Mitsubishi Electric 800 Series Instruction Manual page 59

Communication
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 Ethernet IP filtering function (Pr.1442 to Pr.1448)
• Set the IP address range for connectable network devices (Pr.1442 to Pr.1448) to limit the connectable devices. The
setting range for IP address of connectable network devices depends on the settings in Pr.1443 and Pr.1446, Pr.1444 and
Pr.1447, and Pr.1445 and Pr.1448. (Either of the settings can be larger than the other in Pr.1443 and Pr.1446, Pr.1444
and Pr.1447, and Pr.1445 and Pr.1448.)
[Setting example 1]
Ethernet IP address for filtering
Filtering range setting
for the Ethernet IP address
In this case, the IP address range in which Ethernet communication is permitted is "192.168.x (1 to 3).xxx (100 to 150)".
[Setting example 2]
Ethernet IP address for filtering
Filtering range setting
for the Ethernet IP address
In this case, the IP address range in which Ethernet communication is permitted is "192.168.2.xxx (50 to 100)".
• When Pr.1442 to Pr.1445 = "0 (initial value)", the function is invalid.
• When "9999 (initial value)" is set in Pr.1446 to Pr.1448, the range is invalid.
CAUTION
• The Ethernet IP filtering function (Pr.1442 to Pr.1448) is provided as a means to prevent unauthorized access (with
intentions such as to corrupt programs or data) by external systems, but the function does not prevent it completely. In
order to protect the inverter and the system against unauthorized access by external systems, take additional security
measures. Mitsubishi Electric Corporation will not take any responsibility for any problems in the inverter and the system
incurred by unauthorized access. The following are examples of measures to prevent unauthorized access.
- Install a firewall.
- Install a personal computer as a relay station, and control the relaying of transmission data using an application
program.
- Install an external device as a relay station to control access rights. (For the details of external devices used to control
access rights, contact the distributors of the external devices.)
 Message format
Request
Within 10 ms∗1
*1
The chart shows the performance when the inverter is connected to a master on a 1:1 basis. (It takes 10 ms or more for Parameter clear, All
parameter clear, or accessing multiple registers.)
• Query
A message is sent to the slave (the inverter) having the address specified by the master.
• Normal response
After the query from the master is received, the slave executes the request function, and returns the corresponding normal
response to the master.
• Error Response
When an invalid function code, address or data is received by the slave, the error response is returned to the master.
This response is appended with an error code that indicates the reason why the request from the master could not be
executed.
58
2. Ethernet Communication
2.7 MODBUS/TCP
Pr.1442
Pr.1443
192
168
The range is between
the values set in both
parameters.
Pr.1446
9999
Pr.1442
Pr.1443
192
168
The range is between
the values set in both
parameters.
Pr.1446
9999
Response
Pr.1444
Pr.1445
1
100
The range is between
the values set in both
parameters.
Pr.1447
Pr.1448
3
150
Pr.1444
Pr.1445
2
100
Pr.1447
Pr.1448
9999
50

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