Parker ac890 - Page 582

Programming D-186
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
Parameter Descriptions
SPEED OUTPUT
PREF: 118.13
Default: —.xx Hz
Range: —.xx Hz
Master speed output.
ACCEL OUTPUT
PREF: 118.15
Default: —.xx
Range: —.xx
Master acceleration output in /s^2.
RAMPING
PREF: 118.16
Default: FALSE
Range: FALSE / TRUE
This is set TRUE when ramping.
STATUS
PREF: 118.19
Default: 4
Range: See below
Operating status of the Virtual Master.
Enumerated Value : Status
0 : READY operating correctly
1 : RESET RESET input is FALSE
2 : DUPLICATE another VIRTUAL MASTER has the same CHANNEL number
3 : INITIALISING FireWire is present but state not yet known
4 : NO FIREWIRE No FireWire Option fitted or no FireWire power supplied
5 : DISABLED CHANNEL set to zero
Functional Description
The time needed to stop or accelerate is:
As the speed is symmetrical, the average speed is V/2 therefore the stopping / acceleration distance can be calculated:
V is the maximum speed the drive must reach in % / sec.
A is the maximum allowable acceleration in %/sec
2
.
J is the maximum allowable value for jerk, in %/sec
3
Note: These only hold true if Jerk = Jerk2 for acceleration or Jerk 3 = Jerk 4 for deceleration.
(seconds)
J
A
A
V
t(meters)
J
A
A
V
2
V
s +=






+=