Mitsubishi Electric MELSEC-A User Manual page 110

14. AJ71 UC24 MASTER STATION
MELSEC-A
14.2 110
Signals List for PC CPU
I 1 0 device numbers depend on the AJ71 UC24 1 1 0 unit number.
The device numbers indicated in the table below assume that the 1 1 0 unit
number has been set to 0.
(1) Input signals (AJ71 UC24 to PC CPU)
16 points
f r o m
XnO to XnF are provided.
XnO
I
During data transmission sequence
Device Signal Name
I
Xn I
Xn2
Xn3
Xn4
to
XnC
XnD
Description
.
On during normal data transmission sequence.
Re-transmission sequence error
Data transmission sequence error
Valid when link rocessin setting
(
is STOP (Ew2.2 OF?).
I
Data transmission sequence error
Valid when link processin setting
(
CONTINUE ( s w ~ ~ % N ) .
-
WDT (Watch dog timer) error
Xn E
XnF
Off indicates pre-transmission sequence or an error.
On indicates an error during pre-transmission sequence.
Switched off when Y(n+l)l is turned on.
.
On indicates an error during data transmission sequence.
.
Switched off when Y(n+l)l is turned on.
~
-
-
On indicates an error during data transmission sequence.
Switched on by a return request when the faulty slave station
retunes to the link system.
Reserved
Switched on when the AJ7l UC24 watch dog timer times out.
Reserved
POINT~
YnO to YnF which are unused
by the AJ71 UC24 may be used
as internal
relays.
(2)
Output signals (PC CPU to AJ71 UC24)
16 points
from Y(n+l)O to Y(n+l)F are provided.
IMPORTANT
Y(n+1)2 to Y(n+l)F
are resewed
f o r
the use by the system and cannot
be used by sequence programs.
If any of these devices in used (ONIOFF) by a sequence program,
correct operation of the AJ71 UC24 are not guaranteed.
r
Device
Y(n+l)O
Y(n+l)l
Y(n+1)2
to
Y(n+l)F
Signal Name
Link start-up
Error reset
-
Description
Switch on to start up the AJ71 UC24. Keep this signal on during
operation.
.
Switch off to stop transmission.
.
Use this signal to turn off Xnl or Xn2.
Reserved