Use the search feature to view Kepware's repository of more than 500 Knowledge Base articles. Narrow your results or type your query into the search field below.

Alternatively, if you are unable to find a solution, we have an additional resource - our PTC eSupport Portal . If you are prompted to log into the eSupport Portal, you can use your My Kepware credentials. Need a My Kepware account? Create one here .

Search Solution Results By:
View All Solutions

Kepware Knowledge Base: Solution


Checksum Errors Occur When Connecting to Allen-Bradley PLCs Using DF1 with a Modem


Last Update: 2018/11/12

Problem:
Checksum errors are posted to the KEPServerEX Event Log when connecting to Allen-Bradley PLCs using the Allen-Bradley DF1 Driver with a modem.

Possible Cause:
The modem may not be configured for Clear to Send (CTS).

Solution:
In the modem configuration, set the modem to Clear to Send.

Related Protocols
Allen-Bradley DF1