Multi-Tech Systems 7500 - Manual (Page 221)

ION 7500 / ION 7600 User’s Guide Detailed Module Operation
Digital and Analog I/O Technical Note Page 221
Detailed Module Operation
The Calibration Pulser module integrates the Source input, determines how many
KYZ transitions or complete pulses it must generate from the Kt setup register, and
sends the output to the hardware channel specified in the Port setup register.
Depending on the number of KYZ transitions or complete pulses output, the
Calibration Pulser module operates in a normal, maximum, or an overload state.
Normal State
A value entered into the Pulse Width register describes the on-time of the pulse (i.e.
the time period that an LED is lit or relay is closed). In normal operation, the on-
time of the pulse is significantly shorter than the off-time.
KYZ mode indicates a transition (from high to low or vice versa), so Pulse Width
typically has no effect, except in an overload state. The on-time and off-time of a
KYZ transition is equal in normal and maximum states.
The diagram above shows four complete pulses for the Calibration Pulser module
in P
ULSE mode, and four transitions for the Calibration Pulser module in KYZ
mode. If the Kt register was set up to send a pulse or KYZ transition for 1.8 energy-
hours on each module respectively, then both modules have equal energy-hours
output.
Pulse mode
KYZ mode
High-Low
transitions
Pulse Width
(e.g. duration of a lit LED)
Time
High
Lo
w
High
Lo
w