Omron Programmable Terminals NT31 NT31C User Manual
Page 96
85
SECTION 5
Connecting to the Host from the RS-422A/485 Port
This section describes the method for connecting to the host using the RS-422A/485 port of the PT.
5-1
Connecting to the Host’s RS-232C Port
86
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1-1
The Type of Host and Settings
87
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1-2
1:1 Connection between RS-422A/485 at the PT and RS-232C at the Host
88
. . . . .
5-1-3
1:N Connection between RS-422A/485 at the PT and RS-232C at the Host
92
. . . .
5-1-4
Recommended Connectors, Cables, and Crimp Terminals
97
. . . . . . . . . . . . . . . . . .
5-1-5
Setting the Terminal Resistance for RS-422A/485 Communications
99
. . . . . . . . . .
5-2
Connecting to the Host’s RS-422A/485 Port
100
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5-2-1
Host Types and Settings
101
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2-2
Direct Connection between RS-422A Ports at Both Units
117
. . . . . . . . . . . . . . . . . .
5-2-3
Direct Connection between RS-485 Ports at Both Units
121
. . . . . . . . . . . . . . . . . . . .
5-2-4
1:N Connection among RS-422A Ports
122
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2-5
1:N Connection among RS-485 Ports
125
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2-6
Recommended Connectors, Cables and Crimp Terminals
127
. . . . . . . . . . . . . . . . . .
5-2-7
Setting the Terminal Resistance for RS-422A/485 Communications
128
. . . . . . . . . .