PRG ENT
The next example will illustrate a ramp program. The following sequence will ramp the frequency from 60 hertz to 400
hertz in .1 hertz steps with a delay (DLY) for each step of .003 seconds. The total time for this ramp will be = [(VAL-
FRQ)/STP]DLY or 10.2 seconds.
1.
Select the FRQ screen and set the starting frequency of 60 Hz:
6
ENT 60
PRG
2.
Select the RMP screen, set a DLY of .003, set the STP of .1, set the final VAL of 400 and run the
program:
9
ENT A 0.003 PRG B 0.1 PRG C 400 PRG ENT
(*)If the ENT key is depressed at this point, the AMP would be programmed to and remain at 130 volts.
The following program will illustrate a dropout to zero volts. The program will drop the output to zero volt at 90 degrees
for .002 seconds and return to 115 volts. This example will cause the Clock to stop for 0.002 seconds. For this
example the output waveform will start at the same point that it stopped.
1.
Select the AMP screen and program output to 115 volts:
5 ENT 115 PRG ENT
2.
Select the PHZ screen and program A to 90:
7 ENT 90 A PRG
3.
Select the AMP screen and program the dropout voltage to zero volt:
Summary of Contents for 2750L-P Series
Page 119: ...INSTRUCTIONAL MANUAL 2750L P 4500L P 6000L P August 2001 Rev K 115 Figure 6 1 MODULE LOCATION...
Page 138: ...INSTRUCTIONAL MANUAL 2750L P 4500L P 6000L P August 2001 Rev K 134 Figure 14 EMERGENCY VOLTAGE...
Page 148: ...INSTRUCTIONAL MANUAL 2750L P 4500L P 6000L P August 2001 Rev K 144 FIGURE 2...
