Rockwell Automation 1398-PDM-xxx IQ Master Version 3.2.4 for IA-2000 and IQ-5000 Positioning Drive Modules, IQ-55 - Manual (Page 226)

204 Language Reference • Reference
Publication 1398-PM601A-EN-P — October 2000
WORDS
FDR Feedrate System
Purpose Set the feedrate value. Feedrate can be changed at any time in the program. Feedrate
scales the Timebase for motion. With the Feedrate set at 100%, all velocities and
dwells are at the programmed rates. Feedrate can be set to less than 100% to slow
down a process, or above 100% to speed it up.
Syntax FDR = value
variable = FDR
value Feedrate is entered in percent (the percent sign is not needed)
with a range of 0 to 200. Value can be a constant, a nonvolatile
variable Gn, a volatile variable Vn, or a system variable.
variable The variable may be a nonvolatile variable Gn, a volatile vari-
able Vn or a system variable.
Remarks Feedrate will affect MOVD, MOVP, MOVV, DIF, DV, and DWELL instructions. The
velocity, acceleration and time in these functions will be scaled by the FDR percent-
age.
For example, if the velocity is set to 3,000 RPM and the FDR is set to 50, any motion
will have a velocity that is 50% of 3,000 RPM or 1,500 RPM (3000 * 0.5 = 1500). A
DWELL time is also scaled by FDR. A DWELL of 10 seconds would be scaled to 20
seconds (10 / 0.50 = 20).
A feedrate can also be set with the ADC1 analog input. This is accomplished by
assigning the analog input to feedrate in the Parameter menu, Inputs dialog box. A
common use of this is to connect a potentiometer to this analog input and permit the
operator to set the speed of operation. If the ADC1 input is used as feedrate input, the
ADC1 input voltage can range from 0 to 10 volts, corresponding to 0 to 200% fee-
drate.
Changes made to this variable by a program are only in effect while the program is
running. When the programs ends it will return to the value stored in the Personality
Module. If no change is made to this variable by the program, the value in the Person-
ality Module is used. The value in the Personality Module is set in the Parameter
menu, Velocity/Accel dialog box.
See Also RFDR
Example FDR = 100 ;set feed rate to 100%
FDR = G4
V2 = FDR