Chapter 5 Operation
5.3 I/O Signals
ME0394-1A
5-20
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
EC Connection Unit
SYS LED
：
On
24V DC power supply is
turned ON.
2
Output
*ALM
E*RD
*ALM:Turns ON if no alarm
has been triggered.
E*RD: It turns on when
operation ready
(servo on)
3
Input
ST0
∆
t1
When the [ST0] signal is
turned ON, home return
operation begins.
4
Output
LS0
∆
t2
EC Connection Unit
Backward End LED:
On
Home return operation is
complete and the unit
moves to the backward end.
5
Input
ST1
∆
t2
Moves to the forward end.
6
Output
LS1
EC Connection Unit
Forward End LED:
On
Moved to the forward end.
7
Input
ST0
∆
t2
Moves to the backward end.
8
Output
LS0
Moved to the backward end.
9
After this, "
5
" to "
8
" repeat.
∆∆
t1: Wait approximately 0.5 seconds from when the E*RD signal turns ON before inputting the
first command.
∆∆
t2: The time taken for the ELECYLINDER actually to reach the forward or backward end after
the LS signal turns ON. Consider
∆∆
t2 when giving instructions for the next operation from
the PLC to the ELECYLINDER.
Also,
∆∆
t2 varies depending on the communication time among PLC
⇔
EC connection unit
⇔
ELECYLINDER, size of payload and acceleration/deceleration.
Output
Input
ELECYLINDER →
output signals to PLC
PLC → input signals to
ELECYLINDER
Power ON
Home return
Move to forward
end
Move to backward
end
Summary of Contents for Rec
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