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Tel: (86)755-26434369
40
Website: www.leadshine.com
7. Using Tips
Sequence Chart of Control Signals
In order to avoid some fault operations and deviations, PUL, DIR and EN should
abide by some rules, shown as the following figure:
Figure14: Sequence chart of control signals
Notes:
a)
t
1
: EN must be ahead of DIR by at least 5
µ
s. Usually, ENA is NC (not
connected). See
Connections
section for more information.
b)
t
2
: DIR must be ahead of PUL effective edge by at least 5
µ
s to ensure
correct direction.
c)
t
3
: Pulse width not less than 2.5s;
d)
t
4
: Low level width not less than 2.5s.
Protection Functions
To improve reliability, the driver incorporates some built-in protection functions.
The DCS303 uses one RED LED to indicate what protection has been activated. The
periodic time of RED is 5 s (seconds), and how many times the RED turns on
indicates what protection has been activated. Because only one protection can be
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Tel: (86)755-26434369
41
Website: www.leadshine.com
displayed by RED LED, so the driver will decide what error to display according to
their priorities. See the following
Protection Indications
table for displaying
priorities.
Over-current Protection
Protection will be activated when continuous current exceeds 20A, and RED LED
will turn on once within each periodic time (5 s).
Over-voltage Protection
When power supply voltage exceeds 36.5
±
1.5 VDC, protection will be activated
and RED LED will turn on twice within each periodic time (5 s).
Phase Error Protection
Motor power lines wrong & not connected and encoder feedback signals A/B phases
wrong connected will activate this protection. RED LED will turn on four times
within each periodic time (5 s).
Encoder Error Protection
No encoder feedback signals or wrong encoder feedback signals will activate this
protection. RED LED will turn on five times within each periodic time (5 s).
Position Following Error Protection
When position following error reaches Position Following Error Limit parameter
setting in the driver, this protection will be activated. RED LED will turn on seven
times within each periodic time (5 s).
Attention:
Since there is no protection against power leads (
﹢
,
﹣
) reversal, it is
critical to make sure that power supply leads correctly connected to driver.
Otherwise, the driver will be damaged instantly.
