Automationdirect.com DL06 - Page 201

DL06 Micro PLC User Manual, 3rd Edition, Rev. E
5-40
Chapter 5: Standard RLL Instructions
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A
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Discrete Status Bit: The discrete status bit is referenced by the associated T memory location.
Operating as a “timer done bit”, it will be on if the current value is equal to or greater than
the preset value. For example, the discrete status bit for Timer 2 is T2.
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 Timer discrete status bits and current value are accessed with the same
data reference. DirectSOFT uses separate references, such as “T2” for discrete status bit for Timer
T2, and “TA2” for the current value of Timer T2.
You can perform functions when the timer reaches the specified preset using the discrete status
bit. Or, use comparative contacts to perform functions at different time intervals, based on one
timer. The examples on the following page show these two methods of programming timers.
T aaa
aaa
T
TMR
B bbb
Preset
Timer #
TMRF
B bbb
Preset Timer #
Operand Data Type DL06 Range
A/B
aaa bbb
Timers T 0–777 ––
V-memory for preset values 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
Timer discrete status bits T/V 0–377 or V41100–41117
Timer current values V /T** 0–377
DS Used
HPP Used
Timer (TMR) and Timer Fast (TMRF)
The Timer instruction is a 0.1 second single input timer
that times to a maximum of 999.9 seconds. The Timer Fast
instruction is a 0.01 second single input timer that times up
to a maximum of 99.99 seconds. These timers will be enabled
if the input logic is true (on) and will be reset to 0 if the input
logic is false (off). Both timers use single word BCD values for
the preset and current value. The decimal place is implied.
Instruction Specifications
Timer Reference (Taaa): Specifies the timer number.
Preset Value (Bbbb): Constant value (K) or a V-memory
location specified in BCD.
Current Value: Timer current values, in BCD format,
are accessed by referencing the associated V or T memory
location*. For example, the timer current value for T3
physically resides in V-memory location V3.