Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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1 STARTING AND STOPPING
1.1 Starting
21
1
Starting by inputting an external command signal (CHG)
When the positioning control is started by inputting an external command signal (CHG), the start command can be directly
input to the RD75. This method eliminates the variation time equivalent to one scan time of the CPU module. Use the start
command when an operation is required to be started as soon as possible, or when the starting variation time is to be
suppressed.
■
Starting method
To start the positioning with the external command signal, set [Pr.42] External command function selection beforehand, and
validate [Cd.8] External command valid using a program. After setting those two areas, turn on an external command signal
(CHG).
■ Restrictions
When starting by inputting an external command signal (CHG), Start complete signal [X10, X11, X12, X13] does not turn on.
■
Time chart for starting
Setting item Setting
value Setting detail Buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
[Pr.42] External command function
selection 0 Set 0: Start with external command. 62 212 362 512
[Cd.8] External command valid 1 Set 1: Validate external command. 1505 1605 1705 1805
Cd.3
Pr.42
Cd.8
1
0
0 1
[Y10]
[Y0]
[X0]
[X10]
[XC]
[X14]
[X8]
t
v
1(00)
Operation pattern
Positioning data No.
Positioning start signal
Positioning start No.
External command signal
(externally)
External command
function selection
External command
valid
PLC READY signal
RD75 READY signal
Start complete signal
BUSY signal
Positioning complete
signal
Error detection signal
Dwell time