Yokogawa digitalYEWFLO (DY) - Manual (Page 80)

<9. OPERATION VIA HART CONFIGURATION TOOL (HART 7)>
9-8
IM 01F06A00-01EN
b) Acknowledge Event Notifi cation
Execute Acknowledge Event Notifi cation
method.
1) Set the event number which is confi rmed in
a)5 to enter Event Number.
2) OK.
3) Set “Trans 1: Send Acknowledge” to Select
Transaction.
4) OK.
5) Confi rm Event Status is 0x00.
(3) Event Notifi cation Record (DTM)
• Procedure to call up the display
DTM (HART 7) [Root Menu] → Detailed setup →
Confi gure outputs → HART output →
Event Notifi cation → Knowledge →
→ Acknowledge
Event
Notifi cation
Acquisition of the event number and
approval.
a) Get Event Number
Confi rm the latest event number.
Execute Acknowledge Event Notifi cation
method.
1) Set “0” to enter Event Number.
2) OK.
3) Set “Trans 0: Read Event Notifi cation” to
Select Transaction.
4) OK.
5) Confi rm Event Number.
b) Confi rmation record of Event
Notifi cation
Confi rm four events checked in a).
1) Set the event number which is confi rmed in
a)5 to enter Event Number.
2) OK.
3) Set “Trans 0: Read Event Notifi cation” to
Select Transaction.
4) OK.
5) Knowledge menu displays events record.
Ex.) When the confi 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.
9.10.4 Multidrop Mode
“Multidroping” devices refer to the connection
of several devices to a single communication
transmission line. Up to 63 devices can be
connected when set in the multidrop mode. To
activate multidrop communication, the device
address must be changed to a number from 1 to 63.
If it sets to multidrop mode, in order to transmit all
the data in digital one, it is necessary to change a
setup of the analog signal output of four to 20 mA.
Setting of Multidrop Mode
(1) Polling address
• Procedure to call up the display
DD (HART 7)
DTM (HART 7) [Root Menu] → Detailed setup →
Confi gure outputs → HART output →
→ Poll addr Enter the number from 1 to 63
(2) Enabling the Multidrop Mode
About the procedure to call up the Polling
display, refer to the User’s Manual of each
confi guration tool.
Usually, set Disable to Loop current mode
and fi x an analog output signal to 4mADC. It
becomes impossible in this case, to also use a
burnout output.
However, in the case of the application which
receives and operates an analog output signal,
an analog output signal can be used for one
loop to variable one set, setting it up. In this
case, set Enable to Loop current mode.
• Procedure to call up the display
DD (HART 7)
DTM (HART 7) [Root Menu] → Detailed setup →
Confi gure outputs → Analog output →
Loop current mode →
Enabled Loop current mode is enabled.
Disabled Loop current mode is disabled.
NOTE
When the same polling address is set for two or
more devices in multidrop mode, communication
with these devices are disabled.