YOKOGAWA F3YP14-0N, Руководство пользователя

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7-12
IM 34M6H55-02E 1st Edition : Apr 1, 2002-00
7.1.5 Origin Search
There are two ways to perform origin search operation: normal and automatic. In the
normal origin search operation, the origin search behavior is arbitrarily defined by an
application program. The automatic origin search operation uses entry parameters to
define the origin search behavior.
This section describes the normal origin search operation. For information on the
automatic origin search operation, see Section 7.1.6, “Automatic Origin Search.”
There are three external contact inputs related to the normal origin search. The origin
search mode specifies the action when each rising and falling edge of these three inputs
(six in total) is detected during the origin search using bit patterns (2 bits for each edge,
hence 12 bits in total).
In the example below, the search moves in the negative direction with the following
behavior: (1) Stops immediately when a rising edge of the negative-direction limit is
detected. (2) Decelerates and stops when a rising edge of the origin input is detected.
(3) Shifts to a Z-phase search when a falling edge of the origin search is detected. In
this case, the origin search mode is set as follows:
0 0 0 0 1 1 0 0 0 0 0 0 1 0 0 1
(“0C09” in hexadecimal)
For details on the origin search mode, see Section 3.5, “Origin Search.”
Figure 7.8 Example of Origin Search Operation
z z z z
Conditions for Command Execution:
- The axis is not in an error state.
- The axis is in the End-of-Positioning status.
- No other command is being executed.
z
z z
z
Note:
- If any of the conditions is not satisfied, the command is ignored and the Command
Execution ACK relay is not set. If the command is issued when the axis is in an
error state or not in the End-of-Positioning status, an alarm code is set in the alarm
status. The alarm code is automatically cleared when the Execute Command
output relay is reset. For details on alarm codes, see Section 8.3, “Alarm Codes.”
- The origin search ends when a specified external contact input is detected and the
axis is stopped. Change the parameters and begin the origin search again if you
want to continue the search in another direction or at a different speed.
- In the following cases, an error occurs and the origin search is aborted:
- The limit input of the origin search direction is set to be ignored but it is
detected.
- After shifting to Z-phase search, the limit switch of the origin search direction is
detected. This causes an error regardless of the setting.
- After shifting to Z-phase search, no Z-phase pulse is detected within the origin
search Z-phase search range.
- If you wish to change the setup values according to the status of an external contact
input at the beginning of the origin search, read the state in the Contact Input Status
before executing the origin search.
Negative-
direction
limit input
Origin input
(2) (3) (1)
Negative
direction
Positive
direction
F070108.VSD