Omron E3X-DRT21 Operation Manual page 76

Overview of RS-422 Communication Unit
Operation
Reading from variable area,
parameter area, and other data
Writing to parameter area
Operation commands
The following types of CompoWay/F messages communications are sup-
ported.
Communications details
Reads parameters, such as status data,
incident light levels, and thresholds.
Writes (sets) parameters, such as the maxi-
mum sensitivity and thresholds.
Perform operations such as teaching and
fine-tuning
Note The following table lists the CompoWay/F commands that can be
sent to the Communication Unit.
Command
Read from Variable
Area
Read from Parame-
ter Area
Write to Parameter
Area
Read Model
Attributes
Read Controller Sta-
tus
Echoback Test
Operation com-
mands
Note When using a PLC as the master to send CompoWay/F message communi-
cations, CompoWay/F commands are executed from the Serial Communica-
tions Board or Unit using the following standard system protocol macros.
Sequence No.
600 Send/receive with ASCII conver-
sion (with response)
601 Broadcast with ASCII conver-
sion (with no response)
Executes Read Status Data, Read Incident Light Level, Read
ON Incident Light Level, and Read OFF Incident Light Level.
Executes Read Number of Sensors Connected, Read Thresh-
old Setting, Read Basic Settings, Read Timer Setting, Read
Hysteresis Width, Read Custom Flags, and Read Special
Flags.
Executes Write Number of Sensors Connected, Write Thresh-
old Setting, Write Basic Settings, Write Timer Setting, Write
Hysteresis Width, Write Custom Flags, and Write Special
Flags.
Reads Communication Unit model information.
Reads the operating status and the number of Sensors that
can communicate.
Executes Echoback Test.
Executes Adjust Maximum Sensitivity, Teach One Point,
Teach First Point, Teach Second Point, Teach First Position,
Teach Second Position, Start Zero Reset, Disable Zero
Reset, Start Flashing, Stop Flashing, Initialize Sensor Set-
tings, and Reset.
Communications sequence
name
Section 4-1
Number of Conditions
Sensors
16 max. Not possible when
Mobile Console is
connected.
Details
Summary
Converts the data following the
specified command codes
(MRC, SRC) into ASCII and
sends it to the specified Unit.
The response is converted into
hexadecimal and stored in the
specified words.
Executes sequence number 600
as a broadcast without waiting
for a response.
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