Mitsubishi Electric RD77MS2 - Page 24

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1 START AND STOP
1.1 Start
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
*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
Setting item Setting value Setting details Buffer memory address
[Pr.42] External command
function selection
0 Set to "0: External positioning start". 62+150n
[Cd.8] External command valid 1 Set to "1: Validate external command". 4305+100n
[Md.26] Axis operation
status
Positioning start signal [Y10]
V
t
Dwell time
1(00)
Operation pattern
Positioning data No.
PLC READY signal [Y0]
READY signal [X0]
Start complete signal
([Md.31] Status: b14)
BUSY signal
[X10]
Positioning complete signal
([Md.31] Status: b15)
0
Error detection signal
([Md.31] Status: b13)
External command signal
1
01
All axis servo ON [Y1]
StandbyServo OFF
[Pr.42] External command
function selection
[Cd.3] Positioning start No.
[Cd.8] External command
valid