User Manual

3-1 Overview of DeviceNet Communication
3-3
3
Communicating with the GT-70A series
- DeviceNet Compatible Network Unit DL-DN1 User’s Manual (GT-70A) -
The master unit of the DeviceNet system can use the following functions:
* When you use this function through explicit messaging, use a command parameter
of each function assigned for external inputs (1 to 5). For details, refer to
"Command Parameter List for GT-70A Series" (page 3-28).
 I/O Communication
• The output signal, comparator value, and error status of sensor amplifiers ca n be
com
municated without the need of a ladder program.
• By using the IN and OUT areas as handshake signals, the master unit can execute
external inputs to the sensor amplifier or change setting values.
"I/O Communication" (page 3-4)
 Explicit Messaging
The master unit can use explicit messaging commands to directly read
/write
parameter values of
sensor amplifiers. All functions that can be executed on sensor
amplifiers are available through explicit messaging.
"Explicit Messaging" (pa ge 3-20)
Overview of Communication Methods
Function of sensor
amplifier
Communication Methods.
I/O Communication
p. 3-4
Explicit Messaging
p. 3-20
Read sta tus
Ye s
Ye s
Read output
Read current value
Execute external input*
Change bank number
Rewrite setting value
Motion command
No
Read current value,
setting, and status
Read data with decimal point
information
Rewrite setting
Lock all