Console Internal Functions
In addition to the operator interface and cabling inter-
face functions described previously, the console circuit
board provides a number of internal functions to com-
plete the testing system. These functions include a Cen-
tral Processing Unit (CPU), a Crosshead Control
function, a Load Sensor Conditioner, a Strain Sensor
Conditioner, and an IEEE-488 Interface function. These
functions are described in the following sections.
Central Processing Unit (CPU)
The CPU is a computer chip that provides the main proc-
essing functions for the console. A digital bus originat-
ing in this section allows communication with and
control of all other operations, including optional inter-
facing for peripheral devices. Battery backup in this sec-
tion allows nonvolatile parameter storage.
Crosshead Control Function
This function provides the interfacing between the load
frame and console for the crosshead control signals. The
encoder output signal provides crosshead position (ex-
tension) information that is conditioned and the
crosshead position (extension) determined by the func-
tions in this section. An error signal is developed when
the extension is compared with the commanded
crosshead speed and fed back to the crosshead drive sys-
tem.
Load Sensor Conditioner
Console Internal Functions M10-94400-1
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