Maintenance for 2001N, 2002N, and 1800R Manual

MOD30ML and Modcell Maintenance Manual
DIAGNOSING I/O MODULE PROBLEMS
SECTION 5
DIAGNOSING I/O MODULE PROBLEMS
5.1 GENERAL
The status display in the Application Builder Software allows access to Extended Error Codes
which can help trouble shoot the instrument. The extended error data includes both status
information and fault information for analog I/O modules. The extended error code is a two
byte (16 bit) code from the module that is presented as a count value. When the status
display in the Application Builder Software is used to view the code, the decimal count value
is shown and the program automatically converts the value to binary and displays a text
message for each status bit and for any error bit indicating an error. An example of the data
for a WRIM module containing a fault is shown in Figure 5.1. The count value, 14368, has
been decoded to provide six status messages and one error message. A complete list of the
extended error code messages with recommended action for fault conditions is shown in
Tables 5.2 and 5.3.
NOTE: When PC-30 or a similar host system is used to view the error codes, the host reads
the Extended Error (EXTERR) attribute and returns only the decimal count value. The
user must program the host software to decode (or manually decode) the bitmapped
error pattern shown in Table 5.2 or 5.3.
5.2 READING EXTENDED ERROR CODES
If there is a suspected problem with either an analog input or output module, proceed as
follows:
1. Determine the database occurrence number of the I/O module block for the problem
module:
• Click on the I/O Graphic icon in the Tool Bar to access the graphical representation
of I/O module slots.
• Query the required slot by clicking the right mouse key on the slot number. A window
appears listing the tag name and type of module occupying the slot.
• Look up the tag name in the .CRF file to determine the block occurrence number.
2. Verify that the correct module is in the slot:
• Access the Instrument Status display.
• Read the module ID by typing the following on the command line:
R (module)(x),MODID
where (module) is the mnemonic for the type of module being addressed and (x) is
the occurrence number of the module block. For example, to read the ID for
occurrence number 1 of a VCIM module, type:
R VCIM1,MODID
• Compare the code returned to the ID codes listed in Table 5.1 to confirm that the
module is correct.
5 -1