Omron NT631C manual Connecting to the Support Tool, Communications Conditions

Connecting to the Support Tool Section 3-2

1,2,3... 1. In cases where there is a potential difference between the grounds of the NT631/NT631C and the host, ground as shown in Fig. If there is some dis- tance between the NT631/NT631C and host and grounding at a single point is difficult, do not connect the functional ground terminal ( ) of the NT631/NT631C.

2.If the NT631/NT631C is installed in the same panel as equipment that gen- erates noise, such as a motor or inverter, do not ground the functional ground terminal ( ) of the NT631/NT631C.

NT631/

NT631C Host

Grounding at a single point

Note Carry out grounding correctly in order to prevent operating errors due to noise.

3-2 Connecting to the Support Tool

In order to install the system program in the NT631/NT631C, or to transmit screen data created with the Support Tool to the NT631/NT631C, the NT631/ NT631C must be connected to a personal computer with an RS-232C cable.

The NT631/NT631C connects the RS-232C cable from a personal computer at serial port A. When the host is connected at serial port B, the connection with the host can be maintained as it is while the NT631/NT631C is connected to the RS-232C cable from a personal computer.

However, when a bar code reader is being used, it must be disconnected, so that the RS-232C cable can be connected, since they both use serial port A.

RESET

RDA

TRM

RDB

SDA

SDB

CSA

CSB

24V

+DC

PRINTER PORT B PORT A

Serial port A (RS-232C, 9-pin)

Communications Conditions

The communications conditions are automatically set when the system installer and Support Tool are started.

Recommended Connector Cable

Use the cable indicated below.

•CV500-CN228 (length: 2 m), made by OMRON (D-SUB 9-pin, male ⇔ D-SUB 25-pin, male)

•XW2Z-S001 (conversion cable), made by OMRON (D-SUB 25-pin, female ⇔ half pitch 14-pin, male)

•XW2Z-S002 (length: 2 m), made by OMRON (D-SUB 9-pin, male ⇔ D-SUB 9-pin, female)

For details on making a connector cable, refer to Appendix F Making the Cable for Connecting a PLC.

35