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CHAPTER8 PARAMETERS
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8.1  PLC Parameters
 
(10) Serial   Note8.2íç1
The transmission speed, sum check, transmission wait time, and RUN write setting for using the serial 
communication function of the CPU module are set.
注1
Figure 8.10 Serial
Table8.10 Serial setting list
Item
Parameter 
No.
Description Setting range Default Reference
Use serial communication
100E
H
Select the item when using the 
serial communication function.
Selected/deselected Deselected
Section 6.23
Transmission speed
Set a transmission speed for data 
communication with the external 
device.
9.6kbps, 19.2kbps, 38.4kbps, 
57.6kbps, 115.2kbps
19.2kbps
Sum check
Set whether to add a sum check 
code to a message sent or 
received when using the serial 
communication function, 
according to the specifications of 
the external device.
Selected/deselected Selected
Transmission wait time
Set a period of waiting time on the 
Basic model QCPU side in case 
the CPU module cannot receive 
data immediately after the 
external device sends data.
No waiting time/10ms to 
150ms (in increments of 
10ms)
No waiting time
RUN write setting
Enable or disable writing of data 
from the external device to the 
running CPU module.
Selected/deselected Deselected
Note8.2
When using the serial communication function for the Q02UCPU, check the versions of the CPU module and GX 
Developer. (  Appendix 2)
The Q03UDCPU, Q04UDHCPU, Q06UDHCPU, Q10UDHCPU, Q13UDHCPU, Q20UDHCPU, Q26UDHCPU, and 
Built-in Ethernet port QCPU do not support the serial communication function.
Universal