Keyence IV Series Uživatelský manuál stáhnout pdf (Strana 90)

5-32

- IV Series User’s Manual (Field Network) -

Operating procedure of the data I/O communication

This section explains the method for communicating from the PLC to the IV series using data I/O

communication.

Reading out the overall status result of the IV series (Handshake control

[Disabled])



When a trigger is successful

Trigger request

Result of A

A B

Result of B

Trigger response

BUSY

Imaging status

Result update complete

Result available

Result No.

Overall judgment

(1) Execute a [Trigger request]. (0 → 1)

(2) If the trigger is valid, [Trigger response] will change from 0 to 1.

(3) [BUSY] will change from 0 to 1 when a trigger is input.

(4) [BUSY] will change from 1 to 0 when the judgment process ends.

At this time, the [Result update complete] BIT will be switched and [Overall judgment] will be updated.



[Result update complete] will switch to “1” if its value was “0” after the previous judgment update (or

from “0” to “1” if the previous value was “1”).



[Result available] will switch from 0 to 1 at the timing when the rst judgment process has been

conrmed; and the new value will be retained thereafter.



[Result available] will be reset in the following conditions:



If handshake control is set to [Disabled]

- When the program is switched

- When the unit’s status is switched from “Setting” to “RUN”

- When a buffer clear request is issued



If handshake control is set to [Enabled]

- When a buffer clear request is issued



[Result No.] will be counted up each time the status result is updated.

The upper limit value is 32767. If the maximum value is exceeded, it will go back to 0 and start counting

up again.



[Result No.] will also count the judgment process counts that were skipped due to the data I/O cycle

setting.



[BUSY] and [Imaging] may be skipped in some data I/O cycle settings. It is therefore necessary to take

the imaging condition into consideration when setting the data I/O cycle.

Data I/O communication

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