Peripheral Port; Built-In Rs-232C Port - Omron CQM1H - 08-2005 Operation Manual

CPU Units
C-series PC in 1:1 Data Link Mode
PT in 1:1 NT Link Mode
3-1-7

Peripheral Port

Note
Opening the Peripheral
Port Cover
3-1-8

Built-in RS-232C Port

1
5
Device and mode
The peripheral port is mainly used for connecting Programming Devices, such
as Programming Consoles and personal computers running Support Soft-
ware. Programming Consoles can be connected only to this port. Host Link
and no-protocol communications are also supported for this port.
1. When connecting a Programming Console to the peripheral port, turn OFF
pin 7 on the DIP switch on the front of the CPU Unit.
2. When connecting a device to the peripheral port other than a Programming
Console, such as a personal computer running Support Software, be sure
to turn ON pin 7 on the DIP switch on the front of the CPU Unit. When con-
necting to a peripheral bus, it is also necessary to set the communications
mode in the PC Setup to Host Link mode.
Insert your fingertip or a small screwdriver in the gap on the right of the cover
and pull to the left to open, as shown on the left in the following illustration.
The RS-232C port built into the CPU Unit is mainly used for connecting
devices other than Programming Devices. It is not possible to perform com-
munications with a Programming Console or any other Programming Device
via a peripheral bus using this port. The following communications modes are
supported: Host Link, no-protocol, 1:1 Data Link, and 1:1-mode NT link.
Connector Pin Assignments
Pin assignments for the RS-232C port are given in the following table.
Pin
1 FG
6
2 SD (TXD)
3 RD (RXD)
4 RS (RTS)
5 CS (CTS)
9
6 +5V (see note)
7 ---
8 ---
Abbreviation
Field ground
Send data
Receive data
Request to send
Clear to send
Power supply
Not used.
Not used.
Section 3-1
Peripheral port Built-in
RS-232C port
No Yes
No Yes
Peripheral port
Name Direction
---
Output
Input
Output
Input
---
---
---
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