Toshiba GR200 Series Instruction Manual page 641

Modbus TCP
10.5.5
The Modbus TCP can support the communication over the Ethernet. The Ethernet provides
the Modbus TCP (see Figure 10.5-1). TCP and IP layers detect errors over the Ethernet, so the
error check one is omitted here. The Modbus TCP will be set when the setting
[MODBUS_SELECT] = TCP.
Communication
10:48 1/7
LAN >
USBCOM >
RS485 >
SLAVE PROTOCOL >
IEC61850 >
IEC103 >
MODBUS >
Note: Each IED (Slave) can be identified by an IP address. Thus, the user does not have
to set the setting [MODBUS ADDR] (see sec. 10.5.4(ii)-1) when the TCP is set.
Network structure
(i)
Figure 10.5-9 shows the IEDs(Slave) connect with substation computer(s)(Master) through
Ethernet ring LAN. IEDs can communicate with up to 6 substation computers, and serval
architectures and speeds can be defined by the LAN communication modules†.
Remote monitoring
Message frame
TCP slave response
IED (Slaves)
Device1
(192.168.1.11)
Figure 10.5-9 Ethernet ring LAN by Modbus TCP/IP
†Note: See Chapter
The use can set an IP address with setting [IPADDRESS1] (see Figure 10.2-1).
MODBUS
10:48
MODBUS_BLK
Off
MODBUS ADDR
MODBUS_SELECT
Serial (TCP)
Figure 10.5-8 Switch to the Modbus TCP
Communication
Network
Router/
Modem
Ethernet LAN
Device2 Device3
(192.168.1.12) (192.168.1.13)
Technical description: Signal processing and communication module.
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+
Press
+
2
Press
+
set [MOSBUS_SELECT]=TCP
Substation Computer(s) (Master)
TCP master query
Device X
(192.168.1.XX)
6F2S1931 (0.20)
ENTER key
, , , 
to
Message frame
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)