Delta AS Series Programming Manual page 561

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AS Ser ies Pro gra mm in g M anu al

Note 1: All SM special flags in the above table are OFF by default.

Note 2: When SM under "Count-up/count-down function" is OFF, it indicates that the corresponding counter counts up or

displays that it is counting up. If SM is ON, it indicates that the corresponding counter counts down or displays that

it is counting down.

Note 3: The " under Attribute indicates "Read only" and R/W indicates "Read/Write".

Note 4: The SR special registers under "Counting mode" are 1 time frequency input by default. Use 2 for the input value

for double frequency and 4 for four times frequency. Four times frequency is only applicable to the A/B 2-phase

input counter. If the input value is not 1, 2 or 4 in SR, this indicates that the PLC uses one times frequency.

Note 5: All single-phase counters in the table count using one times frequency, and the rising-edge counting mode

changes the input point from OFF to ON.

Note 6: P (Pulse input) and D (Direction) counters can reverse direction. When SM is ON, the counting direction

(up/down) is reversed. For example, when the preset direction input is OFF, the counter counts up. When SM

switches to ON, the counter changes to count down.

Note 7: Available for FW V1.08 or later.

Count-up/count-down function

Starting the

Reversing the

Reset function

counting only

Supports one

counting only

Supports one

counting only

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