Yaskawa MP900 Series MPLOGGER - Manual (Page 41)

4.5 Communications Driver Settings
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4. Select a desired Communications Port and set the parameters in the Logical Port Set-
tings section of the dialog box.
Description of Parameters
• Port Name
Indicates the communications path. The port name can be up to 20 characters long.
• Port Kind
Select either Memobus or CP-218.
(If the
Get Port Assignments Button is clicked, this setting is not required.)
• Physical Port
This setting is required if the port kind is set to Memobus. Select the serial port actu-
ally used for communications.
Select from COM1 to COM16.
(If the
Get Port Assignments Button is clicked, this setting is not required.)
• Protocol
Cannot be set. (Applicable only for sending messages.)
• Timeout
Specifies the maximum length of time to wait for a response after sending a com-
mand. If there is no response within this time frame, a communications error will
occur. The default setting is 3 seconds.
• No. of Retries
Specifies the number of times to attempt to establish communications again when a
communications error occurs. The default setting is 2.
5. When all parameters have been entered, click the Add Button. The settings will be
saved and the information will be displayed in the Communication Port Properties List
of the dialog box.
6. To delete the driver assignments of redundant communications ports, select the commu-
nications port from the Communication Port Properties List and click the Remove But-
ton. A confirmation message will be displayed and the assignments will be deleted.
The following must be considered when setting the timeout function.
If the timeout is too short for the system configuration, a communications error may occur before all
the data is transferred. The timeout setting must be set to approximately three times the length of the
actual cycle time.
For more information on the actual cycle time, refer to 5.3.2 Server Menu .
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