Re: CM11A does not get ready for X10-trasmission with Programmable Logic Controller

[nobody@xxxxxxxxxxxx (Dave Houston)]

Your PLC may be responding too quickly. Those who have controlled the CM11A
with microcontrollers have found they had to insert a delay between
receiving the checksum and sending the 00h. Try 25ms.

"dca" <d-anton@xxxxxxxxx> wrote:

>I am trying to control an X10 installation from a Programmable logic
>controller (PLC S7-200) via a CM11A.
>For test purposes there are only A2 (AM12) and A5(LM15) installed.
>
>The following work without any problem:
>-Get status 8BHEX
>-Write time 9BHEX
>-X10 reception (5AHEX from CM11A) and subsequent response C3HEX to receive
>serial data buffer
>(Note: I occcasionaly used TM13 (as A1) and a remote control unit to trigger
>the serial ring on CM11A)
>
>
>However when  I try X10 transmission the following happens:
>
>PLC                                      CM11A
>
>046eHEX
>//address A2
>                                            72HEX
>//checksum ok
>00HEX
>//  acknowledge
>                                             00HEX
>// not OK, ought to be the expected 55HEX
>
>
>if one continues with the function
>0662HEX
>//function A On
>                                            68HEX
>//checksum ok
>00HEX
>//  acknowledge
>                                             00HEX
>// not OK, ought to be the expected 55HEX
>
>and A2 remains Off.
>
>Just in case, I changed the CM11A with a brand new one. To no avail.
>
>Both the CM11As work fine with the ActiveHome AND HomeSeer software on my
>PC.
>
>I would be grateful for any suggestions.
>Many thanks in advance
>
>dca
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