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(1) Specifications
(a) Transmission specifications
The following table lists the transmission specifications used for the serial communication function. Check that
the specifications of the personal computer or HMI from other companies used match those in the following
table.
Communication method
Synchronization method
Transmission speed
Data format
MC protocol format
identification)
*3
Frame
Transmission control
Sumcheck code
Transmission wait time
Online change
Overall cable distance
Line configuration (connection, data
communication)
*1
The item is set in the PLC parameter of the programming tool. ( Page 370, Appendix 1.2 (13), Page 372, Appendix
1.2 (14))
*2
This control is performed only when data are communicated via RS-232.
*3
Relationship between the MC protocol formats and frames is shown below.
Communication using ASCII
code
Communication using binary
code
228
Item
• When RS-232 interface of CPU
*1
• When RS-422/485 adapter is used:
*3
(auto
*1
Include/Not include
No wait time, 10 to 150ms (in increments
*1
of 10ms)
*1
Enable/Disable
• When RS-232 interface of CPU
• When RS-422/485 adapter is used:
Function
QnA-compatible 3C frame
QnA-compatible 4C frame
QnA-compatible 4C frame
Setting range
module or RS-232 adapter is used:
9600bps, 19200bps, 38400bps,
57600bps, 115200bps
1200bps, 2400bps, 4800bps,
9600bps, 19200bps, 38400bps,
57600bps, 115200bps
module or RS-232 adapter is used:
1:1
1:1, 1:n, n:1, m:n
Default
Full-duplex communication
Asynchronous method
19200bps
• Start bit: 1
• Data bit: 8
• Parity bit: Odd
• Stop bit: 1
• Format 4 (ASCII)
• Format 5 (binary)
• QnA-compatible 3C frame
• QnA-compatible 4C frame
*2
DTR/DSR flow control
Include
No wait time
Disable
15m
: Available, : Not available
Format 4
Format 5
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