Mitsubishi Electric MELSEC-Q Series User Manual page 138

7 FUNCTION
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(1) Specifications
(a) Transmission specifications
The following table indicates the transmission specifications of RS-232
used for the serial communication function of the CPU module.
Use the serial communication function after making sure that the
specifications of the personal computer, Display device or the like match
those of the following table.
Item
Communication system
Synchronization system
Transmission speed 1
Data format
MC protocol format 2
(Automatic judgment)
Frame 2
Transmission control
Sum check 1
Transmission wait time
Write during RUN setting
Extension distance
1: Can be set in the PLC parameter setting of GX Developer.
2: The relationships between the MC protocol formats and frames are indicated in the
following table.
Communication in ASCII code
Communication in binary code
Default
Full duplex communication
Asynchronous system
19.2kbps
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
DTR/DSR control
No
1 No wait
1 Not enabled
15m
Function
QnA-compatible 3C frame
QnA-compatible 4C frame
QnA-compatible 4C frame
MELSEC-Q
Setting Range


9.6kbps, 19.2kbps, 38.4kbps,
57.6kbps, 115.2kbps




Yes, No
No wait, 10ms to 150ms (10ms
increments)
Enabled, Not enabled

Format 4 Format 5
: Usable, : Unusable
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