Hardware reference guide

Intelligent/Special Purpose
352
35013379 11/2011
COUNT UP
The input counter is reset to zero if the count direction input is UP and a preset
(hardware or software) or Load Value command is sent to the module.
When counting in the UP direction, the input counter increments to the maximum
value, the next input pulse sets the counter to zero and it continues counting back
up to the maximum value.
COUNT DOWN
The input counter is set to maximum count if the count direction is down and a preset
(hardware or software) or Load Value command is sent to the module.
When counting in the DOWN direction, the input counter is decremented from the
maximum value to zero. The next pulse resets the input counter to the Maximum
value and the increment down starts again.
REMOVE ENABLE
This function disables the input counter, causing it to stop incrementing and hold the
count accumulated prior to disabling.
OUTPUTS
When configured in the count mode, outputs will turn on for defined times when
setpoints or maximum values have been reached.
No output assertion in two 32 bit counter mode or rate sample.
Programmed ON time for outputs can be set for one channel, one output and one
trigger point only.
In a running controller, latched outputs are turned off only by a hardware RESET
input. If no reset is provided, the outputs latched on will turn off when the controller
is stopped.
COUNTER PRESET
This is both a hardware and software function. In the event that both methods are
used, the last one executed has precedence. An input counter will be automatically
preset whenever a new maximum value or rate sample time is loaded.