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DL205 User Manual, 4th Edition, Rev. B
5–42
Chapter 5: Standard RLL Instructions - Timer, Counter and Shift Register
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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 ).
Instruction Specifications
Timer Reference (Taaa): Specifies the timer number.
Preset Value (Bbbb): Constant value (K) or a V-memory
location. (Pointer (P) for DL240, DL250-1 and DL260).
Current Value : Timer current values 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.
Discrete Status Bit : The discrete status bit is referenced by the
associated T memory location. 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 would be T2.
NOTE: A V-memory preset is required only if the ladder program or an Operator Interface unit must change
the preset.
NOTE: * Both the Timer discrete status bits and the current value are accessed with the same data
reference with the HPP. Direct SOFT 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 the comparative contacts to perform functions at different time intervals
based on one timer. The examples on the following page show these methods of
programming timers.
T aaa
aaa T T MR
B bbb
Preset T im er #
T MR F
B bbb
Preset T im er #
Operand Data
Type
DL230 Range DL240 Range DL250-1 Range DL260 Range
B aaa bbb aaa bbb aaa bbb aaa bbb
Timers T 0-77 0-177 0-377 0-377
V-memory for
preset values V
– 2000-2377 – 2000-3777 –
1400-7377
10000-17777
–
1400-7377
10000-37777
Pointers
(presets only) P
2000-3777
1400-7377
10000-17777
1400-7377
10000-37777
Constants
(presets only) K
– 0-9999 – 0-9999 – 0-9999 – 0-9999
Timer discrete
status bits T/V*
0-77 or V41100-41103 0-177 or V41100-41107 0-377 or V41100-41117 0-377 or V41100-41117
Timer current
values V/T*
0-77 0-177 0-377 0-377
þ
þ
þ
þ
230
240
250-1
260
DS Used
HPP Used