Rockwell Automation 193-EPRB Profibus Side Mount Module for the E1 Plus Overload Relay User Manual - Manual (Page 30)

Publication 193-UM010A-EN-P – January 2008
4-4 Troubleshooting
Trip and Warning
Troubleshooting Procedures
The following table lists the possible causes for each trip type and the recommended action to
take.
OUT A Output A does not appear to
turn on (close) when
commanded to do so. 1. Check the supply voltage
2. Check the programmable controller ladder logic and I/O mapping.
3. Remove the control circuit power and check for continuity across the appropriate output terminals
(13/14). If the continuity test indicates the output is open, replace the E1 Plus PROFIBUS Module. Check
the supply voltage against the ratings of the contactor and the relay output before installing a new unit.
4. Remove control circuit power and check the control circuit fuse and the control wiring to the E1 Plus
PROFIBUS Module output terminals.
5. Check the control circuit power supply. Verify the voltage is within the contactor and overload relay
ratings.
6. Check the DEVICE STATUS and TRIP STATUS parameters. If a Protection Fault exists, refer to the Trip
and Warning troubleshooting procedure. If a PROFIBUS-related fault exists, refer to the PROFIBUS
troubleshooting procedure.
7. Check the OUTA Pr FltState, Pr FltValue, Pb FltState, Pb FltValue, Pb IdlState, and Pb IdlValue
programmable parameters. The Pr FltState and Pr FltValue parameter supersede the Pb Flt or Pb Idle
parameters.
OUT A Output A does not appear to
turn off (open) when
commanded to do so. 1. Check the programmable controller ladder logic and I/O mapping.
2. Remove the control circuit power and check for continuity across the appropriate output terminals
(13/14). If the continuity test indicates the output is closed, replace the E1 Plus PROFIBUS Module.
Check the supply voltage against ratings of the contactor and the relay output before installing a new
unit.
3. Remove control circuit power and check the control circuit fuse and the control wiring to the E1 Plus
PROFIBUS Module output terminals.
4. Check the OUTA Pr FltState, Pr FltValue, Pb FltState, Pb FltValue, Pb IdlState, and Pb IdlValue
programmable parameters. Then check the DEVICE STATUS and TRIP STATUS parameters. If a
Protection Fault exists, refer to the TRIP STATUS parameters. If a Protection fault exists, refer to the Trip
and Warning troubleshooting procedure. If a PROFIBUS-related fault exists, refer to the PROFIBUS
troubleshooting procedure.
OUT A The contactor connected to
Output A appears to “chatter” 1. Check the programmable controller’s ladder logic program.
2. Check the control circuit supply voltage. Verify it is within the ratings of the contactor coil and the
overload relay’s outputs.
3. Remove the control circuit power. Verify all control wiring is properly secured.
Table 4.6 Input and Output Troubleshooting Procedures (Continued)
Failure Type Failure Description Corrective Action
Table 4.7 Trip/Warn LED Troubleshooting Procedures
Overload 1. Motor overloaded
2. Improper setting
1. Check and correct source of overload (load, mechanical transmission
components, motor bearings).
2. Set FLA dial and trip class to match the motor and application requirements.
Phase Loss 1. Missing supply phase
2. Poor electrical connection
3. Contactor operation
4. Improper device type
1. Check for open line (i.e. blown fuse).
2. Check all power terminations from the branch circuit-protecting device down to
the motor for proper tightness. Ensure that the overload connection to the
contactor is secure.
3. Inspect contactor for proper operation.
4. Bulletin 193S or 592S are required for single-phase applications.
Jam 1. Motor current has exceeded the programmed jam level
2. Improper parameter settings 1. Check for the source of the jam (i.e. excessive load or mechanical transmission
component failure).
2. Parameter 15, Jam Trip Level, is set too low for the application. Check to ensure
that the FLA dial is set correctly.