Flowserve 400MD Logix - Manual (Page 80)

10 Troubleshooting
10.1 Introduction
This section contains information about identifying device faults and suggested actions to correct them. The approach to troubleshooting is
determining the cause of the fault through definition of the symptoms (such as a device not visible on network or not able to write values to
parameters).
The information is organized the following way:
• Device troubleshooting tables list some of the more commonly encountered faults and sugges tions to check in order to find out where
the problem is and correct it.
• Positioner status tables define some of the conditions that cause critical or non-critical faults in the transmitter. Critical and non-critical faults
are described and suggestions are given on where to find further information.
• Device diagnostics briefly explains about some of the background diagnostics that are active in the device during normal operation. Device
parameters are described that provide information about hardware and software status within the device.
• Block configuration errors summarize conditions within the device which may be caused by configuration errors and suggestions on where to
look to correct the errors.
• Simulation mode describes how to set up the transmitter to generate a user-defined simulated input. This feature is useful in debugging the
system when the process is not running.
10.2 Overview
Device Status and Failures
Logix 3400MD digital positioner is constantly running internal background diagnostics to monitor the functions and status of device operation. When
errors and failures are detected, they are reported in the status bits of various parameters in each block object, e.a. BLOCK_ERR or ERROR_DETAIL. Other
parameters can be viewed showing a status description and/or a value which may identify a fault.
Device status and certain operational faults are identified by viewing the parameter status or values and interpreting their meaning using the tables in
this section.
CAUTION: Additional diagnostics may be available through supervisory and control applications that monitor and control fieldbus networks.
These diagnostics and messages are dependent upon the capabilities of the application and control system used.
Troubleshooting with the NI-FBUS Configuration Tool
The diagnostic messages generated by the Logix 3400MD digital positioner and block parameters can be accessed and evaluated using the NI-FBUS Con-
figurator. Troubleshooting of some Logix 3400MD digital positioner faults and corrective actions also can be performed using the configurator.
Fault Summary
Diagnostic messages can be grouped into one of these three categories.
1. Non-critical Failures (Blink Code Starts Y) — Logix 3400MD digital positioner continues to calculate PV output.
2. Critical Failures (Blink Code Starts R)— Logix 3400MD digital positioner drives PV output to fail-safe state.
3. Configuration Errors — Incorrect parameter values may cause the Logix 3400MD digital positioner to generate a fault.
A description of each condition in each category is given in the following tables. The condition is described, a probable cause is stated and a
recommended corrective action is given for each fault.
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
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