Device Diagnostics; Slg 700 Ff Level Transmitter Memory; Performing Diagnostics In The Background; Block_Err Parameter - Honeywell SLG 700 Option Manual

7.4 Device Diagnostics

SLG 700 FF level transmitter memory

The transmitter contains a number of areas of memory. An EEPROM provides a non-volatile
memory area for static and non-volatile parameter values. The transmitter also contains areas of
RAM and ROM.

Performing diagnostics in the background

Block objects (Resource, Transducer and Function blocks), the communications stack and other
device objects, each of them have an allotted area of memory for their corresponding database.
Diagnostic routines are performed in the background during device operations that checks the
integrity of these individual databases. When a failure is detected, a status bit is set in the
BLOCK_ERR parameter in the appropriate block object. Diagnostic checks are performed
continuously on the device functional databases of the transmitter application shown in Table
Block object database (DB)
Communication stack database (DB)
Boot ROM
Program ROM
Trend and link object databases (DB)

BLOCK_ERR parameter

BLOCK_ERR parameter shows diagnostic faults of hardware and software components within
the transmitter. Each block object in the transmitter device application contains a BLOCK_ERR
parameter. BLOCK_ERR is actually a bit string, which provides a means to show multiple status
or error conditions. A status message identifying the fault can be viewed by accessing the
parameter. Table 3 shows the bit mapping of the BLOCK_ERR parameter.
Rev.5
Table 36: Diagnostics
Device Functional Area
FOUNDATION Fieldbus Option User's Manual
Location
RAM and EEPROM
EEPROM
ROM
ROM
ROM
36.
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