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7. GENERAL
TION
QnA
1.3.2
What is non procedure protocol?
"Non procedure protocol" sends and receives arbitrary data between the QC24 and external
devices. The message format is not specified by the QC24 like the dedicated protocols. There-
fore, the user determines the format of the messages to be sent and received. With the non
procedure protocol, a sequence program to send and receive data from the QC24 is necessary.
When the sequence program writes data and a send request to the QC24 buffer memory, the
QC24 sends the written data code, or the written data code converted to the data code matched
to the opposite device, to the external device.
The QC24 converts the data received from the external device
to
a data code matched to the
destination device, then stores it to the buffer memory from which it is read by the sequence
program.
Data was sent.
Please read
It.
D P
r u
I
External
device
The following can be performed using non procedure data communications.
a
PC CPU and external device interaction
Arbitrary data can be exchanged between sequence program and external device.
QnACPU module
Data logging
The PC data can be printed on an RS-232C printer.
Production
dally report
RS-232C
printing
Printer
Reading of data from a terminal
Data can be read by connecting a bar code reader to the PC.
External
device
RS-232C
PC
1 - 7
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