KEYENCE Visual KV Series - Manual (Page 111)

2.4 Instruction Details
1
2
3-87 Chapter 2 Instructions
Note 3: The HSP instruction must be specified when the INT instruction or high-
speed counter is used.
Note 4: When special utility relay 2813 and HSP instruction turn ON at the same
time, priority is given to the HSP instruction and the time constant is changed to 10
µs.
Note 5: Connect a non-contact input for the HSP instruction to prevent a contact
bounce from being entered.
Details of HSP Instruction
This section describes the operation of the HSP instruction.
■ Input signal width
Even if the input signal width is shorter than the scan time, the signal can be fetched
when it turns ON during input process as in 1). However, it cannot be fetched when
it turns ON any other time than the input process as in 2).
For reliable signal reception, the input signal width must be longer than the scan
time as in 3).
Scan time < Input signal width < Normal time constant (10 ms ± 20%)
■ Switching the input time constant of expansion units
Expansion input unit Expansion I/O unit
KV-E4X KV-E4XT(P)
KV-E8X KV-E4XR
KV-E16X
The input time constant of an expansion unit is initially set to 10 ms.
It can be changed to 10 µs by creating a ladder program or by using the Access
Window, the LADDER BUILDER for KV programming support software, or with the
KV-P3E(01) handheld programmer.
Change the values of special utility relays 2609 to 2612.
Operands
Key operation
HSP
OFF
ON
1) 2) 3)
Scan time
Output device
Program
execution
Program
execution
Program
execution
Scan time Scan time
Inputdevice
Output device Output device
Inputdevice Inputdevice
Special utility relay Description
2609 Input time constant of 1st unit. OFF: 10 ms, ON: 10 µs
2610 Input time constant of 2nd unit. OFF: 10 ms, ON: 10 µs
2611 Input time constant of 3rd unit. OFF: 10 ms, ON: 10 µs
2612 Input time constant of 4th unit. OFF: 10 ms, ON: 10 µs
FUN
SET
1
AND
8
Operand
(Relay No.)
ENT
R-SRCH
ENT
R-SRCH
KV-300 KV-10 KV-16 KV-24 KV-40/80
0000 to 0009 0000 to 0005 0000 to 0009 0000 to 0015 0000 to 0107
KVNKA Chap 02_4aP.p65 08.3.11, 11:58 AM 87