Automationdirect.com DL06, User Manual

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DL06 Micro PLC User Manual, 3rd Edition, Rev. E
5-47
Chapter 5: Standard RLL Instructions
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A
B
C
D
Instruction Specifications
Counter Reference
(CTaaa): Specifies the counter number.
Preset Value (Bbbb): Constant value (K) or a V-memory location.
Current Values: Counter current values are accessed by referencing the associated V or CT
memory locations*. The V-memory location is the counter lo 1000. For example, the
counter current value for CT3 resides in V-memory location V1003.
Discrete Status Bit
: The discrete status bit is accessed by referencing the associated CT memory
location. It will be on if the value is equal to or greater than the preset value. For example, the
discrete status bit for counter 2 would be CT2.
NOTE: In using a counter inside a stage, the stage must be active for one scan before the input to the
counter makes a 0-1 transition. Otherwise, there is no real transition and the counter will not count.
NOTE: A V-memory preset is required only if the ladder program or an Operator Interface unit must
change the preset.
NOTE: *May be non-volatile if MOV instruction is used.
** With the HPP, both the Counter discrete status bits and current value are accessed with the
same data reference. DirectSOFT uses separate references, such as “CT2” for discrete status bit for
Counter CT2, and “CTA2” for the current value of Counter CT2.
CT aaa SGCNT
B bbb
Preset
Counter #
Operand Data Type DL06 Range
A/B
aaa bbb
Counters CT 0–177 ––
V-memory (preset only) V ––
400-677
1200–7377
7400–7577
10000-17777
Pointers (preset only) P ––
400-677
1200–7377
7400–7577*
10000-17777
Constants (preset only) K –– 0–9999
Counter discrete status bits CT/V 0–177 or V41140–41147
Counter current values V /CT** 1000-1177
DS Used
HPP Used
Stage Counter (SGCNT)
The Stage Counter is a single input counter that increments when
the input logic transitions from off to on. This counter differs
from other counters since it will hold its current value until reset
using the RST instruction. The Stage Counter is designed for
use in RLL
PLUS
programs but can be used in relay ladder logic
programs. When the current value equals the preset value, the
counter status bit turns on and the counter continues to count up
to a maximum count of 9999. The maximum value will be held
until the counter is reset.