
Title
Sheet
Draw. No.
nalog input
separate detector interface unit
18/18
FANUC LTD
A-56731E-0099
Description Desig. Date Edit.
01 050714 Matsukane
1891 (FS15i)
Number of position pulses (PPLS)
2024 (FS30i,16i)
Set the number of position pulses according to the following equation:
(Equation for parameter calculation)
Amount of movement per motor revolution [mm]
Number of position pulses =
Detector signal pitch [mm]/512
If the calculation result is greater than 32767, use the following position
pulse conversion coefficient (PSMPYL) to obtain the parameter setting
(PPLS).
2628 (FS15i)
Position pulse conversion coefficient (PSMPYL)
2185 (FS30i,16ii)
This parameter is used when the calculation result of the number of
position pulses is greater than 32767.
(Equation for parameter calculation)
Set this parameter so that the following equation is satisfied:
Number of position pulses = PPLS × PSMPYL
(Example of parameter setting)
[System configuration]
• A linear scale with a signal pitch of 20 µm is used.
• The least input increment of the controller is 1 µm.
• The amount of movement per motor revolution is 16 mm.
[Parameter setting]
• To enable a separate detector, set bit 1 of parameter No. 1815 to 1.
• Calculate the parameters for the flexible feed gear.
Because flexible feed gear (N/M)=(20/512µm)/1µm=5/128
No.2084=5, No.2085=128
• Calculate the number of position pulses.
Number of position pulses = 16 mm/(0.02 mm/512= 409,600
Because this result does not fall in the setting range (0 to 32767),
set A and B, respectively, with the "number of position pulses"
and "position pulses conversion coefficient" by assuming:
409,600 = 25,600 × 16 → A = 25,600, B = 16
No.2024 = 25,600, No.2185 = 16