Yokogawa digitalYEWFLO (DY) - Manual (Page 78)

<9. OPERATION VIA HART CONFIGURATION TOOL (HART 7)>
9-6
IM 01F06A00-01EN
a. Burst Command
Select the transmission data at Burst Command
parameter.
Burst Command Command parameter
Cmd1:PV Variable assigned to PV
Cmd2:% range/current % range/current (Percent of rang,
Loop current)
Cmd3:Dyn vars/current Process vars/current (Loop current,
PV, SV, TV, QV)
Cmd9:Device vars
w/Status Process vars/% range/current
Mapping by user
Cmd33:Device
Variables Process vars/% range/current
Mapping by user
Cmd48:Read Additional
Device Status Self diagnosis information
b. Burst Variable Code
This parameter is possible to be set when Burst
Command is Cmd9:Device vars w/Status (up to
eight items) and Cmd33: Device Variables (up to
four items).
Set device variables to a bare minimum to avoid to
get the communication time longer.
• Procedure to call up the display
DD (HART 7)
DTM (HART 7) [Root Menu] → Detailed setup →
Confi gure outputs → HART output →
Burst Condition → Burst Message1, 2 or 3
→ Burst Device Variables →
Burst Variable Code
→
Display Item Contents
Flowrate Flowrate
Total Total fl ow
Temperature Temperature
Density Density
%rnge Select the % output
Loop current Select the output current
PV Select the PV value
SV Select the SV value
TV Select the TV value
QV Select the QV value
Not use –
c. Update Period and Max Update Period
Set to Update Period and MaxUpdate Period.
Set greater value of update period than a value
which is set in each process value.
For Update Period, set the value that is smaller
than Max Update Period.
• Procedure to call up the display
DD (HART 7)
DTM (HART 7) [Root Menu] → Detailed setup →
Confi gure outputs → HART output →
Burst Condition → Burst Message1, 2
or 3 → Set Burst Period →
→ Update Period
/Max Update
Period 0.5 s
1 s
2 s
4 s
8 s
16 s
32 s
1 min
5 min
10 min
15 min
30 min
45 min
60 min
d. Burst Msg Trigger Mode
Set The Burst Msg Trigger Mode from the
parameters shown below.
When Burst Msg Trigger Mode is Window, Rising
or Falling, set the Burst Trigger Level.
• Procedure to call up the display
DD (HART 7)
DTM (HART 7) [Root Menu] → Detailed setup →
Confi gure outputs → HART output →
Burst Condition → Burst Message1, 2 or 3
→ Set Burst Trigger →
Display Item Contents
Continuous Burst Message is transmitted contiuously.
Window It detects that the absolute value of the
amount of change of a device variable value
became beyond the preset value of Burst
Trigger Level, and transmits.
Rising It detects that the device variable value
became beyond the preset value of Burst
Trigger Level, and transmits.
Falling It detects that the device variable value
turned into below the preset value of Burst
Trigger Level, and transmits.
On-change It detects that the device variable value
changed and transmits.
*1: Check transmitting conditions with the cycle set as Update
Period, and when it corresponds to conditions, they transmit.
Moreover, even if it does not correspond to conditions, it
transmits compulsorily with the cycle set up by Max Update
Period.