KEYENCE Visual KV Series - Manual (Page 101)

2.4 Instruction Details
1
2
3-77 Chapter 2 Instructions
Application of UDC instruction
■ Multi-level UP/DOWN counter
UP/DOWN counter which allows a count setting value up to 99,990,000.
Coding
The example below outputs the high-order 4 digits of 8-digit BCD to UDC001 and
the low-order 4 digits of 8-digit BCD to UDC000.
Low-order 4 digits
0001
0002
0003
UDC 000
UP
#09999
DW
RES
C000
C000
0001
0002
0003
UDC 001
UP
#09999
DW
RES
0001
0002
BCD
BCD
High-order 4 digits
Line No. Instruction Operand
0000 LD 0001
0001 LD 0002
0002 LD 0003
0003 UDC 000 #09999
0004 LD C000
0005 AND 0001
0006 LD C000
0007 AND 0002
0008 LD 0003
0009 UDC 001 #09999
0004 C000
LDA TBCD
0500
STA
C001
LDA TBCD
0600
STA
Up-input
Down-input
Low-order
4 digits
High-order
4 digits
UDC
KVNKA Chap 02_4aP.p65 08.3.11, 11:58 AM 77