CONTENTS
1. GENERAL DESCRIPTION
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10
1.1
Features
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1-4
1.1.1
Control operations
in
data communications
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1.1.2
System configuration
and
the number
of
stations
when
a computer
link system
is
constructed
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1.1.3
Link with a
computer
through data link
systems
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1.1.4
Modeswitchingfunction
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1.1.5
Transmission control
function
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1
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10
2
SYSTEM
CONFIGURATIONS
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1
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2
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21
21
Overall Configurations
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2-
1
2.3
System Configurations
and
Available Functions
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2
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4
23.1
1
:
1
ratio
of
an
external
device
(computer) to a PC CPU
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23.2
1
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ratio
of
an
external device to PC CPUs
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2- 7
23.3 2:
1
ratioofextemaldevicestoaPCCPU
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2-10
2.3.4
2:nratioofextemaldevitoPCCPUs
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2-13
2.3.5
m:nratioofextemaldevicestoPCCPUs
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2-16
23.6
Links
with
an
external
device (such
as
a
computer)
through data link systems
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19
2.2
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ApplicableSyst~~~~
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2-2
3.1
GeneralSpeCificati
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3-1
3.2
Perf~nnan~eSpeCificatiOns
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3-2
3.2.1
Transmbsionspecifications..
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3-2
3.2.3
RS422
terminal Mock
specifiions
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3
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5
3.3
Data Communications Functions
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6
3.3.1
Functions available
using
dedicated
protocots
and
commands
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3
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6
3.3.2
Functions
available
in
the
no-protocol
mode
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3
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13
3.3.3
Functions
available
in
the bidirectional
mode
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3
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14
3.3.4
Transmission error data read function
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3
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15
3.4
Mode
Switching Function During
A171 C24
Operations
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3
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16
3.4.1
Precautions when
mode
switching
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3
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16
3.4.2
Procedure for switching the
mode
from
an
external
device
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3
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20
3.4.3
Procedure for
switching
the
mode
from
a
PC
CPU
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3
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22
3.5
Data Communications
Transmission
Control Function
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3
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24
3.5.1
Precautions
when
controlling
transmission
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3
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24
3.5.2
DTR
/DSR
(EWDR)
control.
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3
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28
3.5.3
DCl/DC3 transmission
control .
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3
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30
3.5.4
DCl/DC3
receive control
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3
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31
3.5.5
DC2DC4sendcontrol
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3-32
3.2.2
RS-232CCOnnectOrspecificati
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3-3
3.2.4
RS422caMe~pecifications..
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3-5
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