Yokogawa EJA438 - Manual (Page 30)

IM 1C22J1-01E 7-1
7. BRAIN TERMINAL BT200 OPERATION
7. BRAIN TERMINAL BT200
OPERATION
The DPharp is equipped with BRAIN communica-
tions capabilities, so that range changes, Tag No.
setup, monitoring of self-diagnostic results, and zero
point adjustment can be handled by remote control
via BT200 BRAIN TERMINAL or CENTUM CS
console. This section describes procedures for setting
parameters using the BT200. For details concerning
the BT200, see IM 1C0A10-E, “BT200 User’s
Manual.”
7.1 BT200 Operation Precau-
tions
7.1.1 Connecting the BT200
The transmitter and the BT200 can be connected
either to the BT200 connection hooks in the transmit-
ter terminal box or to a relaying terminal board.
Relaying
terminals
Distributor
Control room
Terminal board
F0701.EPS
Figure 7.1.1 Connecting the BT200
7.1.2 Conditions of Communication Line
DPharp
BT200
Cable
resistance Rc
Cable resistance Rc
Load
resistance R
cc
Power
supply
᭹ Loop resistance = R + 2Rc
= 250 to 600
Ω
᭹ Loop capacitance = 0.22
µ
F max.
F0702.EPS
Figure 7.1.2 Conditions of Communication Line
7.2 BT200 Operating Procedures
7.2.1 Key Layout and Screen Display
Figure 7.2.1a shows the arrangement of the operating
keys on the BT200 keypad, and Figure 7.2.1b shows
the BT200 screen component.
F0703.EPS
LCD
(21 character
×
8 lines)
Movement keys
Power ON/OFF key
Function keys
ENTER key
Alphanumeric keys
Shift keys
Figure 7.2.1a BT200 Key Layout
PARAM
A10:OUTPUT
100.0 %
A11:ENGR. OUTPUT
1000 mmH20
A20:AMP TEMP
23 deg C
Menu choices
Messages
MENU SCREEN
Screen title
MENU
A:DISPLAY
B:SENSOR TYPE BATTERY
HOME SET ADJ ESC
Function
commands
PARAMETER SCREEN
Parameters
DATA DI AG PRNT
F0704.EPS
Figure 7.2.1b BT200 Screen Component