Omron OMNUC W R88A-NCW152-DRT, Manual

Page: 157 / 292

6 DeviceNet Communications
6.7.1 Basic Operation
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6.7 Command Method Using the Remote I/O Communications
This section describes the basic operation of the DeviceNet Unit and command method using
the Remote I/O communications.
6.7.1 Basic Operation
The basic operation of the DeviceNet Unit is shown below.
1. Once DeviceNet communications have started, check that the Unit is ready (i.e., that
READY is 1).
2. Set the Emergency Stop Command (STOP) to 1 to clear emergency stop status.
3. Set the Servo ON Command (SVON) to 1 to turn ON the servo.
Confirm that the servo of the W-series Servo Driver is ON by checking the status of
SVON_R.
4. Set a command.
5. Confirm that the Progressing Flag (PRGS) has changed to 1.
6. Monitor the Progressing Flag (PRGS). When it changes to 0 again, the operation has
been completed.
7. Set another command.
6.7.2 Command Method
For the following commands that involve movement, always wait until one command has
been completed before executing another command. If commands are executed simulta-
neously or while the axis is travelling, a Command Warning (A.95) will occur.
• JOG Command
• Step Command
• Station Command
• Point Table Command
• Origin Search Command
• Move command based on a command code
The Emergency Stop, Servo ON, Cancel, and Hold Commands are effective any time.
„ Servo ON/OFF Command
When the Servo ON Command (SVON) is changed from 0 to 1, current is supplied to the
Servomotor. When it is changed from 1 to 0, the current is not supplied.
If DeviceNet communications time out, the DeviceNet Unit automatically enters Servo OFF
status. To restart communications, the Servo ON Command must be changed from 0 to 1.
Fig. 6.1 Servo ON/OFF Signal
SVON
SVON_R