Hello All,

Having some issues getting the NEC RS232 control to function with the Crestron system. Have a TPS-4500 touch panel, and a PRO2 controler. Have all the program in place for the touch panel to have on and off buttons on the NEC Plazma monitors (61 and 42 inch) have as NEC stated to "cross-over" the 232 cable to the comm port. (2-3, 3-2, 4-6, 6-4, 5-5, 7-8, 8-7 for pin outs from unit to unit) I can see the program which I've uploaded into the PRO2 my program for control and can select to view that comm port leaving the Crestron equip and see what command string the NEC manual calls for leaving the Crestron. Only thing, the NEC asks for the protocal settings to be as HEX, I don't exactly know how to change the output ports of the Crestron to HEX?

Any suggestions..?

Thanks for reading,
Gary

Gary, There is a crestron forum on yahoo. You will have a better chance of getting it answered there

[Link: groups.yahoo.com]

There is a few modules in the database fro the NEC as well, I think there is one in simpl windows too

Thanks, will give them a shot too, when the owner of the forum gives my regristration application some attention! Or what ever to allow me to post.
Tks.

You wouldn't change the settings at all. The strings to the plasma need to be sent in Hex as apposed to decimal or ascii. An example of an Ascii string might be something like.. send_string, "'POWER ON'" An example of a Hex string might be send_string,"$0A,$FF,$3D,$0A" The Hex commands that you need to send should be laid out in the NEC rs-232 protocol document.

I have put those very commands from the NEC RS232 protocol documentation into the Crestron string to be sent to the NEC. Something like 90H40H80HDLS (I'm not at work this moment and thats about all I can remember for the moment but it has a couple more sets of three charicter sets missing)
Thanks

If you are programming in Simple windows, go over to the HELP section and look up the serial I/O, which I assume you are using. You have to make sure you enter the correct setting in the bottom of the serial I/O to send HEX. I am not going to give you the answer here.
I have not done a NEC in a while, but I remember only three wires, RX/TX and ground. NExt, make sure you have the Com baud rate and other settings correct in the configuration manager.

Will give it a try first thing in the AM,

Thanks,
Gary

There is a Crestron Module for NEC plasma but I don't recall the cable being crossover type. It's been about three years maybe four. I'll look in my laptop tommorow and check back.

The mfg manual states that, so that was what I went on. Thanks for checking.
Gary

Your membership request was approved *four minutes* after you submitted it, on a Sunday evening no less -- I think that was pretty good "attention"!

Tony you are slacking! I guess the southern slow pace is to blame! LOL!

Try this string for Power On with Crestron
\x9F\x80\x60\x4E\x00\xCD
That is from The Pioneer PDP6100 and Elite PRO1410HD.
You can download the full command list (well commomly used commands) at
[Link: pioneerelectronics.com]
The PRO1410 commands should work just fine.
John

Very funny, Dave -- maybe you're right :-)

I connect Nec plasma's to Crestron on a weekly basis and i can tell you that the configuration for wiring is 5 wire X-over.

2-3, 3-2, 5-5, 7-8, 8-7.

If your ever unsure if X-over cabling is required or if it is straight through do the following.

Make sure both end devices have the DB-9 connector plugged in and both devices are powered up

Grab multimeter and switch it to under 20v DC

Black probe to pin 5, red probe to pin 2, you should read negative voltage between 6 and 9 volts typically.

swap the red probe to pin 3 and you should also read a similar negative voltage.

If one of the readings was either positive or not showing voltage then switch pins 2 and 3 at one end and re-measure.

If you require a 5 or 7 wire configuration and pins 2 and 3 are crossed, then all other pairs will also be crossed and vice versa.

Also remember as a rule of thumb that if you only require 3 wire configuration, it still won't do any harm to have 5 or 7 wires connected so long as all pairs are wired the same way (crossed or straight through).

Be carefull to make sure that both ends are plugged in and powered up because if you only have one end plugged in, you will read a voltage leading you to believe that you need to swap the pins when in fact, that might not be the case.

You can get the odd case where you also need to short some pins on a connector but that is rare and what i have said above will get you through the vast majority of testing for correct connection.



Hope this helps someone.

Simon.

I don't care that your manual says you need a crossover cable. I do care where it says it's RX$, TX$, GND and if necessary, RTS and CTS lines will be found on its db9.

Then I care about where the control system says its pins for RX$, TX$ GND, RTS and CTS are found. Then you will discover if you need a crossover or straight through cable.

Next I'd pay attention to the com port settings.

Finally I'd hook my computer to the NEC directly and fire the strings from the sequence keys in Viewport/setup. You will want a null modem adaptor just in case you do step on incorrectly. Once you can communicate from Viewport ( which is a teminal emulation program. If you don't like Viewport, try HyperTerminal ) I'g go back to Crestron and try again. Rather then test the entire program, try sending basic commands such as power on and power off. Easiest way to do this without rewriting the program is to use Test Manager. Call up the TX$ and RX$ signal names you defined in the program ( ie, NEC_TX$ and NEC_RX$ ) and double click on that signal. You can then type in the string directly. See if that works. If not try it with the null modem in place and type in the string values.

Before you begin debugging a program I like to debug the wiring and serial logic. With some pieces you need to establish communciations and I like to this before debugging the program. If you have you IR wired out of phase or you serial connected to pin 3 when it should be pin 2 you will have an issue no amount of debugging the program will solve. If you are doing a lot of seral control a serial cable tester will save lots of time. Otherwise the advice above is well founded and I'd heed it were I in your shoes. Measuring TX$ and RX$ to GND will tell you which is TX$.

Alan