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Why is it that operation will become slow if GT11 is connected to the 2ch port of a FP-XCOM6 communication cassette?

ID:
1080
Issued:
Dec 25th, 2007
Updated:
May 16th, 2013

If GT11 is connected to the 2ch port of a FP-XCOM6 communication cassette (RS485x2ch type), operation of a switch or a lamp may become slow and it may not operate. A setup of COM2 (2ch port) is a computer link. In addition, in COM1 (1ch port), it operates normally satisfactory. Why is it?

ANSWER
Since the change timing of transmission and reception of RS485 does not suit the cause of generating, it is why communication broke off and carried out, and was and the abnormalities in communication occurred. Moreover, the change methods of transmission and reception differ by 1ch of FP-X COM6 cassette, and 2ch(es). For the reason, a difference occurs in communication.

Please set delay time to both FP-X and GT11 display for indication as a measure.
FP-X: On a program, please execute SYS1 command and lengthen COM2 response time.
GT11: Please set up delay time by COM port communication setup of a display for indication.

Cautions) Please set it as FP-X:1ms and GT11:5-10ms, and try.
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