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VersaMax® Modules, Power Supplies, and Carriers User's Manual – March 2003
GFK-1504K
13
IC200MDD841
Mixed Module, 24VDC Positive Logic Input 20 Points / Output 12 Point /
(4) High Speed Counter, PWM, or Pulse Train Configurable Points
The homing sequence is performed as follows:
1.
Optionally, the
Load Home Value
%AQ command can be used to specify a load value
that is different from the one specified in the module configuration.
2.
The
Home Start
%Q bit can be set.
3.
Upon receiving the new %Q bit, the module clears the %I bit,
Home Sequence
Complete.
4.
The module waits for the
Enable Home
signal to transition to a high state. This signal
may be taken from a limit or proximity switch located near the home position.
5.
The next transition to a high state on the
Marker
signal loads the home value into the
counter accumulator, This signal may be taken from a position indicator located on an
electromechanical assembly.
6.
The module disables the home sequence feature and sets the %I bit
Home Sequence
Complete.
The maximum pulse repetition rate of the marker signal and Enable Home must be less
than 2kHz, and the duty cycle for both must be such that the signal is high for at least 250
microseconds.
Up/Down Counter
Preload Value
(16 bit)
Strobe Register
Counts Per
Time Base
(16*bit)
Accumulator
(16 bit)
On/Off Presets
OUTPUT
COUNT A
PRELOAD/
STROBE
INPUT
PRELOAD
STROBE
COUNT B
Home Value
(16 bit)
ENABLE HOME
MARKER
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