Multidrop Mode - YOKOGAWA ADMAG AXR User Manual

b) Acknowledge Event Notification
Execute Acknowledge Event Notification
method.
1) Enter "the event number which is confirmed
in a) 5" into "Enter Event Number".
2) OK.
3) Set "Select Transaction" to "Trans 1 : Send
Acknowledge".
4) OK.
5) Confirm "Even Status" is 0x00.
(3-3) Event Notification Record (DTM only)
• Procedure to call up the display
DTM [Root Menu] → Detailed setup →
Output condition →HART output
→ Burst condition → Event
Notification → Event knowledge
→
→ Acknowledge Acquisition of the event number
Event Notification and approval.
a) Get Event Number
Confirm the latest event number.
Execute Acknowledge Event Notification
method.
1) Set "Enter Event Number" to "0".
2) OK.
3) Set "Select Transaction" to "Trans 0: Read
Event Notification".
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 which is confirmed
in a) 5" into "Enter Event Number".
2) OK.
3) Set "Select Transaction" to "Trans 0:Read
Event Notification".
4) OK.
5) Knowledge menu displays events record.
Ex.) When the confirmed event number is 123.
Event Number
123 The latest event
122 An event before the once.
121 An event before the twice.
120 An event before three times.
<9. OPERATION VIA HART CONFIGURATION TOOL (HART 7)>
Explanation

9.8.4 Multidrop Mode

"Multidropping" transmitters refer to the connection
of several transmitters to a single communication
transmission line. Up to 63 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
63. 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 [Root Menu] → Detailed setup
DTM →Output condition →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,
Read the User's Manual of each configuration tool.
When Loop current mode is set to "Enabled", an
analog signal output is available for one device in a
loop.
• Procedure to call up the display
[Root Menu] → Detailed setup →
DD
DTM Output condition →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 transmitters in multidrop mode,
communication with these devices is disabled.
(3) Communication when set in multidrop
mode.
• The HART configuration tool searches for a
device that is set in multidrop mode when it is
turned on. When the HART configuration tool
is connected to the device, the polling address
and the tag will be displayed.
• Select the desired device. After that, normal
communication to the selected device is
possible. However, the communication speed
will be slow.
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IM 01E30D01-01EN