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

[nobody@xxxxxxxxxxxx (Dave Houston)]

You can probably reduce the delay to 2-3ms. I suggested 25 because I knew
that would 'fix' this but I also knew it was much more than you probably
need.

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

>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
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>