GE VersaMax IC200PWR001 User Manual page 454

13
IC200MDD841
Mixed Module, 24 V DC 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 2 kHz, and the duty cycle for both must be such that the signal is
high for at least 250 microseconds.
ENABLE HOME
MARKER
COUNT A
COUNT B
PRELOAD/
STROBE
INPUT
13-14 VersaMax Modules, Power Supplies and Carriers User's Manual
Home Value
(16 bit)
Up/Down Counter
PRELOAD
Preload Value
(16 bit)
Accumulator
(16 bit)
Counts Per
Time Base
(16*bit)
Strobe Register
STROBE
On/Off Presets
OUTPUT
GFK-1504N