Yokogawa EJX930A - Manual (Page 46)

<3. Parameter Setting>
3-35
IM 01C25R02-01E
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
range, 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 need to be set when
Burst
Command is Cmd9:Device vars w/Status (up to
eight items) and Cmd33: Device Variables (up to
four items).
• Procedure to call up the display
DD (HART 7)
DTM (HART 7)
[Root Menu] → Detailed setup →
Output condition →HART output →
Burst condition → Burst Message
1,2 or 3 → Burst Device Variables →
Burst Variable Code →
Display Item Contents
Flow Select the flow rate
Pres Select the differential pressure
SP Select the static pressure
ET Select the external temperature
Total Flow Select the total flow
PV Select the PV value
SV Select the SV value
TV Select the TV value
QV Select the QV value
% rnge Select the % output
Loop current Select the output current
Not Used –
c. Update period and Max Update Period
Set to
Update Period and Max Update Period.
When the period that is earlier than the operation
period of each process value was set, it is set
automatically to become bigger than an operation
period of EJX multivariable transmitter.
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
→Output condition →HART
output → Burst condition → Burst
Message 1,2 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 →
Output condition →HART output →
Burst condition → Burst Message 1,2
or 3 → Set Burst Trigger →
Display Item Contents
Continuous Burst Message is transmitted
continuously.
Window In “Window” mode, the Trigger Value
must be a positive number and is the
symmetric window around the last
communicated value.
Rising In “Rising” mode, the Burst Message
must be published when the source
value exceeds the threshold
established by the trigger value.
Falling In “Falling” mode, the Burst Message
must be published when the source
value fall below the threshold
established by the trigger value.
On-change In “On-change” mode, the Burst
Message must be published when the
source value on change established
by the trigger value.