Omron NT631C manual CPU Bus Unit Settings, Setting at Host

Connecting to the RS-232C Port at the Host Section 4-1

Connecting to a CVM1/CV- series Host Link Unit

CVM1/CV-series Rack-mounting Unit: CV500-LK201

ACVM1/CV-series Host Link Unit (CV500-LK201) has two connectors (com- munications ports 1 and 2). Either of these ports can be used for connection to an NT631/NT631C by the RS-232C method. However, since the connec- tors at these ports are of different types, a cable that matches the connector must be prepared.

•Communications port 1

Communications port 1 is a 25-pin connector for RS-232C use only.

•Communications port 2

Communications port 2 is a 9-pin connector which allows selection of the RS-232C or RS-422A method. When this port is used with the RS-232C method, the I/O port selector switch on the front of the PT must be set to RS-232C (the upper position).

CPU Bus Unit Settings

When connecting to a CVM1/CV-series Host Link Unit, set the following com- munications conditions for the CPU Bus Unit settings.

Item	Setting at Host
Communications speed	Set the same speed as set at the NT631/NT631C(*1)
Transfer code	ASCII, 7 data bits, 2 stop bits
Parity	Even
1-to-1, 1-to-N	1-to-N(*2)
Instruction level	Level 1, 2, 3

*1 Set the host link communications speed at 9600 bps or 19200 bps with the memory switch at the NT631/NT631C. For details, refer to 6-7-2 Setting the Host Link Method (page 155).

*2 The 1-to-N setting enables BCC (Block Check Character). It is not actually possible to connect more than one NT631/NT631C in a single host link.

Set the CPU Bus Unit settings directly from a Programming Device (e.g. CX- Programmer).

For details on the CPU Bus Unit settings, refer to the SYSMAC CVM1/CV- series Host Link Unit Operation Manual (W205-E1-@).

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