Movement Of Data Carrier And Command Status - Omron V600-CD1D-V2 Operation Manual

Movement of Data Carrier and Command Status

4-1

Movement of Data Carrier and Command Status

Communications Control Procedure
Host computer
Host communications:
Communication between host
computer and ID Controller
1, 2, 3...
Command Reception
Command Wait Status
Command Processing
Status
Polling Auto Subcommand
Wait Status
24
The host communication control procedure conforms to the OMRON SYSWAY
procedure.
Host
communication
ID Controller
(1)
Command
(3)
Response
Description
1. The host computer transmits commands to the ID Controller.
2. The ID Controller analyzes the commands from the host computer, ex-
ecutes lower communications, and writes/reads data to/from a DC.
3. When a read command has been executed, the ID Controller transmits the
contents of the data it has read and a responds to the host computer. When a
write command has been executed, the Controller transmits a response in-
dicating the end of processing to the host computer.
The ID Controller assumes the following status in response to a command sent
from the host computer:
In this status, the ID Controller processes no command and is ready to receive
any command.
In this status, the ID Controller receives and processes a read/write (including
expansion command) or auto read/write command, and returns a response to
the host computer after the processing has ended. While the ID Controller is in
this status, the Controller only receives a command that will terminate the cur-
rent command, and an abort command.
When the ID Controller has received a polling auto command,
a) the Controller returns the result of the processing as a response to the
host computer after the processing with the DC has been completed and
a polling processing inquiry command has been sent from the host com-
puter.
b) the processing of the ID Controller can be terminated by a polling pro-
cessing termination command from the host computer.
When the ID Controller is in the polling auto subcommand wait status, it can re-
ceive only a polling subcommand (inquiry, termination) and an abort command.
R/W Head or
Data Carrier
R/W Antenna
Lower communications:
(2)
Communication between
R/W Head and Data Carrier
Section 4-1