Omron OMNUC W R88A-NCW152-DRT, Manual

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6 DeviceNet Communications
6.7.2 Command Method
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„ Step Command
While the Step Command (STEP) is set to 1, the axis travels in the direction specified as the
movement direction (DIR) at the feed speed for the step distance.
If the Step Command is set to 0 during the step operation, the step operation stops and the
remaining travel distance is canceled.
Fig. 6.5 Step Command
„ Station Command
The station operation starts when the Station Command (STN) is changed from 0 to 1. The
following data must be set before the station operation is started.
• Movement direction: Specify the movement direction (byte 3, bit 1).
• Station number: Specify at the 1 word of bytes 4 and 5.
• Absolute/relative : Specify whether the station number is an absolute value or a relative
value (byte 3, bit 0).
„ Point Table Command
The point table operation starts when the Point Table Command (PTBL) is changed from 0
to 1. The following data must be set before the point table operation is started.
• Point table number: Specified at the 1 word of bytes 4 and 5.
„ Origin Search Command
When the Origin Search Command (HOME) is changed from 0 to 1, the axis travels in the
direction specified in the origin search direction in parameter Pn801 “Origin Search Func-
tion Selection.” If the Origin Search Command is changed from 1 to 0 during origin search,
the origin search stops. Therefore, the Origin Search Command must be maintained to 1
until the origin search has been completed.
Using an Incremental Detection System
When the power is turned ON, the present position is 0 and the Origin Flag (HOME_P) is 0.
When the origin search has been completed, the Origin Flag changes to 1.
STEP
DIR
STEP_R
DIR_R
PRGS