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
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
3
4
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