EM882S Digital Stepper Drive User Manual
Motion Control Products Ltd. Tel.: (+44) 01202 599922
“Connector P1 Configurations” for more information.
b)
t
2
: DIR must be ahead of PUL effective edge by 5 s to ensure correct direction;
c)
t
3
: Pulse width not less than 2.5 s, duty cycle recommend 50%
d)
t
4
: Low level width not less than 2.5 s
11.
Protection Functions
EM882S incorporates are built with over-voltage and over-current error protections. When it is under error
protection, the red LED light will blink for 1 or 2 or 4 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
Always on
The drive was short-circuited or burned out.
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 90VDC
3
rd
5
Motor stall protection
Figure 14
Error Protections
When above protections are activated, the motor shaft will be free or the red LED blinks. Reset the drive by restart it
to make it function properly after removing above problems.
