Introduction 1
1 - 6
Squarewave
Can generate squarewaves with programmable ON and OFF
periods. On and OFF periods have a base range from 0.01 to
2.55 seconds. Resolution can be further multiplied by a
factor of 1-256 on a system wide basis. Re-Triggering is
available.
Pulse Generator
Can generate 1to 65,535, 50% duty cycle pulses whose
equal ON and OFF periods can range from 0.01 to 2.55 Sec.
Resolution can be further multiplied by a factor of 1-256 on
a system wide basis.
Extended capabilities:
In addition to operating under control of a Host, option /L of the I/O PLEXER
has the ability to perform local control functions without the Host. Local control
functions (LCF’s) can insure the continued safe operation of closed loop control
should the Host or its communication link fail. In addition, the LCF’s can
substantially reduce Host computational load or communications traffic.
Once characterized, local control function blocks enable the I/O PLEXER to
perform control tasks without the constant involvement of a Host computer. After
configuration and activation via Host instructions, LCF’s take data from their
input port and perform computations and send the results to their outputs where
they may drive output modules, or other I/O PLEXER internal functions.
Utilizing the LCF’s to perform simple logic tasks such as analog comparisons,
the summations, differences, sequence generating or multiple state machine
operations eliminates the need for programmable controllers or special purpose
circuitry. This capability allows a more effective use of the Host computer and its
communication link because the LCF’s handle the operation of the designated
control function. In the meantime the Host is only required to monitor over-all
system status and generate the system displays and reports. This is particularly
valuable for systems using modems of communications.
Communications watchdogs
The I/O PLEXER can be instructed to implement alarm and fail-safe states in the
event of a communication failure.
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