Mitsubishi Electric Q66DA-G, User Manual

Page: 43 / 190

3
SPECIFICATIONS
3.3 I/O Signals for the Programmable Controller CPU
3.3.2 Details of I/O signals
3
- 20
1
OV
E
R
VI
EW
2
SYSTE
M
CO
N
F
IG
UR
A
T
IO
N
3
S
P
E
CI
F
ICA
T
IO
N
S
4
SE
T
U
P
AN
D
PR
OCE
D
U
R
ES
B
E
FOR
E
OP
ER
A
T
ION
5
UT
ILI
T
Y
P
ACK
AGE
(G
X CO
NFI
G
U
R
A
T
O
R
-
DA
)
6
PROGRAMMING
7
ON
LI
N
E M
O
D
U
LE
CHANGE
8
T
R
OU
B
LES
H
O
O
T
IN
G
3.3.2 Details of I/O signals
I/O signals for the Q66DA-G are explained in detail below.
(1) Input signals
Device No. Signal name Description
X0 Module READY
(1) When the programmable controller CPU is powered on or reset, this signal turns ON when the
initial processings in the Q66DA-G are all completed.
(2) When Module READY (X0) signal is off, D/A conversion processing is not performed. Module
READY (X0) turns off in the following situations:
During offset/gain setting mode
When the Q66DA-G has a watchdog timer error
X7
External power sup-
ply READY
(1) This signal turns on 100ms after turning on the external power supply.
(2) In normal mode, when Module READY (X0) is off, this signal does not turn on even if 100ms
have elapsed after turning on the external power supply.
In this case, as soon as Module READY (X0) turns on, this signal (X7) turns on.
(3) In Offset/gain setting mode, when Offset/gain setting mode flag (XA) is off, this signal does not
turn on even if 100ms have elapsed after turning on the external power supply.
In this case, as soon as Offset/gain setting mode flag (XA) turns on, External power supply
READY (X7) turns on.
(4) D/A conversion is performed after External power supply READY (X7) turns on.
(5) When the external power is not supplied or has been supplied for less than 100ms, X7 is off
and no D/A conversion is performed.
At this time, the analog output value is “0mA/0V” regardless of other settings, and no invalid
digital value error detection or no warning output is performed.
(6) X7 might not turn on when the external power supply does not meet the requirements shown in
the performance specifications (Refer to Table3.1.).
(7) The following time chart shows that the external power supply is turned on after power-on of a
programmable controller CPU.
(8) When performing D/A output, X0 and X7 must be on as shown below.
X8
High resolution
mode status flag
(1) This turns on at the high resolution mode.
In normal mode :(X0)
In offset/gain
setting mode :(XA)
External power supply
D/A conversion
is not performed
Power supply of a
programmable
controller CPU
External power supply
READY(X7)
ON
ON
ON
OFF
OFF
100ms
ON
D/A conversion
is performed
Digital value
write command
U0\
G1
K4000 MOVP
X0 X7