User manual

6–8
Chapter 6 – Initializing the LT
LT Series User Manual
When the RECEIVE TIMEOUT value is set to 30 seconds or
more and the occurrence of an external communication error
has not yet cleared, transferring screen data files may result
in an error message appearing on your PC.
RETRY COUNT
Use this setting item to designate the number of times the LT tries to send data to
the external device when an external communication error occurs. After the LT
unit’s specified number of attempts has failed to send data to the external device,
an error message will appear on the LT.
The default value for the Retry Count setting is “2.”
CONTROL
The Data Flow CONTROL setting prevents the overflow of data transmitted and
received. Select either X-CNTRL or ER-CONTRL.
COMMUNICATION FORMAT
Use the RS-232C, the RS-422 (4-line), or the RS-422 (2-line) for the Communica-
tion Format setting.
When using an RS-422 cable and the Memory Link format,
be sure to select the 4-line option.
LT Editor Device Connection Manual (included with the LT Editor
software), GP-PRO/PBIII Device/PLC Connection Manual (in-
cluded with the C-Package software)
6.4.2 COMMUNICATION SETUP
This section explains how to use the Retry command to deal with errors, including
those that occur during communication between the LT and external devices.
RECEIVE TIMEOUT
Use a numeric value to set a period of time in which the LT can receive data from
the external device. When the cable is not connected, data communication will
Timeout after one second, regardless of this setting’s value.
The default value for the RECEIVE TIMEOUT setting is 10 seconds.
This setting is disabled on the Type A1, Type A2, Type B and
Type B+ units