Mitsubishi Electric GT16, User Manual

Page: 1279 / 1306

63. MODBUS(R)/RTU CONNECTION
63.5 MODBUS/RTU Equipment Side Setting
63 - 7
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
(b) When configuring individual communication
settings for specific channel numbers
The table below shows the settings for the GS
device.
63.5.2 Station number setting
In the MODBUS network, a maximum of 31 MODBUS
equipment can be connected to one GOT.
Assign a non-overlapped station number ranging from 1 to
247 arbitrarily to each MODBUS equipment.
In the system configuration, the MODBUS equipment with the
station number set with the host address must be included.
The station number can be set without regard to the cable
connection order. There is no problem even if station
numbers are not consecutive.
(1) Direct specification
When setting the device, specify the station number of
the MODBUS
®
/RTU equipment of which data is to be
changed.
(2) Indirect specification
When setting the device, indirectly specify the station
number of the MODBUS
®
/RTU equipment of which
data is to be changed using the 16-bit GOT internal
data register (GD10 to GD16).
When specifying the station No. from 248 to 254 on GT
Designer3, the value of GD10 to GD16 compatible to
the station No. specification will be the station No. of
the MODBUS
®
/RTU equipment.
(3) All station specification (broadcast)
Target station differs depending on write-in operation or
read-out operation.
• For write-in operation, all station will be a target.
• For read-out operation, only the host station will be a
target.
GS573
Function Code "03"
Specification for the
max. number of holding
register read times
0:125
1 to 125: Specify the maximum number.
Other than above: 125
GS574
Function Code "04"
Specification for the
max. number of input
register read times
0:125
1 to 125: Specify the maximum number.
Other than above: 125
GS575
Function Code "0F"
Specification for the
max. number of
multiple-coil write times
0:800
1 to 1968: Specify the maximum number.
Other than above: 1968
When Bit0 of GS570 is "1", the function
code "0F" is not used, and therefore the
setting of GS575 will be disabled.
GS576
Function Code "10"
Specification for the
max. number of
multiple-holding
register write times
0:100
1 to 123: Specify the maximum number.
Other than above: 123
When Bit1 of GS570 is "1", the function
code "10" is not used, and therefore the
setting of GS576 will be disabled.
GS device
Description Set value
Ch1 Ch2 Ch3 Ch4
GS
590
GS
597
GS
604
GS
611
Command selection
Bit0: 0 Using Function Code
"0F"
1 Not using Function
Code "0F"
Bit1: 0 Using Function Code
"10"
1 Not using Function
Code "10"
GS
591
GS
598
GS
605
GS
612
Function Code "01"
Specification for the
max. number of coil
read times 0:2000
1 to 2000: Specify the maximum
number.
Other than above: 2000
GS
592
GS
599
GS
606
GS
613
Function Code "02"
Specification for the
max. number of input
relay read times 0:2000
1 to 2000: Specify the maximum
number.
Other than above: 2000
GS
593
GS
600
GS
607
GS
614
Function Code "03"
Specification for the
max. number of
holding register read
times
0:125
1 to 125: Specify the maximum
number.
Other than above: 125
GS
594
GS
601
GS
608
GS
615
Function Code "04"
Specification for the
max. number of input
register read times 0:125
1 to 125: Specify the maximum
number.
Other than above: 125
GS
595
GS
602
GS
609
GS
616
Function Code "0F"
Specification for the
max. number of
multiple-coil write
times
0:800
1 to 1968: Specify the maximum
number.
Other than above: 1968
When Bit0 of GS570 is "1", the
function code "0F" is not used,
and therefore the setting of
GS575 will be disabled.
GS
device
Description Set value
GS
596
GS
603
GS
610
GS
617
Function Code "10"
Specification for
the max. number of
multiple-holding
register write times
0:100
1 to 123: Specify the maximum
number.
Other than above: 123
When Bit1 of GS570 is "1", the
function code "10" is not used,
and therefore the setting of
GS576 will be disabled.
Specification range
1 to 247
Specification
station NO.
Compatible
device
Set value
248 GD10
0 to 255:
0: All station specification (broadcast)
255 : Host station access
For the setting other than the above, an
error (dedicated device is out of range) will
occur 249 GD11
250 GD12
251 GD13
252 GD14
253 GD15
254 GD16
GS device
Description Set value
Ch1 Ch2 Ch3 Ch4
GOT
Examples of station number setting
Station
No.3
Station
No.15
Station
No.1