Mitsubishi Electric GT16, User Manual

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61. MICROCOMPUTER CONNECTION (SERIAL)
61.7 System Configuration Examples
61 - 69
60
CONNECTION T
O
MURA
T
E
C
CONTROLL
ER
61
MI
C
R
O
C
OMPUTER
CONNECTION (SE
R
IA
L)
62
MICR
OCOMPUTER
CONNECTION (E
T
HE
RN
E
T)
63
MO
D
B
US(R)/
R
T
U
CONNE
C
T
ION
64
MO
DBUS(R)/
TCP
CON
N
E
C
T
ION
65
V
NC(R) S
E
R
V
E
R
CONNECTION

Outline of system operation
The following describes the processing on the host
side, display/processing on the GOT side, and data
transfer packets.
(Assuming that host side programs use programs
which perform the processing on host side shown
below.)
*1 Displays the send packet structure of the screen 1 batch switching
write packet.
*2 Displays the send packet structure of the numerical value display
batch write packet.
*3 Displays the send packet structure of the numerical value display
batch read packet.
*4 Displays the receive packet structure of the batch write response
packet.
*5 Displays the receive packet structure of the batch read response
packet.
*6 Displays the receive packet structure of the interrupt receive packet.
Processing Processing on host side
Packet
used for
data
transfer
Display/
Processing on
GOT side
Initial
processing
Opens the port. ―― ――
Writes "1" to the screen
switching device (D20).
Screen 1
batch
switching
Write
packet
*1
Displays base
screen 1.
Receives a response from
the GOT.
― ―
Judges whether or not
there is an error in the
response from the GOT.
― ―
Writes an initial value to
device (D21).
Batch
numerical
value
display
write
packet
*2
Displays "0"
on the
numerical
value display
on base
screen 1.
Reception of
response/
interrupt from
GOT
When
receiving a
response to
writing to
device
(D21) from
the GOT Issues the
current
value
acquisition
request to
device
(D21).
Batch
numerical
value
display read
packet
*3
Increments the
numerical
value
displayed on
base screen 1.
(The host side
repeats the
processing on
the left as long
as base
screen 1 is
displayed.)))
When
receiving a
response to
reading of
device
(D21) from
the GOT
Creates the
next device
value (D21).
―
Calculates
the sum
check of the
send
packet.
―
Issues the
update
request of
device
(D21).
Batch
numerical
value
display
write
packet
*2
When
receiving an
interrupt
requesting
the base
screen
switching
from 1 to 2
Sets the
state of the
base screen
to base
screen 2.
Interrupt
receive
packet*6
*6
Touch touch
switch 1 to
switch to base
screen 2.
Notify the host
by an interrupt.
Reception of
response/
interrupt from
GOT
When
receiving an
interrupt
requesting
the base
screen
switching
from 2 to 1
Sets the
state of the
base screen
to base
screen 1.
Interrupt
receive
packet*6
*6
Touch touch
switch 3 to
switch to base
screen 1.
Notify the host
by an interrupt.
End
processing
(only when
receiving an
error
response)
Close the port. ― ―
Processing Processing on host side
Packet
used for
data
transfer
Display/
Processing on
GOT side
Sum check is performed in this range.
02
H
STX
03
H
ETX
(H) (L)
8 2
38
H
32
H
Sum
Check
(H) (L)
Command
W D
57
H
44
H
(H) (L)
Address
0 2
30
H
32
H
– –
0
30
H
0
30
H
(H) (L)
Number of
points
0 1
30
H
31
H
(H) (L)
Data 1 (D20)
0 0
30
H
30
H
– –
1
31
H
0
30
H
Sum check is performed in this range.
02
H
STX
03
H
ETX
(H) (L)
Sum check
(Changes
according to
data section.)
(H) (L)
Command
W D
57
H
44
H
(H) (L)
Address
0 2
30
H
32
H
– –
1
31
H
0
30
H
(H) (L)
Number of
points
0 1
30
H
31
H
(H) (L)
Data 1 (D21)
– –
(any value)
Sum check is performed in this range.
02
H
STX
03
H
ETX
(H) (L)
B D
42
H
44
H
Sum
Check
(H) (L)
Command
R D
52
H
44
H
(H) (L)
Address
0 1
30
H
31
H
– –
2
32
H
(H) (L)
Number of
points
0 1
30
H
31
H
0
30
H
15
H
NAK
When an error occurred
06
H
ACK
When normally operated
Sum check is performed in this range.
02
H
STX
03
H
ETX
(H) (L)
Sum check
(Changes
according to
data section.)
(H) (L) – –
Data
(any data)
When normally operated
15
H
NAK
When an error occurred
Output value
Interrupt data
(value of D13)