Mitsubishi A1SD75M1, User Manual

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MELSEC-A
6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL
(2) Starting by inputting external start signal
When starting positioning control by inputting the external start signal, the start
command can be directly input into the AD75. This allows the variation time
equivalent to one scan time of the PLC CPU 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. To start
positioning control by inputting the external start signal, set the "data required to
be set" and then turn ON the external start signal.
Restrictions
When starting by inputting the external start signal, the start complete signal [X1,
X2, X3] will not turn ON.
Data required to be set
To execute positioning start with the external start signal, set parameter ( Pr.43 )
beforehand, and validate the "external start signal" with the "external start function
valid setting program (program No. 5).
Buffer memory address
Setting item
Setting
value
Setting details
Axis 1 Axis 2 Axis 3
Pr.43
External start
function selection
0 Set to "0: External positioning start". 62 212 362
Cd.25 External start valid 1 Set to "1: Validate external start". 1171 1221 1271
* Refer to Chapter "5 DATA USED FOR POSITIONING CONTROL" for details on the setting details.
Starting time chart
Pr. 43 External start function selection
0
V
t
1(00)
External start signal
1
Cd. 25 External start valid
0 1
Dwell time
Operation pattern
Positioning start signal
PLC READY signal
AD75 READY signal
Start complete signal
BUSY signal
Error detection signal
Cd. 11 Positioning start No.
Positioning complete signal
Positioning data No.
[Y10]
[Y1D]
[X0]
[X1]
[X4]
[X7]
[XA]
Fig. 6.10 Time chart for starting with external start signal