Omron V530-R2000 User Manual page 93

SECTION 7
Host Communications
n Flowcharts
§ Using the Serial Interface for Both Input and Output
Commands for the V530-R2000 are written to the Read Area in PLC memory. The
V530-R2000 automatically reads these commands and executes them. Reading
results are written to the PLC.
Checks Read Area for
command.
Sends a command to clear.
Executes the command.
No
Writes data to Write Area.
A Host Link error occurs and the ERROR output terminal turns ON if there is no response
within 5 seconds. It is assumed that the line is broken or the PLC is not working correctly.
V530-R2000
76
User's Manual
V530-R2000
Controller
While the command is being executed, the BUSY output terminal
is ON.
Command
requires outputting
reading data?
Yes
Read Area
Write Area
PLC
Unit number: 00 (fixed)
Returns a command.
Clears the contents of the
Read Area to all zeros.
Returns write completed
response.
The rest of the operation is not per-
formed if the command format is in-
correct.