AW Gear Meters EMO-1005 - Manual (Page 30)

AW-Lake Company 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
REV. 1a 05/98 EMO-1005 Manual.DOC
29
THE EMO-1005 SERIAL PORT
The standard EMO-1005 has a RS-422 serial port. AW-Company decided to use the RS-422 as a
standard because of higher noise immunity and better acceptance in industrial applications.
General characteristics for the EMO-1005 serial port.
Signals: RS-422 Standard with the following components
Receiver: SN75157
Transmitter:SN74159 (tri-state output)
Receiver has no pull-ups or pull-downs
Transmitter in tri-state when no action
Baud Rate: Programmable, 2400, 4800 or 9600 baud
Stop bits: 1 Stop bit
Start bits: 1 Start bit
Data bits: 8 Data bits
Parity: No Parity
Echo: Supports Echo Mode (Receive ---> transmit)
Module Offset: Supports large scale systems with offset
Protocol: OPTOMUX-like protocol format
The serial port is used in conjunction with a host computer.
SERIAL PORT PROGRAMMING
To enter serial port programming press the following key sequence:
CHA -> DP -> ENT -> 1
The display will show:
BAUD RATE: 9600=1
4800=2 2400=3
By pressing 1,2 or 3 the indicated baud rate can be programmed and the display will automatically go
to the next step
.
ECHO ON=1 OFF=0
PRESS 1 or 0
Echo mode should be selected in the trouble shooting session. In Echo mode the EMO-1005 transmits
exactly the same string it receives. The next step is:
ACTIVATE SERIAL
1=ON 0=OFF