Yokogawa EJA440E - Manual (Page 45)

<3. Parameter Setting>
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IM 01C25T01-06EN
b) Acknowledge Event Notification
Execute
Acknowledge Event Notification
method.
1) Set to Enter Event Number is in confirmed
Event Number a)5.
2) OK.
3) Set “Trans 1: Send Acknowledge” to Select
Transaction.
4) OK.
5) Confirm Event Status is 0x00.
(3) Event Notification Record
• Procedure to call up the display
DD and DTM [Root Menu] → Detailed setup →
Output condition →HART output
→ Burst condition → Event
Notification → Knowledge →
→ Acknowledge
Event Notification
Acquisition of the event number
and approval.
a) Get Event Number
Confirm the latest event number.
Execute Acknowledge Event Notification
method.
1) Enter Event Number is set to “0”.
2) OK.
3) Set “Trans 0: Read Event Notificaiton” to
Select Transaction.
4) OK.
5) Confirm Event Number.
b) Confirmation record of Event Notification
Confirm four events checked in a).
Execute Acknowledge Event Notification
method.
1) Enter the event number to Enter Event
Number which is confirmed in a)5.
2) OK.
3) Set “Trans 0: Read Event Notificaiton” to
Select Transaction.
4) OK.
5) Knowledge menu displays events record.
Ex.) When the confirmed event number is 123.
Event Number Explanation
123 The latest event
122 An event before the once.
121 An event before the twice.
120 An event before three times.
3.3.17 Multidrop Mode
3.3.17.1 Setting on HART 5
HART 5
“Multidropping” transmitters refer to the connection
of several transmitters to a single communication
transmission line. Up to 15 transmitters can be
connected when set in the multidrop mode. To
activate multidrop communication, the transmitter
address must be changed to a number from 1 to
15. This change deactivates the 4 to 20 mA analog
output, sending it to 4 mA. The alarm current is also
disabled.
Setting of Multidrop Mode
(1) Polling address
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup →
Output condition → HART output
→
EJX_HART 5[1.2]
DTM
Configuration → HART →
→ Poll addr Enter the number from 1 to 15
(2) Enabling the Multidrop Mode of
Configuration Tool
About the procedure to call up the Polling
display, please refer to the User’s Manual of each
configuration tool.
NOTE
When the same polling address is set for
two or more transmitters in multidrop mode,
communication with these transmitters is
disabled.
(3) Communication when set in multidrop
mode.
• The HART configuration tool searches for a
transmitter that is set in multidrop mode when
it is turned on. When the HART configuration
tool is connected to the transmitter, the polling
address and the tag will be displayed.
• Select the desired transmitter. After that, normal
communication to the selected transmitter is
possible. However, the communication speed
will be slow.
To release multidrop mode, call up the Poll addr
display and set the address to “0”.