GE VersaMax Manual page 427

13
IC200MDD841
Mixed Module, 24VDC Positive Logic Input 20 Points / Output 12 Point /
(4) High Speed Counter, PWM, or Pulse Train Configurable Points
Default Operation
The default parameters of this module can be used in many applications. The module can
be software-configured when it is installed in a VersaMax PLC system, or an I/O Station
controlled by a Network Interface Unit that is version 2.0 or above. . In its default mode,
the module operates as described below.
Inputs 1 - 8 are one group of high-speed counter inputs. These inputs operate as:
our Type A counters.
F
Each counter counts upward.
When a counter reaches its upper limit, it wraps around and starts over.
Inputs 9 - 16 are one group of standard inputs with a common return.
Inputs 17 - 20 are one group of standard inputs with a common return.
Four of the outputs are High-speed Counter outputs. Each High-speed Counter output is
dedicated to a corresponding High-speed Counter input.
Eight additional outputs are standard outputs.
The counter outputs use a default ON preset of +32,767, and an OFF preset of 0. If the
count reaches the ON preset, the counter's output is turned on. If the count reaches the
OFF preset, the counter's output is turned OFF.
When the system is in Stop mode, the High-speed Counter outputs continue to respond to
the counter inputs and the standard outputs turn off. Output presets continue to operate as
if the CPU/NIU were present, changing state to reflect the counter Accumulators.
In default mode, the module can temporarily change this basic operation in response to up
to four commands from the CPU or NIU. These commands can be sent to the module in
its regular output data.
Each counter output can be turned on or off on command.
Each counter can be reset to 0.
Each counter's accumulator (current count) register can be loaded with any value from
0 to 32757.
Each counter's lower and upper limits can be changed.
Each counter's accumulator can be incremented by a specific amount above its present
actual value.
The count direction can be changed to down (or back to up).
The timebase for each counter's counts-per-timebase, which measures its rate of
counting, can be changed from1000mS to any value from 10mS to 1000mS.
Each counter's preload value can be changed.
13-4 VersaMax® Modules, Power Supplies, and Carriers User's Manual – March 2003 GFK-1504K