Yokogawa ADMAG AXR - Manual (Page 107)

<8. OPERATION VIA HART CONFIGURATION TOOL (HART 5)>
8-5
IM 01E30D01-01EN
CAUTION
The output adjustment function can match the
4mA and 20mA output to the reference meter
such as a voltmeter. In the output adjustment, it
is necessary to use the calibrated voltmeter and
resistance.
8.8.2 Fixed Current Output
This feature can be used to output a fixed current
for loop checks.
 In the case of using DD
Call up the test output parameter (Loop test) and
select the output signal.
• Procedure to call up the display
DD Device Setup → Diagnosis/Service
→ Test → Loop test →
Display Item Contents
4mA Output a 4mA DC signal
20mA Output a 20mA DC signal
Other Set a desired output signal value
End Exit
 In the case of using DTM
Call up the test output parameter (Loop test) and
select either manual test or auto test, and set the
current value.
• Procedure to call up the display
DTM Diag and Service → Test →
Loop test →
Display Item Contents
Manual Test Set the current value or % value at
Test output value, then click the
Start button.
Auto Test Set the interval and rate of change
of current output at Auto Test
Setting, then click the Start button.
8.8.3 Burst Mode
AXR continuously sends the data via HART
communication when the burst mode is set on (any
one of PV, % range/current, or process vars/crnt).
The data is sent intermittently as a digital signal at 3
times a second.
The burst mode is set as follows.
(1) Setting the data to be sent
• Procedure to call up the display
DD Device Setup → Detailed setup
→ HART output → Burst option
DTM Configuration → HART → Burst
option
Select the type of data to be sent from the
following options:
- Instantaneous flow rate (PV)
- Output in % and current output (% range/
current)
- Instantaneous flow rate, totalization value*
and current output (Process vars/crnt)
* “Totl,” “Reverse Totl” or “Dif Totl”
(2) Setting the burst mode
• Procedure to call up the display
DD Device Setup → Detailed setup →
HART output → Burst mode
DTM Configuration → HART → Burst
mode
Then, select “ On” at the menu to start the burst
mode.
To release from the burst mode, call up the
burst mode display, and set to “ Off.”
The default setting is “ Off.”
8.8.4 Multidrop Mode
When set in the multidrop mode, up to 15 field
devices in a single communications line can be
connected. To activate multidrop communication,
the address of the field devices must be set to a
number from 1 to 15. This deactivates the 4 to 20
mA analog output, fixing it to 4 mA. Burn out is also
disabled.
Note that the accuracy for multidrop mode is
different from that for other modes. Refer to Chapter
11: Outline.
The multidrop mode is set as follows.
(1) Setting the polling address
• Procedure to call up the display
DD (HART 5) Device Setup → Detailed setup →
HART output →
DTM (HART 5) Configuration → HART → Poll addr
→ Poll addr Enter the number from 1 to 15