3--4
General RS-232C/RS-422/RS-485 Specifications
Transmission line connection:
Multiple point
Communications system:
RS-232C/RS-422 (4-wire, half-duplex),
RS-485 (2-wire, half-duplex)
Synchronization system:
Start-stop synchronization (2 stop bits)
Communications speed:
150/300/600/1200/2400/4800/9600 bps
Communications code:
ASCII (7 bits)
Error detection:
Vertical parity (even) and FCS (frame check
sequence)
Interface:
RS-232C/RS-422/RS-485
Definition of Terminal: DTE (Data Terminal Equipment)
D0
Start
bit
D1
D2
D3
D4
D5
D6
Parity
bit
2 stop
bits
The E5AF RS-232C is defined as DTE (Data Terminal Equipment). This
means that a carrier detect (CD) signal for the host computer is not sup-
ported. If a CD signal is needed, it must be provided (via the +12 V terminal)
on the host computer side.
The communications specifications of the E5AF are the same as those of the
E5AX, except for the commands that are used for the fuzzy function of the
E5AF.
3--5
Communications and Error Control
The communications protocol for the E5AF/E5EF is a special conversational
type. The first right to send belongs to the host computer, and the right is
transferred with each block sent. Whenever a command block is sent, a re-
sponse block is sent in return.
3--5--1
Communications Control Procedures
@
Controller no.
Header code
Text
FCS
Terminator
@
Controller no.
Header code
Text
FCS
Terminator
@
Controller no.
Header code
Text
FCS
Terminator
@
Controller no.
Header code
Text
FCS
Terminator
Command block
Command block
Response block
Response block
E5AF/E5EF
Host
Section 3--5
Содержание E5AF
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