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64.5 Device Range that Can Be Set
For details on the device range of controllers that can be
used on GT16 Handy, refer to the following manuals.
GT Designer3 Version1 Screen Design Manual
(Fundamentals)
GOT1000Series Connection Manual
(Microcomputer, MODBUS Products,
Peripherals)
for GT Works3
MODBUS communication control function on
the GS device
(1) Functions overview
This function is to prevent the communication response
delay that occurs because the devices on the
MODBUS network differs from each other in network
specification.
This function is effective for the MODBUS network
conditions as described below:
• When only a part of function codes is supported
(Example: "0F" is not supported)
• When the maximum transfer size of function code is
small (Example: The maximum number of coil read
times is 1000)
(2) Communication setting
When the MODBUS/RTU communication driver is
assigned to multiple channel numbers using the multi-
channel function, the following cases are possible. The
communication settings are shared between the
assigned multiple channel numbers, or the individual
communication setting is configured to a specific
channel number.
By setting the device GS579, either the GS device used
for sharing communication settings (GS570 to GS576)
or the GS device used for individual communication
setting (GS590 to GS617) is validated.
GS
Description
device
Bit0:
0
1
Bit1:
0
Validity of
1
setting
GS579
channel
Bit2:
0
number
1
Bit3:
0
1
64 - 4
64. MODBUS(R)/TCP CONNECTION
64.5 Device Range that Can Be Set
Set value
Configure the Ch1 communication settings
between GS570 to GS576.
Configure the Ch1 communication settings
between GS590 to GS596.
Configure the Ch2 communication settings
between GS570 to GS576.
Configure the Ch2 communication settings
between GS590 to GS603.
Configure the Ch3 communication settings
between GS570 to GS576.
Configure the Ch3 communication settings
between GS604 to GS610
Configure the Ch4 communication settings
between GS570 to GS576.
Configure the Ch3 communication settings
between GS611 to GS617.
(a) When sharing communication settings between
multiple channel numbers
The table below shows the settings for the GS
device.
GS
Description
device
GS570 Command selection
Function Code "01"
Specification for the
GS571
max. number of coil
read times
Function Code "02"
Specification for the
GS572
max. number of input
relay read times
Function Code "03"
Specification for the
GS573
max. number of holding
register read times
Function Code "04"
Specification for the
GS574
max. number of input
register read times
Function Code "0F"
Specification for the
GS575
max. number of
multiple-coil write times
Function Code "10"
Specification for the
GS576
max. number of
multiple-holding
register write times
(b) When configuring individual communication
settings for specific channel numbers
The table below shows the settings for the GS
device.
GS device
Description
Ch1 Ch2 Ch3 Ch4
GS
GS
GS
GS
Command selection
590
597
604
611
Function Code "01"
GS
GS
GS
GS
Specification for the
591
598
605
612
max. number of coil
read times
Function Code "02"
GS
GS
GS
GS
Specification for the
592
599
606
613
max. number of input
relay read times
Set value
Bit0:
0
Using Function Code "0F"
1
Not using Function Code "0F"
Bit1:
0
Using Function Code "10"
1
Not using Function Code "10"
0:1000
1 to 2000: Specify the maximum number.
Other than above: 2000
0:2000
1 to 2000: Specify the maximum number.
Other than above: 2000
0:125
1 to 125: Specify the maximum number.
Other than above: 125
0:125
1 to 125: Specify the maximum number.
Other than above: 125
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.
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.
Set value
Bit0:
0
Using Function Code
"0F"
1
Not using Function
Code "0F"
Bit1:
0
Using Function Code
"10"
1
Not using Function
Code "10"
0:2000
1 to 2000: Specify the maximum
number.
Other than above: 2000
0:2000
1 to 2000: Specify the maximum
number.
Other than above: 2000
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