A SERVICE OF

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1. LIST OF ALARMS
1.5 System Alarms
I - 29
Note 2: RIO communication interrupt
If communication between the control unit and remote I/O unit fails, the alarm and remote I/O unit
number are displayed.
Z55 RIO NOT CONNECT

0 0

(a) and (b) above indicate the following matters.
Alarm
number
RIO
(seventh
station)
RIO
(sixth
station)
RIO
(fifth
station)
RIO
(fourth
station)
Alarm
number
RIO
(third
station)
RIO
(second
station)
RIO
(first
station)
RIO
(0th
station)
0 0
1
×
1
×
2
×
2
×
3
×
×
3
×
×
4
×
4
×
5
×
×
5
×
×
6
×
×
6
×
×
7
×
×
×
7
×
×
×
8
×
8
×
9
×
×
9
×
×
A
×
×
A
×
×
B
×
×
×
B
×
×
×
C
×
×
C
×
×
D
×
×
×
D
×
×
×
E
×
×
×
E
×
×
×
F
×
×
×
×
F
×
×
×
×
(a)(b)
Board connection remote I/O
communication interrupted station
Remote I/O 1st system communication
interrupted station
Remote I/O 2nd system communication
interrupted station
This applies for both the remote I/O 1st system communication interrupted station and board connection
remote I/O communication interrupted station.