![background image](http://html1.mh-extra.com/html/omron/sysmac-c200hw-pcs01-ev1/sysmac-c200hw-pcs01-ev1_operation-manual_742247247.webp)
Glossary
231
I/O allocation
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.
I/O delay
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.
I/O refreshing
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.
I/O response time
The time required for an output signal to be sent from the PC in response to an
input signal received from an external device.
I/O verification error
A error generated by a disagreement between the Units registered in the I/O
table and the Units actually mounted to the PC.
I/O word
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.
IBM PC/AT or compatible
A computer that has similar architecture to, that is logically compatible with, and
that can run software designed for an IBM PC/AT computer.
ICMP
Internet Control Message Protocol: Supports IP communications by signalling
errors in data transfers.
initialize
Part of the startup process whereby some memory areas are cleared, system
setup is checked, and default values are set.
input
The signal coming from an external device into the PC. The term input is often
used abstractly or collectively to refer to incoming signals.
input bit
A bit in the CIO area that is allocated to hold the status of an input.
input device
An external device that sends signals into the PC System.
instruction
A direction given in the program that tells the PC of the action to be carried out,
and the data to be used in carrying out the action. Instructions can be used to
simply turn a bit ON or OFF, or they can perform much more complex actions,
such as converting and/or transferring large blocks of data.
interface
An interface is the conceptual boundary between systems or devices and usu-
ally involves changes in the way the communicated data is represented. Inter-
face devices such as NSBs perform operations like changing the coding, format,
or speed of the data.
internode test
A test executed via data area settings between two nodes on communications
networks and used to determine if communications are normal.
interrupt (signal)
A signal that stops normal program execution and causes a subroutine to be run
or other processing to take place.
IOM (Area)
A collective memory area containing all of the memory areas that can be
accessed by bit, including timer and counter Completion Flags. The IOM Area
includes all memory area memory addresses between 0000 and 0FFF.
IP
Internet Protocol: Transfers datagrams to target nodes using IP addresses.
Summary of Contents for SYSMAC C200HW-PCS01-EV1
Page 1: ...Cat No W313 E1 3 PC Card Unit SYSMAC C200HW PCU01 C200HW PCS01 EV1 OPERATION MANUAL...
Page 2: ......
Page 3: ...SYSMAC C200HW PCU01 C200HW PCS01 EV1 PC Card Unit Operation Manual Revised January 2000...
Page 4: ......
Page 6: ......
Page 10: ......
Page 12: ......
Page 18: ......
Page 34: ......
Page 38: ......
Page 60: ......
Page 80: ......
Page 82: ......
Page 88: ......
Page 120: ......
Page 148: ......
Page 178: ......
Page 214: ......
Page 220: ......
Page 232: ......
Page 234: ......
Page 236: ......
Page 238: ......
Page 240: ......