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

["dca" <d-anton@xxxxxxxxx>]

Dave Houston ,

You are absolutely right!
A delay of 25ms solved the problem.

Lots of THANKS.
Gratefully
dca

? "Dave Houston" <nobody@xxxxxxxxxxxx> ?????? ??? ??????
news:437fcd89.69181516@xxxxxxxxxxxxxxxx
> 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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>