PCI-1243U User Manual
34
4.1.4 R3: Accel/decel Rate Register (10 bits)
This register is used to select the acceleration (ramping up) and decelera-
tion (ramping down) characteristics.
If PCI-1243U executes a high-speed mode start, the motor starts at the FL
speed entered in R1, and accelerates to the FH speed entered in R2.
The motor decelerates to FL speed when a “SD” (slow down) signal is
received, the ramping down point is reached, or a deceleration command
is received. Specify the acceleration and deceleration characteristics for
these operating patterns using the accel/decel rate setting register. The
acceleration rate of the linear accel/decel is equal to the maximum accel-
eration rate of the S-curve acceleration/deceleration pattern.
If the reference clock period is (TCLK) [sec], T
SUD
(the time required for
the ramping-up / ramping-down) is:
T
SUD
= [(R2)-(R1)] x (R3) x (TCLK) x Multiplier [sec]
Alternatively, if the ramping-up/ramping-down time is known, R3 can be
calculated as: R3 = T
SUD
/ {[(R2)-(R1)] x (TCLK) x Multiplier}
The range for R3 is 002 (hex) to 3FF (hex) (2 to 1023 in decimal).
The allowable range is: 2 to 1,023 (3FF HEX).
Figure 4.2: R3’s Effect
Note
Multiplier = 1 while in Linear Accel/Decel mode
Multiplier = 2 while in S-curve Accel/Decel mode
Note
For PCI-1243U, TCLK = 233.ns
FH
FL
time
Speed
T
SUD
T
SUD
Summary of Contents for PCI-1243U
Page 1: ...PCI 1243U 4 Axis Stepping Motor Control Card User Manual ...
Page 8: ...PCI 1243U User Manual viii ...
Page 14: ...PCI 1243U User Manual 6 ...
Page 35: ...27 Chapter3 Figure 3 8 Point to Point Movement ...
Page 38: ...PCI 1243U User Manual 30 ...
Page 80: ...PCI 1243U User Manual 72 Appendix A Diagrams A 1 Jumper and Switch Layout ...
Page 82: ...PCI 1243U User Manual 74 ...
Page 88: ...PCI 1243U User Manual 80 ...