Mitsubishi Electric MELSEC iQ-R Series - Counting up or down the Current Value (1-Phase Input); Special Counter Instructions

7 APPLICATION INSTRUCTIONS
7.13 Special Counter Instructions
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7
7.13 Special Counter Instructions
Counting up or down the current value (1-phase input)
UDCNT1
This instruction updates the current value of the specified counter.
■Execution condition
Setting data
■Descriptions, ranges, and data types
*1 Only labels assigned to device (X) can be used.
*2 Only labels assigned to device (C) can be used.
■Applicable devices
*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.
Ladder ST
ENO:=UDCNT1(EN,s1,s2,d);
FBD/LD
Instruction Execution condition
UDCNT1
Operand Description Range Data type Data type (label)
(s1) (s1)+0: Count input number  Bit ANYBIT_ARRAY
*1
(Number of elements:
2)
(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
 Device name ANY16
*2
(s2) Set value -32768 to 32767 16-bit signed binary ANY16
EN Execution condition  Bit BOOL
ENO Execution result  Bit BOOL
Operand Bit Word Double word Indirect
specification
Constant Others
X, Y, M, L,
SM, F, B, SB,
FX, FY
J\ T, ST, C, D, W,
SD, SW, FD, R,
ZR, RD
U\G, J\,
U3E\(H)G
Z LT, LST,
LC
LZ K, H E $
(s1) 
*1
       
(d) 
*2
     
(s2)         
RnCPU
RnENCPU
RnSFCPU RnSFCPURnPCPURnPCPU
(Standard) (Safety) (Redundant) (Process)
(s1) (d) (s2)
EN ENO
ds1
s2