C500LK009V1 Omron, C500LK009V1 Datasheet - Page 159

• Manufacturer Part Number: C500LK009V1
• Description: PC LINK UNIT
• Manufacturer: Omron

Specifications of C500LK009V1

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

I/O capacity
I/O Control Unit
I/O devices
I/O Interface Unit
I/O point
I/O Unit
I/O allocation
I/O bit
I/O delay
I/O refreshing
I/O response time
I/O word
IBM PC/AT or compatible
increment
initialize
input
input bit
The process by which the PC assigns certain bits in memory for various func-
tions. This includes pairing I/O bits to I/O points on Units.
A bit in memory used to hold I/O status. Input bits reflect the status of input termi-
nals; output bits hold the status for output terminals.
The number of inputs and outputs that a PC is able to handle. This number
ranges from around one-hundred for smaller PCs to two-thousand for the
largest ones.
A Unit mounted to the CPU Rack in certain PCs to monitor and control I/O
points on Expansion I/O Units.
The delay in time from when a signal is sent to an output to when the status of the
output is actually in effect or the delay in time from when the status of an input
changes until the signal indicating the change in the status is received.
The devices to which terminals on I/O Units, Special I/O Units, or Intelligent
I/O Units are connected. I/O devices may be either part of the Control Sys-
tem, if they function to help control other devices, or they may be part of the
controlled system.
A Unit mounted to an Expansion I/O Rack in certain PCs to interface the
Expansion I/O Rack to the CPU Rack.
The place at which an input signal enters the PC System or an output signal
leaves the PC System. In physical terms, an I/O point corresponds to termi-
nals or connector pins on a Unit; in terms of programming, an I/O point corre-
sponds to an I/O bit in the IR area.
The process of updating output status sent to external devices so that it agrees
with the status of output bits held in memory and of updating input bits in memory
so that they agree with the status of inputs from external devices.
The time required for an output signal to be sent from the PC in response to an
input signal received from an external device.
The most basic type of Unit mounted to a backplane to create a Rack. I/O
Units include Input Units and Output Units, each of which is available in a
range of specifications. I/O Units do not include Special I/O Units, Link Units,
etc.
A word in the CIO area that is allocated to a Unit in the PC System and is used to
hold I/O status for that Unit.
A computer that has similar architecture to, that is logically compatible with, and
that can run software designed for an IBM PC/AT computer.
Increasing a numeric value, usually by 1.
Part of the startup process whereby some memory areas are cleared, system
setup is checked, and default values are set.
The signal coming from an external device into the PC. The term input is often
used abstractly or collectively to refer to incoming signals.
A bit in the CIO area that is allocated to hold the status of an input.
Glossary
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