IAI EC-ST15, Instruction Manual

Page: 101 / 210

4.5 Operating method from master device
4-17
4. Operation
This shows the PLC timing chart for operating the ELECYLINDER.
The basic process is as follows.
[Basic timing chart]
Category
Signal
abbreviation
Timing chart Remarks
1 Power Power ON
LED status: OFF →
Orange ON → Green ON
24VDC power supply is turned ON.
2 Output * ALM
Turns ON if no alarm has been
triggered.
3 Input ST0 Δ t1
When the [ST0] signal is turned
ON, home return operation begins.
4 Output LS0
Δ
t2
Home return operation is complete
and the unit moves to the backward
end.
5 Input ST1
Δ t2
Moves to the forward end.
6 Output LS1 Moved to the forward end.
7 Input ST0
Δ
t2
Moves to the backward end.
8 Output LS0
Moved to the backward end.
9
After this, " 5 " to " 8 " repeat.
Δ
t1: Wait approximately 0.5 seconds from when the *ALM signal turns ON before inputting the first command.
Δ
t2: The time taken for the ELECYLINDER actually to reach the forward or backward end after the LS signal turns ON.
Consider
Δ
t2 when giving instructions for the next operation from the PLC to the ELECYLINDER.
Δ
t2 becomes longer for larger detection ranges.
Δ
t2 also changes with the size of the transported load and acceleration/deceleration speeds.
Output Input
ELECYLINDER →
output signals to PLC PLC → input signals to
ELECYLINDER
Power ON Home return Move to forward end Move to backward end