Yokogawa digitalYEWFLO (DY) - Manual (Page 26)

IM 1F2B4-01-YIA
Page 22
QUICK START USING THE BT100/200
II. QUICK START
BT100/BT200 H
ANDHELD
T
ERMINAL
Note: If you specified the correct process conditions on your order, these parameters have been preset at the
factory; therefore, there is no need to re-enter the data.
The Style E YEWFLO is a smart communicating device with microprocessor-based technology.
When used with Yokogawa’s BT100 or BT200 handheld terminal (HHT), YEWFLO can be
configured to meet specific application needs. In addition, the optional local indicator/totalizer (TBL
option) allows setting of various parameters.
When in the analog output mode, the HHT may be connected at any point on the instrument's
4-20 mA loop. This connection superimposes a digital signal on top of the instrument’s 4-20 mA
signal making communications completely transparent to your process signal. On the other hand,
since there are no 4-20 mA wires in the pulse mode, direct connection of the HHT to the HHT
PULSE and HHT COM test points on the amplifier is necessary. Once connected, flowrate and total
can be read, tag numbers entered, meter size or any other parameter modified as required.
Additionally, you may activate or deactivate many features of the YEWFLO as necessary to meet
the requirements of your application.
The HHT will enable you to scroll through the program until you locate the parameter that you wish
to change. For communication information, see “How to communicate with the YEWFLO remotely”
in the maintenance section. Please refer to the appropriate HHT instruction manual for details on
each HHT.
To change a parameter using the BT100, insert the removable key in the lock and turn it clockwise
to the ENABLE position. If the key is not in place or if it is in the INHIBIT position, you will receive an
OPERATION ERR message on the display when you press either the INC or DEC key or try to enter
an alphanumeric value in any parameter. If this occurs, insert the key in the lock, turn it clockwise to
the ENABLE position then press either the INC, DEC or alphanumeric key as before.
2.1 P
ARAMETER
S
ETTING IN
BRAIN™ C
OMMUNICATIONS
The Model YF100*E Vortex flowmeter incorporates BRAIN™ communication functions. These
functions enable the Vortex converter to remotely carry out the following functions by
communicating with the BRAIN™ Terminal (BT100 or BT200), µXL, or Centum-XL distributed
control systems.
• Setting or changing parameters required for vortex meter operation such as tag number, flow span
and process conditions for example.
• Monitoring flowrate, totalized flow and self-diagnostics.
• 4-20 mA loop check (simulated output) and totalizer reset.
Note: When the pulse/analog jumpers are set for a pulse output, Remote BRAIN™ communication on the
4-20 mA wires is not available. Therefore parameters cannot be set or read remotely. For the BT100
to operate in the pulse output mode, the instrument must be connected to the test points labeled HHT
Pulse and HHT Com. This allows access to all parameters.
Note: Only the position of the jumpers affects remote communication ability, the software setting of pulse or
4-20 mA has no effect.