Mitsubishi 00JCPU User Manual page 320

(5) Setting of transmission specifications
Set Transmission speed, Sum check, Transmission wait time, and Run write setting of the serial communication
function in the Serial tab of the PLC parameter dialog box.
• Select "Use serial communication" in communication with the personal computer or HMI.
• Set Transmission speed, Sum check, Transmission wait time, and Run write setting in the tab.
Click here to use the serial
communication function.
Set Transmission speed,
Sum check, Transmission
wait time, and Run write
setting.
(6) Precautions
(a) Switching connection to GX Developer during communication with such as HMI
The CPU module can switch connection to GX Developer during communication with the personal computer or
HMI with the serial communication function.
However, the personal computer or HMI in communication by the serial communication function results in a
communication error.
For startup methods of the personal computer and HMI when they are reconnected to the CPU module, refer to
the manual for used device.
(b) Transmission speed set in the Transfer Setup screen
When "Use serial communication" is selected, the transmission speed set in the Transfer setup screen of GX
Developer is ignored.
(c) Communication error
If any of the following conditions is met, no response is returned (a communication error occurs). Take a
corrective action.
• The serial communication function is set not to be used.
• Communication is made at different transmission speed and data format.
• A frame to be sent has no correct starting end or terminal.
*1: When "Sumcheck enable" is set, the sumcheck code is included.
•
The frame identification number of a frame to be sent is incorrect.
•
The number of transmission bytes is under the header part size.
6 - 140
Figure 6.94 Serial tab
• 3C frame format 4: ENQ/CR + LF
• 4C frame format 4: ENQ/CR + LF
*1
• 4C frame format 5 : DLE+STX/DLE + ETX