Type B Counter - GE VersaMax Manual

13
IC200MDD841
Mixed Module, 24VDC Positive Logic Input 20 Points / Output 12 Point /
(4) High Speed Counter, PWM, or Pulse Train Configurable Points

Type B Counter

The Type B counter uses two counter input signals for A-Quad-B counting. The phase
relationship between the counter inputs (A & B) determines whether the accumulator is
incremented or decremented on a transition of either counter input.
The count direction is up if A leads B.
The count direction is down if A lags B.
The Type B counter has a Strobe register, a Preload register, a 16-bit Accumulator, and a
Counts-per-Timebase register. These operate as described for Type A counters.
The Type B counter can have one output that is activated based on selected On and Off
preset values.
13-12 VersaMax® Modules, Power Supplies, and Carriers User's Manual – March 2003
A
B
COUNT
Accumulator
N
Value
A
B
COUNT
Accumulator
N
Value
PRELOAD
COUNT A
COUNT B
PRELOAD
STROBE
INPUT
STROBE
N + 6
Up/Down Counter
Preload Value
(16 bit)
Accumulator
(16 bit)
Counts Per
Time Base
(16*bit)
Strobe Register
On/Off Presets
N + 6
OUTPUT
GFK-1504K