40
Table Creation
The internal processing of the Position Control Unit is as follows during table
creation.
1, 2, 3... 1.
The speed difference,
∆
V, is obtained to express the range of speed set-
tings.
∆
V = MAX – MIN
where,
MAX: Twice the maximum set value (not to exceed 100,000).
MIN:
Speed indicated by initial speed number.
2.
The number of division steps, L, is determined such that the unit time for
each step is 4 ms. The maximum number of steps is 250.
L = (
∆
V/R)
where,
R:
Acceleration or deceleration data, whichever greater.
∆
V/R: Acceleration (or deceleration) time between MAX and MIN
4
3.
Next, the speed difference (
∆υ
) for each step is obtained.
∆υ
= (
∆
V/L)
4.
The divider ratios for all steps are calculated and set in a table.
Step
Target (step) speed
Division ratio
1
MIN
2
MIN +
∆υ
3
MIN + 2 x
∆υ
L
MAX
5.
Example
Start speed
0 (pps)
Maximum value of speed data Nos. 1 to 15
20000 (pps)
Acceleration
100 (pps/1ms)
Deceleration
100 (pps/1ms)
DM Area Allocation
Section 3–7
