Flintec FDT-B - Manual (Page 19)

FLINTEC
Document Date Code Rev. Page
FDT – VERSION A/B – TECH. -REFERENCE MANUAL 05.04.99 FDT.RM 2 19 of 23
8. COMMUNICATIONS
Version A has one communication port RS485A (SERIAL PORT 1). This is the port used for
connection to FAD(s) and for networking.
Version B has in addition to serial port 1 an RS232C port (SERIAL PORT 2), used for connection
with printers or personal computers.
8.1
SERIAL PORT 1 (RS485A)
The port operates in half duplex mode. Communication is based on “LESIP” master / slave serial
interface protocol. (See “LESIP” with FAD appendix for details).
Baudrate and databits are configured in FDT setup 3.
Cable connections are shown in Annex A “CONNECTOR & CABLE DIAGRAM”.
8.2
SERIAL PORT 2 (RS232C , VERSION B ONLY)
The port operates if full duplex mode. Baudrate is fixed at 1200 bits/sec. 7 data bits, even parity or
8 data bits no parity may be selected in FDT SET UP 2.d. The functionality of the port is
also programmed in set up 2. The different modes of operation are detailed below:
8.2.1
CONTINUOUS WEIGHT OUTPUT
The indicated weight and status information is transmitted continuously. No handshake is required.
Data is output from Pin 3 = Tx and Pin 5 = GND
SET UP
REQUIREMENTS (1200, E, 7, 1)
1 Don’t care
2 2.t = 02, 2.d = 17 the rest don’t care
3 According to application
DATA BLOCK COMPOSITION ( P +123.45 CR )
BYTE NAME
DESCRIPTION
1
2
3-8
9
WEIGHT
STATUS
POLARITY
WEIGHT
DIGITS
SYNC
Bit0
0=NORMAL 1=NO WEIGHT DISPLAY
Bit1 0=GROSS 1=NET
Bit2 0= 1=AUTO ZERO
Bit3 0=WITHIN RANGE 1=OUT OF RANGE
Bit4 0=NO STANDSTILL 1=STANDSTILL
Bit5 0=NORMAL 1=UNDER MIN. WEIGHING RANGE
Bit6 ALWAYS 1 TO OBTAIN PRINTABLE CHARACTERS
Bit7 ZERO OR PARITY
"+" OR "-"
6 DIGITS DEPENDING ON D 500 N SET UP
INCLUDING DECIMAL POINT IF ANY
CR (0d hex) FOR SYNCHRONISATION