YOKOGAWA AXFA14G - BRAIN; HART Connection

<5. Basic Operating Procedures>
57
IM 01E20A01-01EN
NOTE
Incorrect setting:
Out of range.
Touch any key.
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B23:Flow Span
100 l/min
1200000 l/min
Rng:0.00001
→ 32000
If more than one decimal point has been input, the
message“Invalidvalue.Touchanykey.”willbe
displayed. In such a case, touch any switch to return to
Parameter Replacement Mode and redo the setting.
5.5 BRAIN / HART Connection
5.5.1 Connecting the BT200
The connection for a BRAIN Terminal (BT200) is shown
as below.
Refer to its manual (IM 01C00A11-01E) for the operation
of the BT200.
The communication signal of the AXF is superimposed
onto the 4 to 20mA DC analog signals to be transmitted.
The communication can be done through the BT200 set
at any point between the 4 to 20 mA DC signal terminals
ofmagneticowmeterandtheinputterminalsofreceiving
instruments.
Working as a master, the BT200 Permits:
1. Setting and changing parameters for the magnetic
owmeter
2. Monitoring PV and MV values and self-check
informationonthemagneticowmeter,and
3. Directingthemagneticowmetertoenterthe
constant current output mode.
BT200BT200 BT200 BT200
Relaying terminals
Magnetic flowmeter
terminal box
4 to 20mA DC
shignal
transmission line
Control room
Receiving
resistance
250 to
450Ω
Receiving
instrument
Terminal
board
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Figure 5.5.1 Connecting the BT200
IMPORTANT
Communication signal is superimposed on analog
output signal. It is recommended to set a low-pass
lter(approximately0.1s)tothereceiverinorder
to reduce the output effect from communication
signal.Beforeonline-communication,conrmthat
communication signal does not give effect on the
upper system.
IMPORTANT
Restrictions exist with regard to the distance over
which communication is possible.
Referto“OUTLINE”oftheappropriatemanualwhich
can be downloaded from our website.
IMPORTANT
Ifthepowerofowmeteristurnedoffwithin30
seconds after parameters have been set, these
settings will be canceled. Accordingly, keep the power
on for at least 30 seconds after setting parameters.
IMPORTANT
After approximately 5 minutes of inactivity, the Auto
Power-Off function will operate to turn your BT200 off.
NOTE
In case of BT200, the parameters are displayed in
English only.
Even if the language with the exception of English is
selected at B10/H30: Language, the parameters are
displayed in English upon BT200.
Basic Operating Procedures
5