Ei Bisynch Binary Message Protocol - Parker 590+ DRV Product Manual

A-16
Serial Communications

EI Bisynch Binary Message Protocol

Transmission Standard
Protocol
Data Rates
Character Format
Parity
Transferring Data - Binary Example Messages
There are two message types:
1. Main Messages
2. Continuation Messages
Main Messages
The main messages are in four types:
SELECTION
The Supervisor writes to one parameter. The (BCC) character contains the checksum of all characters following the (STX).
(EOT)
POLLING
The Supervisor requests to read the value of one parameter.
(EOT)
ENQUIRY POLLING
The Supervisor requests to read all parameters in block 1.
(EOT)
MULTI-PARAMETER POLLING
The Supervisor requests to read a given number of parameters. That number is referred to as the count number (CNO), it is included in the request
message and the reply will be sent by the drive, in blocks of up to 8 parameters.
(EOT)
NOTE
The (CCC) is the checksum of the characters following an (EOT) and is therefore equal to (INO) in Selection and Enquiry Polling messages.
: RS485 (RS422 bi-directional)
: ANSI-X3.28-2.5-B1
: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 or 115200 Baud
: 1 start + 8 bit ASCII data + 1 parity + 1 stop bit (11 bits)
: Even
(INO) (CCC) (STX) (PNO)
(INO) (PNO) (CCC) (ENQ)
(INO) (CCC) (ENQ)
(INO) (PNO) (CNO) (CCC)
(D1) (D2) (D3) (ETX)
(ENQ)
(BCC)
DC590+ DRV Series DC Digital Drive