KEYENCE Visual KV Series - Manual (Page 90)

2.4 Instruction Details
3-66
2
Chapter 2 Instructions
Example
Coding
Description
• Output relay 0500 remains ON after input relay 0000 turns OFF. Output relay
0500 turns OFF when input relay 0001 turns ON.
• SET instruction sets a latch whereas RES instruction resets it.
• RES instruction not only turns OFF relay coils but serves as a reset signal when
a timer or counter is used as an operand.
Note: The SET and RES instructions can be entered in any order. Note, however,
that priority is given to the instruction that is entered last.
In the above example, when both 0000 and 0001 are ON, RES has priority over
SET, causing 0500 to remain OFF.
Tips
Differences between SET/RES and KEEP
Basically , SET/RES and KEEP ( ➮ See above and p. 3-80) serve the same purpose.
• SET and RES can be used separately. Therefore, RES can be placed before
SET.
Another instruction may be placed between SET and RES.
• KEEP needs only three lines of program, therefore saving memory space when
used a number of times.
Operands
Key operation
SET: Set
RES: Reset
Turns ON specified relay when input is ON
and enables this relay to remain ON.
Turns OFF specified relay, timer, or counter
when input is ON.
SET
1
RES
0
nnnn
RES
nnnn
SET
0000
0001
0500
SET
0500
RES
Line No. Instruction Operand
0000 LD 0000
0001 SET 0500
0002 LD 0001
0003 OUB 0500
0001 0002 0001
0002 C000
RES
#00100
00000
C000
#00100
0000
C000
0000
0001 0500
SET
0500
RES
0000
0001
RES
KEEP
0500
SET
LD 0000
RES 0500
LD 0001
SET 0500
LD 0000
LD 0001
KEEP 0500
SET
1
RES
0
Operand
ENT
R-SRCH
Operand
ENT
R-SRCH
:
:
SET / RES
Visual KV KV-300 KV-10/16 KV-24/40/80
0500 to 1915 0500 to 1915 0500 to 1915 0500 to 1915
2009 2009 2009 2009
2100 to 17915 2100 to 17915 2100 to 2915 2100 to 6915
T000 to T249 T000 to T249 T000 to T063 T000 to T119
C000 to C249 C000 to C249 C000 to C063 C000 to C119
CTH0 to CTH1 (RES only)
CTC0 to CTC3 (RES only)
KVNKA Chap 02_4aP.p65 08.3.11, 11:57 AM 66