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Module No.
70
Category
Logical Operation
Module Name
Edge-triggered Counter
Module Code Name
ECOUNTER
Module Input
[Computational Expression]
If IN3 changes (from 0 to 1 or from 1 to 0), then OUT = previous OUT + P4.
IN1
Enable flag
IN2
Initialization flag
IN3
Counter input
IN4
Initial value
(for decremental counting)
IN1
IN5
NO
IN6
IN7
IN3
IN2
IN4
IN1 = 1
Counter input
YES
Enable flag
IN8
IN2 = 0→1
Initial value
(for countdown)
Module Parameter
P1
Limiting action specification
P2
Counter type specification
P3
Counter input type specification
P4
Augend or subtrahend
Initialization flag
Momentary
stop
P1
Limiting
action specification
Module Output
OUT
Current value of edge-triggered
counter
Work Area
Augend or subtrahend
P4
3
Edge-triggered
counter
Limitation on Usage
Current value
P2
Counter
type specification
Counter
input type
specification
P3
OUT
[TIP]
IN1: Enable flag (IN1 = 0: Stop counting momentarily; IN1 = 1: Continue counting)
IN2: Initialization flag (IN2 = 0: Do not initialize; IN2 = 1: Initialize the count)
IN4: Initial value for decremental counting (P2 = 1)
P1: Limiting action specification (P1 = 0: Do not limit; P1 = 1: Limit)
If limited, the incremental counter stops at FFFFh (65535 in the decimal system)
and the decremental counter at 0h (0 in the decimal system).
If not limited, the counter continues counting.
For example, if the module operates as a decremental counter and the count is 2
and the subtrahend is 4, the next count is FFFEh (65534 in the decimal system).
P2: Counter type specification (P2 = 0: incremental counter; P2 = 1: decremental counter)
P3: Counter input type specification (P3 = 0: rising-edge counter; P3 = 1: falling-edge counter)
P4: Augend if the module is operated as an incremental counter (P2 = 0); subtrahend
if the module is operated as a decremental counter (P2 = 1);
[NOTE]
Operation when no limiting action is specified
• If the incremental counter is specified, then OUT = previous OUT + P4 - 10000h
(65536 in the decimal system).
• If the decremental counter is specified, then OUT = previous OUT - P4 + IN4.
: Signed four-byte data;
4-68
: Signed two-byte data;
: Flag of 0 or 1; ⫻: No output
IM 5G1A11-02E