Mitsubishi Electric MELSEC-L LD75D, User Manual

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529
CHAPTER 12 CONTROL SUB FUNCTIONS
12
12.
3 F
unct
ions
fo
r Compens
at
ing t
he Cont
rol
(2) Control precautions
When command speed V1 and V2 are in the condition 1) or 2) below, the command output is that of "At constant
speed" even though "At deceleration" was selected.
1) When "V1

V2"
2) When "(Speed value converted from distance

l)
*1

V2 < V1"
*1 The height of the grey area in the graph on the bottom right
(3) Setting method
To use the function "output timing selection of near pass control", set the following control data in a program.
The set data is made valid on the rising edge (OFF to ON) of the PLC READY signal [Y0].
Refer to  Page 211, Section 5.7 for the information on detail settings.
Setting item
Setting
value
Setting details Buffer memory address
[Cd.43]
Output timing
selection of near
pass control

Select the timing to output the difference (

l) between the actual
and the set positioning end addresses in continuous path control,
in which the difference (

l) is output during the execution of the
next positioning data.
• 0: At constant speed
• 1: At deceleration
1934
1) When "V1 V2"
Speed
Speed
Speed
Speed
V2 V2
V1 V1
V1
V1
V2 V2
Less than 0.9ms
Less than 0.9ms
0.9ms
0.9ms
Time
Time
Time
Time
Positioning data
No.1
Positioning data
No.1
Positioning data
No.1
Positioning data
No.1
Positioning data
No.2
Positioning data
No.2
Positioning data
No.2
Positioning data
No.2
2) When "(Speed value converted from distance ) V2 V1" l