32-Bit Counters (Hc/Ac); Index Registers (E) - Delta AH Series Operation Manual

AH Mo t io n C on tr o ll er – O p er a t io n M a nu a l
4. You can use either the constant or the value in the register as the setting value of the counter.
5. The setting value of the counter can be a positive or a negative. If the counter counts up from 32,767, the next current
value becomes -32,768.

5.2.14. 32-bit Counters (HC/AC)

HC: The 32-bit general-purpose addition/subtraction counter
AC: The 32-bit counters used specifically for motion axis. The function of AC is the same as that of HC
 Specifications of the 32-bit counter
Item
Type
Number
Direction
setting value
Specification of the setting value
Change of the current value
Output contact
Reset
_5
Action of the contact
1. Setting range: -2,147,483,648~2,147,483,647
2. The switch between the 32-bit general-purpose addition counters and the 32-bit general-purpose subtraction counters
depends on the states of the special auxiliary relays SM621~SM684. For example, the counter HC0 is the addition
counter when SM621 is OFF, whereas HC0 is the subtraction counter when SM621 is ON.
3. You can use either the constant or the value in the data registers as the setting value of the counter, and the setting
value can be a positive or a negative. If you use the value in the data registers as the setting value of the counter, the
setting value occupies two consecutive registers.
4. For the general-purpose counter, the current value of the counter is cleared when there is a power cut. If the counter is
the latched one, the current value of the counter and the state of the contact before the power cut will be retained. The
latched counter counts from the current value when the power supply is restored.
5. If the counter counts up from 2,147,483,647, the next current value becomes -2,147,483,648. If the counter counts
down from -2,147,483,648, the next current value becomes 2,147,483,647.

5.2.15. Index Registers (E)

The index register is the 16-bit data register. It is like the general register in that the data can be read from it and written
into it. However, it is mainly used as the index register. The range of index registers is E0~E13.
Refer to 5.3.5 Modifying a Symbol with an Index Register for more information.
5 - 1 0
General type
HC0~HC63
Counting up/down
-2,147,483,648~+2,147,483,647
The setting value can be either the constant or the value occupying two data
registers.
The counter keeps counting after the value of the counter matches the setting
value.
The contact is ON when the value of the addition counter matches the setting
value.
The contact is reset to OFF when the value of the subtraction counter matches
the setting value.
When the instruction RST is executed, the current value is cleared to zero, and
the contact is reset of OFF.
After the scan is complete, the contact acts.
32-bit counter