iSS Series Integrated Stepper Servo Hardware Installation Manual
12
HWMN-ISS-R20120411
9. Protection Functions
To improve reliability, the iSS57 incorporates some built-in protection functions. The Integrated stepper uses one red
LED to indicate the protection type. The periodic time of red is 4 s (seconds), and the blinking times of red LED
indicates what protection has been activated. Because only one protection can be displayed by red LED, so the drive
will decide what error to display according to their priorities. See the following Protection Indications table for
displaying priorities.
Over-current Protection
Over-current protection will be activated when continuous current exceeds 18A or in case of short circuit between
motor coils or between motor coil and ground, and RED LED will blink once within each periodic time.
Over-voltage Protection
When power supply voltage exceeds 60VDC, protection will be activated and red LED will blink twice within each
periodic time.
!
Caution
When above protections are active, the motor shaft will be free or the LED will blink. Reset
the drive by repowering it to make it function properly after removing above problems. Since
there is no protection against power leads (
﹢
,
﹣
) reversal, it is critical to make sure that power
supply leads correctly connected to drive. Otherwise, the drive will be damaged instantly.
Position Error Protection
When the position error exceeds the limit (software configurable, see software manual), position, protection will be
activated and red LED will blink seven times within each periodic time.
Protection Indications
Priority
Time(s) of
Blink
Sequence wave of red LED
Description
1st
1
Over-current protection
activated
when
Ipeak > 18A
2nd
2
Over-voltage protection activated when Vin
≥
60VDC
3rd
7
Position following error exceeds the limit
