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Appendix 6 Universal Serial Communications App6-21

• Data Length

Fixed at 8 bits.

• Stop Bit

Stop bit settings are shown below.

1 bit

2 bits

• Code

Fixed at DEC.

• Text Process

When using text process, choose either [LSB to MSB] or [MSB to LSB] in order to make

arrangements for the order of the first and the second bytes in one word.

Standard Type Protocol

The connection mode and transmission mode are set in [Comm. Parameters] under [System Setting].

(Refer to “1. Before Connecting to PLC.”)

The mode contents are as follows.

• Connection mode

1 : 1 Used when one host communicates with one V series unit (1 : 1).

1 : n A maximum of 32 V series units are possible to be connected to the host. (Multi-drop

specifications)

• Transmission mode

There are four transmission modes, depending on whether or not sum check or CR/LF is attached

to the end of transmission and received data, as shown below.

Set whether or not to attach sum check or CR/LF to the end of transmission data.

* indicates that there is an attachment.

[LSB → MSB]

MSB

LSB

15 0

2nd byte 1st byte

[MSB → LSB]

MSB

LSB

15 0

1st byte 2nd byte

Transmission Mode Sum Check CR/LF

1 2 ... 285 286 287 288 289 290 291 292 293 294 295 ... 331 332

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