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Start by the external command signal (DI)
When starting positioning control by inputting the external command signal (DI), the start command can be directly input into
the Simple Motion module. This allows the variation time equivalent to one scan time of the CPU module to be eliminated.
This is an effective procedure when operation is to be started as quickly as possible with the start command or when the
starting variation time is to be suppressed.
■Start method
Set "[Pr.42] External command function selection" in advance to enable "[Cd.8] External command valid" by a program. Then,
turn ON the external command signal (DI).
n: Axis No. - 1
Setting item
[Pr.42]
External command
function selection
[Cd.8]
External command valid
*1 Set the external command signal (DI) to be used in "[Pr.95] External command signal".
Refer to the followings for the setting details.
Page 407 Basic Setting, Page 504 Control Data
■Restriction
When starting by inputting the external command signal (DI), the start complete signal ([Md.31] Status: b14) will not turn ON.
■Starting time chart
• RD77MS4 operation example
Positioning start signal [Y10]
All axis servo ON
[Y1]
[Md.26] Axis operation
status
PLC READY signal
[Y0]
READY signal
[X0]
Start complete signal
([Md.31] Status: b14)
BUSY signal
[X10]
Positioning complete signal
([Md.31] Status: b15)
Error detection signal
([Md.31] Status: b13)
External command signal
[Pr.42] External command
[Cd.3] Positioning start No.
[Cd.8] External command
1 START AND STOP
1.1 Start
Setting value
Setting details
0
Set to "0: External positioning start".
1
Set to "1: Validate external command".
Operation pattern
V
Positioning data No.
Servo OFF
Standby
function selection
valid
1(00)
0
1
1
0
Buffer memory address
62+150n
4305+100n
Dwell time
t
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Table of Contents
Troubleshooting
Also See for Mitsubishi Electric RD77MS2
Mitsubishi Electric RD77MS2 User Manual
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