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Logic Control Malfunctions
Malfunction
Drive Stops even though No
STOP Command was Issued.
Contactor Remains Closed
After A STOP Command.
Link/Configuration
Parameter Malfunctions
Velocity Control
Malfunctions
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Symptom
STOP (bit 11) is set in one of the
logic commands.
No STOP bits were set, drive
stopped.
No STOP bits were set, drive
stopped.
The configuration parameters determine where and how the real–time Input
and Output signals will be used by the 1395 drive. These types of problems
can usually be avoided if the Start–up Procedure is closely followed and the
application is well defined. Often the problem can be tracked to a parameter
entry error during programming.
Link/Configuration Parameter Malfunctions
Malfunction
An error in the
configuration of the drive
often exhibits itself in sink
parameters not reflecting
the desired input signals
from the source
parameters.
Velocity control is the function block which controls the direction and
velocity of the motor. This function block has many set–up and
configuration parameters which can affect the operation and performance of
the drive. It deals not only with velocity regulation but with torque
regulation and most motor related functions. It is important that the Start–up
procedure has been properly performed before attempting these
troubleshooting techniques.
The following table lists malfunctions, symptoms and possible solutions.
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Malfunctions Not Indicated by a Fault
Solution
• A safety system external to the drive is issuing a STOP command. This
could be coming through any of the Adapters.
• The STOP key on the Bulletin 1300 Programming Terminal was
pressed which will stop the drive regardless if LOCAL mode is active.
• ECOAST string was opened during operation. ECOAST string must be
closed prior to attempting to restart the drive.
• A drive fault was detected and stopped the drive. Examine the Fault
Queue to determine the exact cause.
• The Close Contactor (bit 13) is set in the logic command. Determine
what is activating this bit and correct.
Solution
• The easiest way to troubleshoot this type of problem is to start
examining the source parameter closest to the actual input. In the
case of a signal coming from one of the adapters, verify that the
source parameter data is correct. If it is not, the problem exists
between the origin of the signal and the Adapter Board.
• If the adapter's source parameter is correct then check the sink
parameter that is linked to it. The data should be exactly the
same, taking into account any unit conversions that may exist. If
the data is not exact, a problem in the configuration links exist.
This methodology can be used to track data throughout the 1395
drive.
• If the 1395 has experienced a Hard or Soft Fault, the System
Processor will not process configuration links that direct data
transfer to, or from, a processor that is faulted. The same is true if
an attempt to direct data to an adapter board that is not mounted
is attempted.
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