Yokogawa EJA440E User Manual download pdf (Page 45)

<3. Parameter Setting>

3-32

IM 01C25T01-06EN

b) Acknowledge Event Notication

Execute Acknowledge Event Notication

method.

1) Set to Enter Event Number is in conrmed

Event Number a)5.

2) OK.

3) Set “Trans 1: Send Acknowledge” to Select

Transaction.

4) OK.

5) Conrm Event Status is 0x00.

(3) Event Notication Record

• Procedure to call up the display

DD and DTM [Root Menu] → Detailed setup →

Output condition →HART output

→ Burst condition → Event

Notication → Knowledge →

→ Acknowledge

Event Notication

Acquisition of the event number

and approval.

a) Get Event Number

Conrm the latest event number.

Execute Acknowledge Event Notication

method.

1) Enter Event Number is set to “0”.

2) OK.

3) Set “Trans 0: Read Event Noticaiton” to

Select Transaction.

4) OK.

5) Conrm Event Number.

b) Conrmation record of Event Notication

Conrm four events checked in a).

Execute Acknowledge Event Notication

method.

1) Enter the event number to Enter Event

Number which is conrmed in a)5.

2) OK.

3) Set “Trans 0: Read Event Noticaiton” to

Select Transaction.

4) OK.

5) Knowledge menu displays events record.

Ex.) When the conrmed 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

Conguration → HART →

→ Poll addr Enter the number from 1 to 15

(2) Enabling the Multidrop Mode of

Conguration Tool

About the procedure to call up the Polling

display, please refer to the User’s Manual of each

conguration 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 conguration tool searches for a

transmitter that is set in multidrop mode when

it is turned on. When the HART conguration

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”.

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Yokogawa EJA440E User Manual Page 45

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