Automationdirect.com D4-454 PLC User Manual page 201

Accumulating Timer (TMRA)
The Accumulating Timer is a 0.1 second two input timer that
will time to a maximum of 9999999.9. The TMRA uses two
timer registers in V-memory.
Accumulating Fast Timer (TMRAF)
The Accumulating Fast Timer is a 0.01 second two-input timer
that will time to a maximum of 999999.99. The TMRA uses
two timer registers in V-memory.
Each timer uses two timer registers in V-memory. The preset
and current values are in double word BCD format, and the
decimal point is implied. These timers have two inputs, an
enable and a reset. The timer starts timing when the enable
is on and stops when the enable is off (without resetting the
count). The reset will reset the timer when on and allow the
timer to time when off.
Timer Reference (Taaa): Specifies the timer number.
Preset Value (Bbbb): Constant value (K) or V-memory.
Current Value: Timer current values are accessed by referencing the associated V or T
memory location. For example, the timer current value for T3 resides in V-memory, V3.
Discrete Status Bit: The discrete status bit is accessed by referencing 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 would
be T2.
NOTE 1: The accumulating timer uses two consecutive V-memory locations for the 8-digit value,
therefore two consecutive timer locations. For example, if TMRA T1 is used, the next available
timer number is T3
NOTE 2: A V-Memory preset is required if the ladder program or an Operator Interface panel is
used to change the preset.
Operand Data Type
Timers
V-memory for preset values
Pointers (preset only)
Constants (preset only)
Timer discrete status bits
Timer current values
NOTE: The DirectSOFT programming software uses separate references, such as "T2" for discrete
status bit for Timer T2, and "TA2" for the current value of Timer T2.
Chapter 5: Standard RLL Instructions
aaa
A/B
T 0 – 376
V – –
P – –
K – –
T/V
V /T**
D4-454 PLC User Manual, 1st Edition, Rev. D
Enable TMRA
B bbb
Reset
Preset
Enable TMRAF
B bbb
Reset
Preset
D4-454 Range
bbb
– –
1400 – 7377
10000-37777
1400 – 7377
10000-37777
0 – 99999999
0 – 377 or V41100 – 41117
0 – 377
T aaa
Timer #
T aaa
Timer #
5-41