Yokogawa EJA440E - Manual (Page 48)

<4. Diagnostics>
4-1
IM 01C25T01-06EN
4. Diagnostics
4.1 Self-Diagnostics
4.1.1 Identify Problems by Using HART
Configuration Tool
The HART configuration tool can be used to run
self-diagnostics on a transmitter and check for
incorrect data settings.
(1) DD and DTM (excluding EJX HART 5 DTM
based on FDT1.2)
The Self test and Status commands are available
for self-diagnostics. When Self test is run, the
integral indicator shows an error code and alarm
message if the transmitter detects any illegal
parameter settings or functional faults. See Table
4.5 Alarm Message Summary for probable cause
and countermeasures.
• Procedure to call up the Self test display
[Root Menu] → Diag/Service →
Test (DTM)/Test device (DD) → Self test
If no error is detected, “Self test OK” is displayed on
the configuration tool.
If the specific diagnostic item is known for the
check, you can directly call up the item by using the
Status command.
The status is categorized from 1 to 9 for HART 5,
and from 1 to 10 for HART 7.
See Table 4.5 to determine the status group.
Show an example below to confirm the status of
Status group 1.
• Procedure to call up the Status display
[Root Menu] → Diag/Service → Test device (DD only)
→ Status → Status group 1
If no error is detected, “Off” is displayed on the
configuration tool.
If there is an error, “On” is displayed on the
configuration tool, and a countermeasure for that
error is necessary.
Example of display: Illegal P LRV On
Illegal P URV Off
Illegal P SPAN Off
P SPAN trim err Off
P ZERO trim err Off
The HART configuration tool diagnoses at each
communication.
When an improper operation is performed, the error
message is displayed.
See Table 4.6 HART Configuration Tool Error
Message.
(2) EJX HART 5 DTM based on FDT1.2
The
Device Status commands are used for self-
diagnostics. When Device Status is run, the
integral indicator shows an error code and alarm
message if the transmitter detects any illegal
parameter settings or functional faults. See Table
4.5 Alarm Message Summary for probable cause
and countermeasures.
• Procedure to call up the Device Status display
Device Status
If no error is detected, “Status: Normal” is displayed
on the configuration tool.
If the specific diagnostic item is known for the
check, you can directly call up the item by using the
Diagnostic List in the Device Status display.
The Diagnostic List is categorized to Device Status,
Hardware Failure, Transducer Status, Diag Status,
and Configuration.
See Table 4.5 Alarm Message Summary.
If no error is detected, color symbol which shows
Normal State is displayed on top of the error
message.
If color symbol which shows Error State is
displayed, there is an error and a countermeasure
for that error is necessary.
The HART configuration tool diagnoses at each
communication.
When an improper operation is performed, the error
message is displayed.
See Table 4.6 HART Configuration Tool Error
Message.