EM542S Digital Stepper Drive User Manual
Page | 12
c)
t3: Pulse width not less than 2.5
s;
d)
t4: Low level width not less than 2.5
s.
11.
Protection Functions
EM542S incorporates are built with over-voltage and over-current error protections. When it is under error
protection, the red LED light will blink for one or two times in a period of 3 seconds. If fault output connection is
connected, the impedance mode between ALM+ and ALM- will be changed (See “Fault Output Configuration”
section for detail).
Priority
Time(s) of
Blink
Sequence wave of red LED
Description
1
st
1
Over-current protection activated when peak
current exceeds the limit.
2
nd
2
Over-voltage protection activated when drive
working voltage is greater than 60VDC
Figure 14
Error Protections
When above protections are active, the motor shaft will be free or the red LED blinks. Reset the drive by repowering it
to make it function properly after removing above problems.
