DESCRIPTION
This communication protocol is based on Version 1.4, which was released NOV
2005 and is used with all EVOLUTION products. The communications option
converses with a host computer via an RS485 data link.
NOTE: EACH REQUEST OR COMMAND SENT TO A PRINT STATION
RECEIVES A RESPONSE FROM THAT PRINT STATION. COMMUNICATIONS
SOFTWARE MUST WAIT FOR A RESPONSE TO DETERMINE IF THE PRINT
STATION WAS READY TO ACCEPT THE COMMAND, AND THE DATA WAS
VALID AND PROCESSED. NO RESPONSE COULD INDICATE THE DATA
WAS LOST. IF AN ERROR WAS DETECTED IN PROCESSING A NAK WITH
AN ERROR CODE IS RETURNED.
DATA WORD DEFINITION
Full Duplex
7 Data Bits
1 Even Parity Bit
1 Start Bit
1 Stop Bit
BAUD RATE
115,200 Bits per second
DEFINITIONS
Q= QUERY TO HEAD
R= RESPONSE FROM HEAD
D= DATA UPDATE TO HEAD
X= ACK FROM HEAD
{ }= ASCII CHARACTER OR CHARACTER STRING
| FIELD SEPARATOR
0x21 HEX DATA EQUIVELENT
ADDRESS= TWO ASCII REPRESENTATIONS OF HEX CHARACTERS
`x`|`y` TWO ASCII CHARACTERS REPRESENTING THE UPPER AND LOWER
NIBBLE OF A HEXADECIMAL BYTE WHERE X IS THE UPPER NIBBLE AND
Y IS THE LOWER NIBBLE
FOR
EXAMPLE:
TO SEND A SPEED OF 165 FEET PER MINUTE SEND – ASCII : AND ASCII 5
WHICH WOULD BE 0x3A AND 0x35 HEXADECIMAL
TO SEND A DELAY OF 30 SEND – ASCII 3 AND ASCII 0
WHICH WOULD BE 0x33 AND 0x30 HEXADECIMAL
CABLING FOR EVLINK ENVIRONMENT
C20552
RS232C to RS485 converter module
C20551
Cable from PC to RS485 converter module
C21008-25 Cable (25') from EVOLUTION units to RS485 data link
C21008-50 Cable (50') from EVOLUTION
units to RS485 data link
C21009
Termination plug for RS485 data link
2
EVOLUTION SC
SYSTEM MANUAL Issue 1.1 15 November 2006
