Omron TJ2-MC64 - PROGRAMMING Programming Manual page 267

Examples and tips
And therefore:
Pn202
Pn203
From this equation, we can derive the values for Pn202, Pn203 and UNITS,
given the following restrictions and recommendations:
1. Pn202 and Pn203 are integers.
2. UNITS must not have an infinite number of decimal digits. This can
create rounding errors that result in small position errors that add up to
large accumulative position errors.
3. For reasons of stability, it is necessary to avoid situations where Pn202/
Pn203 is less than 0.01 or greater than 100. It is recommended that
Pn202/Pn203 is approximately 1.
We can now rewrite the last equation to:
UNITS
One solution to this equation is:
UNITS = 2
Pn202 = 10
Pn203 = 360
When we consider the third recommendation from the above list (avoid
situations where Pn202/Pn203 is less than 0.01 or greater than 100), we can
rewrite the last equation to:
Pn202
UNITS·
Pn203
This gives us the solution:
PROGRAMMING MANUAL
13
.
2 10
.
UNITS =
360
Pn202 10
13
.
= 2
Pn203 360
13
= 8192
5
10 2 32
13 8 8
= 2 = 2 = 2
360 36 36
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