Moxa Technologies NPort 5200 Serie User Manual Page 111

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CN2610 User’s Manual Setting Up DRDAS
7-4
CN2610-8 CN2610-8_19 V2.0
------------------------------------------------------------------------------
[Mode] Line mOdem Welcome_MSG Quit
Examine/modify the operation mode of async ports
ESC: back to menu Enter: select
Port Application Mode Description/more setting
01 [DRDAS ] [DRDAS ] [Dual-PC redundant data mode ]
02 [DRDAS ] [DRDAS ] [Dual-PC redundant data mode ]
03 [DRDAS ] [DRDAS ] [Dual-PC redundant data mode ]
04 [DRDAS ] [DRDAS ] [Dual-PC redundant data mode ]
05 [DRDAS ] [DRDAS ] [Dual-PC redundant data mode ]
06 [DRDAS ] [DRDAS ] [Dual-PC redundant data mode ]
07 [DRDAS ] [DRDAS ] [Dual-PC redundant data mode ]
08 [DRDAS ] [DRDAS ] [Dual-PC redundant data mode ]
DRDAS Mode
DRDAS mode supports a dual-host redundant application structure on the redundant network.
1. Move the cursor to the Description/more setting column, and then press Enter to open the
settings window. Each serial port has its own TCP data port number and TCP command port
number.
+-----------------------------------------------------+
| TCP data port : [955] |
| TCP command port : [971] |
| Primary IP addr : [ ] |
| Backup 1 IP addr : [ ] |
| Backup 2 IP addr : [ ] |
| Backup 3 IP addr : [ ] |
| TCP alive check time : [0 ] minutes |
+-----------------------------------------------------+
2. Every CN2610 port has the ability to connect to 4 different IP addresses at the same time.
Primary IP addr has to be configured as the IP address of the primary host controlling the
serial port, and Backup n IP addr has to be configured as the IP address of the redundant host.
When the primary host disconnects for an unknown reason, CN2610 will use the switching
library to let backup IPs take over. In this way, CN2610’s control ability and the data flow
will be transferred to the backup host, realizing a highly redundant system. In the mean time,
the primary host’s dual Ethernet ports and those of the backup host will receive the same
uploaded serial data. In the specified period of time, if one of the secondary IPs tries to send
commands to the serial device, the commands will be discarded once they reach the CN2610,
since the Primary IP is the only IP address that can conduct by-directional transmission. The
backup IPs can only receive data from the CN2610, but cannot send commands to the serial
device.
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