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14
Diagnostics
There are many different tools available to the user to help diagnose problems or errors in the Unidrive SP/Digitax ST and
EZMotion. The most common tools used are the Error Codes, Analog Outputs, and PowerTools Pro utilities such as the Watch
Window, Fault View, Status Bar, and Online View Tabs. Any or all of these can be used to figure out why an application may
not be running properly.
The following section gives detailed information about each of the tools listed above.
14.1
Errors and Error Codes
The Unidrive SP/Digitax ST and EZMotion fault handling system is made of a series of Trips, Trip Codes, Errors, and Error
Codes. Following is a definition of each.
A Trip is an action that happens in the Unidrive SP/Digitax ST that causes the drive bridge to be inhibited therefore stopping all
motion. When the drive inhibits, the drive does not have control of the motor/load.
An Error is an action that happens in EZMotion or Unidrive SP/Digitax ST that may or may not cause the drive to Trip. Most of
the Errors that occur in EZMotion will cause a Trip on the drive.
Following is a description of the Errors Handling System used by EZMotion.
When EZMotion has an error (i.e. Program - Divide By Zero Error), it sends a signal to the drive that the error occurred. The
drive then recognizes the error in the module by causing the drive to trip. The specific trip that will be displayed on the drive
depends on the slot number that EZMotion is located in. The drive trip will be a Sl#.Er trip where # indicates the slot # that
module error occurred in.
The Unidrive SP/Digitax ST Trip Log will be updated with the Sl#.Er trip. To find out what the specific error in the module was,
the user needs to query parameter MM.50 where MM is 15, 16, or 17 depending on the slot # of the module. Parameter
MM.50 stores the error code for the specific error that occurred.
Following is a list of Errors that can occur in EZMotion along with Error Codes, potential causes, and reset methods for each
fault.
Error
Cause
Code
Trip?
(x.50)
41
Y
42
Y
43
Y
44
Y
73
Y
74
Y
100
Y
101
Y
102
Y
EZMotion User/Programming Guide
Revision A8
Error
SP Parameter Access Error -
Parameter Doesn't Exist
SP Parameter Access Error -
Parameter is Read Only
SP Parameter Access Error -
Parameter is Write Only
SP Parameter Access Error -
Written Value Out of Range
SP Database Setup Error
Module Overheat Error
Watchdog Timer Error
Invalid Configuration Error
NVM Invalid Error
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Possible Reason
The SP Menu Parameter that you
are trying to read from or write to
does not exist.
The SP Menu Parameter that you
are trying to write to is a Read
Only parameter
The SP Menu Parameter that you
are trying to read from is Write
Only
The value you are trying to write
to the SP Menu Parameter is out
of range.
SM-EZMotion module
temperature has exceeded 83°
Celsius
Can occur when user downloads
SyPTLite ladder diagram to the
Unidrive SP/Digitax ST when a
EZMotion is present
Possible Solution
Please double check the
parameter number
Avoid writing to Read Only
parameters. Use Drive Menu
Watch view in PowerTools Pro, or
Unidrive SP User Guide to verify
parameter accessibility
Avoid reading from Write Only
parameters. Use Drive Menu
Watch view in PowerTools Pro, or
Unidrive SP User Guide to verify
parameter accessibility
Modify value that you are trying to
write so that it is within valid range
of the parameter. Use the Unidrive
SP User Guide to verify the range
of the parameter and try again
Select lower switching frequency
in PowerTools Pro configuration,
or reduce motion performance
(i.e. lower accel/decel, lengthen
dwells). If problem persists,
please contact factory
If trip occurs when SyPTLite
program is downloaded, simply
press reset button to clear error. If
problem persists, please consult
the factory
237
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