Internet PLC Forum
General => Technical support => Topic started by: petrus11 on May 25, 2009, 12:49:26 AM
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Hi!
I have problem with the on line monitoring.
Viewing the IO's and the integers and the DM[] works Ok
But when I try to view the Strings page I always get the error message:
No response from Node 101
Please check the following:
1 PLC ID =65 is connected to server
2 Check thart the Id is correct
Anyone knows what the problem is?
Regards Petrus
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Your string variable may contain new line (0x0A) or carriage return character (0x0D) which disrupts the host link communication since on T100M+ PLC these characters are transferred unmodified in the response string and therefore the received string are truncated. Try not to include these characters in the string variable. If you need to transmit string that contains these character they can be generated in real time when needed:
E.g. PRINT A$+CHR$(13)+B$ ' output a string that contains CR character.
On F-series PLC this problem is resolved as non-printable characters in a host link response for string variable will be encoded in \nn form which is an escape sequence and nn is the hexadecimal value of the ASCII code.