Mitsubishi Electric MELSEC-L LD75P User Manual page 786

Term
DECELERATION TIME
DECELERATION RATIO
CURRENT VALUE
CURRENT VALUE CHANGING
ERROR CORRECTION
FAST OPR
COMPOSITE SPEED
784
The parameter deceleration time is the same value as the acceleration time. Deceleration time refers to the time
from the speed limit value to a stopped state, so it becomes proportionally shorter as the setting speed
decreases.
Speed limit value
Setting speed
Speed 0
A ratio used when the machine is decelerated using a toothed gear. This ratio is a numeral larger than 1.
Input gear speed
Deceleration
=
ratio
Output gear speed
This is the current address (position) when stopped or during positioning.
The LD75 has no way of knowing the current value when the machine is assembled and the positioning module
is connected, so this function is used to teach it a temporary approximate value as the current value. This
function can also be used to write a temporary current value when the current value has been lost due to
accidents, etc. If an OPR is carried out after that, the positioning module will recognize the zero point.
To prevent the accumulated value from exceeding the stroke limit in fixed-feed, etc., rewrite the current value to 0
after the fixed-feed. The current value can be changed during a positioning stop.
If a dimension error occurs in the machine, and that error is actually smaller or larger than 1m (3.28feet) in spite
of a 1m (3.28feet) command being issued from the LD75, that error amount will be compensated. For example,
when the error is actually smaller than 1m (3.28feet), the remaining distance to 1m (3.28feet) is fed, and the
correct 1m (3.28feet) of positioning is carried out.
The axis returns to the machine OP at the OPR speed without detecting the near-point dog.
(This is not validated unless a machine OPR has been carried out first.)
OPR speed
OP
Near-point dog switch
The movement speed for the target control during interpolation operations.
Y axis
speed
Description
Time
Deceleration time
Composite speed
X axis speed