
B-63983EN/02 5.WINDOW FUNCTIONS
- 413 -
5.2 LOW-SPEED RESPONSE AND HIGH-SPEED RESPONSE
There are two types of window function - one executed at high speed
and the other executed at low speed.
TYPE
Number of scans to be executed until the window
instruction is completed
LOW
TWO SCAN TIMES OR MORE (Depends on the CNC
processing priority and operation status.)
HIGH 1 SCAN TIME
When using the low-speed response window function, set ACT to 0
immediately after the data transfer end data (W1) is set to 1 for the
window instruction. For details, see "CAUTION" below.
CAUTION
1 The window instruction of a low-speed response is
controlled exclusively with the other window
instructions of low-speed response.
Therefore, when the data is read or written
continuously, it is necessary to clear ACT of the
functional instruction to 0 once when the completion
information (W1) become 1.
It does not work about ACT=1 of the other window
instructions of low-speed response such as W1=1
and ACT=1 of the window instruction of a low-speed
response.
The window instruction of a high-speed response is
not exclusively controlled like a low-speed response.
Therefore, when the data is read or written
continuously, yow need not make ACT=0.
2 The window instruction of a low-speed response
should be executed with the lowest required
frequency. If some window instruction of a low-
speed response is executed continuously with a
high frequency, the completion of the other window
instruction of low-speed response will be delayed, or
may not be done.