Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 34)

Installation
Chapter 2
2Ć22
3 ACCEPT UPLOAD/DOWNLOAD
4 ACCEPT WRITES
5 BACKUP OPERATION
6 PLC–2 MASK
ENTER NEXT>
This menu allows you to select options that apply equally to both the
modem port and the Data Highway port of the 1775–KA module. These
options are described below.
Timeout
The timeout is the maximum amount of time that the 1775–KA module
will wait for another station to reply to one of its messages. The allowed
entries are 0 to 9999, expressed in increments of 1/10 second. LIST
displays the timeout as “xxxx/10 SEC”. Thus, if you enter a timeout
value of 100, the timeout period will be 10 seconds and will be displayed
as 100/10 SEC.
The same timeout setting applies to both the Data Highway and the
modem ports. The default timeout setting is 5 seconds, displayed as 50/10
SEC.
The timeout period applies to each individual transmission. Because of
their size, some messages consist of several packets of data. Each
message packet requires a separate transmission. Therefore, the timeout
is restarted for each packet.
If the 1775–KA module waits longer than the timeout period for a reply to
one of its messages, it generates an error code of 37 (Appendix B). The
module then resumes executing the current message procedure at the line
following the one in which the timeout occurred.
LIST keeps you at this timeout level and allows you to make repeated
changes to the timeout value. To return to the preceding (next highest)
level of LIST, press the ENTER key again without entering a new timeout
value.