Data Carrier Motion And Command Conditions - Omron V600 Series Operation Manual

Data Carrier Motion and Command Conditions

3-1 Data Carrier Motion and Command Conditions
3-1-1 Communications Control Procedure
Host computer
Host communications:
Communications between host
computer and ID Controller
Explanation
1, 2, 3...
1, 2, 3...
14
The procedure for communications with the host computer is based on
OMRON's SYSMAC WAY Host Link System procedure.
Communications
with host computer
ID Controller
(1)
Command
(3)
Response
1. The host computer sends a command to the ID Controller.
2. The ID Controller interprets the host computer command and executes local
communications, and writes/reads data to/from the DC memory.
3. If it is a read command, the data read out is sent to the host computer as the
response. If it is a write command, a message indicating the completion of
processing is sent to the host computer as the response.
When the V600-CA2A-V
communications with the host computer.
1. The host computer has the initial transmission right, which is transferred to
the ID Controller after command transmission is completed.
2. Once the response is returned from the ID Controller, the transmission right
goes back to the host computer.
The transmission right is transferred by pressing the carriage return key.
Different control procedures are available for the 1 to 1 procedure and the 1 to N
procedure.
The 1 to N procedure is used for connection of multiple (up to four) ID Control-
lers to one host computer. A control number is inserted at the head of all com-
mands and responses to identify the ID Controller. A horizontal parity check is
included to ensure effective error detection.
The 1 to 1 procedure is used when only one ID Controller is connected to the
host computer. The horizontal parity check is not included to simplify the proce-
dure.
R/W Head
Local communications
(2)
is used, the following procedure is used to control
Section 3-1
DC
Local communications:
Communications between
R/W Head and DC