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7. GENERAL DESCRIPTtON OF THE MASTER
U,MT(R.EFERENCE
(2)
I/O
Signals in Expansion
Mode
The following lists the I/O signals
when the master unit is installed
to
the head
1 / 0
numbers
of X O O N O O of
the A series PC.
Signal
names
x02
X03
YO2
YO3
3
I
X04
I
X05
I
YO4
I
YO5
4
I
X06
1
X07
I
YO6
I
YO7
6
I
XOA
I
XOB
I
YOA
I
YOB
7
I
XOC
I
XOD
I
YOC
I
YOD
I
8
1
XOE
I
XOF
I
YOE
I
YOF
1
12
I
X16
I
X17
I
Y16
I
Y17
13
I
X18
I
X19
I
Y18
I
YlQ
14
I
X1A
I
X1B
1
Y1A
I
Y1B
1
Signal name
X1
C
Hardware fault
X20
Unusable
X1F
'Unusable
X1
E
Unusable X1
D
Unurable
x21
During link
X22
Unusable
x23
Received data clear
completion
x24
Remote
terminal
error detection
X25
Test
mode
X26
Link
error
detection
Li
nb
X27
communications
error
X28
EPROM
fault
X29
Unusable
X2A
Unusable
X2B
Unusable
X2C
Unusable
X2D
Unusable
X2E
Unusable
X2F
Unusable
communications
11
Signal name
Unusable
Unusable
recelved data
qE2+
Y27
Unusable
Link
start
Y28
I
communications
Y29
I
Unusable
FROMITO
Y2D
I
Error reset
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