Mitsubishi Electric GT14, User Manual

Page: 1522 / 1546

63 - 6
63. MODBUS(R)/RTU CONNECTION
63.4 GOT Side Settings
63.4 GOT Side Settings
63.4.1 Setting communication interface
(Communication settings)
Set the channel of the equipment connected to the GOT.
1.
Select [Common] [Controller Setting] from the
menu.
2.
The Controller Setting window is displayed. Select the
channel to be used from the list menu.
3.
Set the following items.
• Manufacturer: MODBUS
• Controller Type: MODBUS
• I/F: Interface to be used
• Driver: MODBUS/RTU
4.
The detailed setting is displayed after Manufacturer,
Controller Type, I/F, and Driver are set.
Make the settings according to the usage
environment.
63.4.2 Communication detail settings
Click the button when settings are completed.
POINT POINT POINT
The settings of connecting equipment can be set and
confirmed in [I/F Communication Setting]. For details,
refer to the following.
18.1.2 I/F communication setting
63.4.2 Communication detail settings
Make the settings according to the usage environment.
*1 The GOT ensures in advance the minimum interval (3.5
characters time) for communication frame defined in the
MODBUS/RTU.
Therefore, the actual send delay time is as follows.
When connecting to MODBUS equipment which requires a
delay longer than 3.5 character time, adjust the send delay
time.
HINT HINT HINT
If the communication with MODBUS equipment is not
established, some equipment which requires a delay
longer than 3.5 character time may be connected.
Adjust the send delay time in the communication detail
setting.
POINT POINT POINT
(1) Communication interface setting by Utility
The communication interface setting can be
changed on the Utility's [Communication setting]
after writing [Communication Settings] of project
data.
For details on the Utility, refer to the following
manual.
11. COMMUNICATION INTERFACE SETTING
(COMMUNICATION SETTING)
(2) Precedence in communication settings
When settings are made by GT Designer3 or the
Utility, the latest setting is effective.
2.
3.
4.
Click!
OK
Item Description Range
Transmission
Speed
Set this item when change the
transmission speed used for
communication with the connected
equipment. (Default: 19200bps)
9600bps,
19200bps,
38400bps,
57600bps,
115200bps
Data Bit
Set this item when change the data length used
for communication with the connected
equipment. (Default: 8bit)
7bit/8bit
Stop Bit
Specify the stop bit length for
communications. (Default: 1bit)
1bit/2bits
Parity
Specify whether or not to perform a parity
check, and how it is performed during
communication. (Default: Even) None
Even
Odd
Retry
Set the number of retries to be performed
when a communication error occurs.
(Default: 3times)
0 to 5times
Timeout Time
Set the time period for a communication to
time out. (Default: 3sec)
3 to 30sec
Host Address
Specify the host address in the connected
network. (Default: 1)
1 to 247
Delay Time
*1
Set this item to adjust the transmission
timing of the communication request from
the GOT. (Default: 0ms)
0 to 300ms
32bit Storage
Select the steps to store two words (32-bit
data). (Default: LH Order) LH Order/
HL Order
= +
Actual send
delay time
Send delay time set in
the communication
detail setting
3.5 character
time
Minimum interval for
communication frame
defined in MODBUS/RTU