User`s manual

131
CHAPTER 3 COMMUNICATIONS BY THE MODEM FUNCTION
3
3.4 Start-up of the Modem Function
3.4.2 Initial settings of the serial communication module
This section explains the initial settings of the Q series C24 when data communicating with external device, remotely
notifying a pager receiver and accessing from GX Developer using the modem function.
(1) Switch settings by GX Developer
*1 When the first five digits of the serial No. are 03042 or earlier, the transmission speed cannot be set to 115200 bps for
connection between the Q series C24 and GX Developer via a modem.
Remark
This gives an example of the switch setting when the modem function is used to connect GX Developer to the Q series C24
CH1 side and the programmable controller is accessed. Perform the switch setting similar to this example also when
performing data communication or notification.
[Starting procedure]
"GX Developer"  "PLC parameter"  "I/O assignment"  Switch setting
[Setting example]
Switch setting by GX Developer
Data
communication
Notification
GX Developer access
(For connection to
MELSOFT products)
Remarks
Communication protocol setting 1 to 7 1 to 7 5 
Transmission
specifications
Communication
rate
Setting data
Operation setting OFF (Independent operation) Set both CH1 and CH2 OFF
Data bit setting
(Set according to modem/ TA on local
station)
ON OFF = 7 bit, ON = 8 bits
Parity/non-parity setting OFF OFF = Non-parity, ON = Parity
Even/odd parity setting OFF OFF = Odd, ON = Even
Stop bit setting OFF OFF = 1 bit, ON = 2 bits
Sum check enable/disable
setting
(Set accordingto
system
specification)
OFF/ON ON OFF = Disabled, ON = Enabled
Write during RUN enable
/disable setting
OFF/ON ON OFF = Disabled, ON = Enabled
Setting modification enable
/disable setting
OFF/ON OFF/ON OFF = Disabled, ON = Enabled
Transmission rate setting
(Set according to modem/TA on local station)
*1
(bps)
Station number setting 00 to 31 
Switch No.
Bit
Description Setting value
Position
Specified
value
Switch 1
b0 OFF
CH1
transmissi
on setting
Operation setting Independent
07E2
b1 ON Data bit 8 bits
b2 OFF Parity bit No
b3 OFF Odd/even parity Odd
b4 OFF Stop bit 1 bit
b5 ON Sum check code Yes
b6 ON Write during RUN Allowed
b7 ON Setting modification Enable
b8 to b15  CH1 communication rate setting 19200bps
Switch 2  CH1 communication protocol setting 5 0005
Switch 5  Station number setting 0th station 0000