Special Counter Instructions; Counting Up Or Down The Current Value (1-Phase Input) - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

7.13

Special Counter Instructions

Counting up or down the current value (1-phase input)

UDCNT1
RnPCPU RnPCPU
RnCPU RnENCPU
(Process) (Redundant)
This instruction updates the current value of the specified counter.
Ladder
(s1) (d) (s2)
FBD/LD
EN ENO
s1 d
s2
■Execution condition
Instruction
UDCNT1
Setting data
■Descriptions, ranges, and data types
Operand Description
(s1) (s1)+0: Count input number
(s1)+1: Count up/down flag
Off indicates count-up (counting up the current value).
On indicates count-down (counting down the current value).
(d) Number of the counter (device name) to be counted by the
UDCNT1 instruction
(s2) Set value
EN Execution condition
ENO Execution result
*1 Only labels assigned to device (X) can be used.
*2 Only labels assigned to device (C) can be used.
■Applicable devices
Operand Bit
X, Y, M, L, J\
SM, F, B, SB,
FX, FY
*1
(s1)  
 
(d)
(s2)  
*1 Only X can be used. Note, however, that it can be used only within the range of the number of I/O points (the number of points that can
access I/O modules).
*2 Only C can be used.
RnSFCPU RnSFCPU
(Standard) (Safety)
Execution condition
Word
T, ST, C, D, W, U\G, J\,
SD, SW, FD, R, U3E\(H)G
ZR, RD
 
*2
 
 
ST
ENO:=UDCNT1(EN,s1,s2,d);
Range Data type
 Bit
 Device name
-32768 to 32767 16-bit signed binary
 Bit

Bit
Double word Indirect
specification
Z LT, LST, LZ
LC
   
   
   
7 APPLICATION INSTRUCTIONS
7.13 Special Counter Instructions
7
Data type (label)
*1
ANYBIT_ARRAY
(Number of elements:
2)
*2
ANY16
ANY16
BOOL
BOOL
Constant Others
K, H E $
   
   
   
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