[chbot] Controlling a CPT-1A-10DA pan and tilt head using AMX (?)

[Mark Atherton]

Thanks Robin. Tried the demo app as suggested, but no luck

Unit is a broadcast unit (not CCTV), manufactured by Fujinon and 
re-packaged by Panasonic (among other OEMs)

Power up codes from the unit are 0x02, 0xB8, 0x01, 0x00, 0x04, 0x03 at 
4800 baud (in binary). The STX (first) and ETX (last) bytes make it look 
suspiciously like 'Panasonic PROTOCOL of CONVERTIBLE CAMERA and PAN/TILT 
SYSTEM'.

Two issues here: P&T unit is not supposed (?) to start messages with MSB 
set, and unit is not supposed to send unsolicited messages.

Having said all that, haven't found a spec for the CPT-1A-10DA unit.

Have tried sending many messages, according to the above spec, but 
nothing useful found so far.

Sent an email requesting help from Fujinon this morning, will be 
interested to see what, if anything happens.

Hopefully see you this evening.

-Mark



On 15/05/2017 12:05 AM, Robin Gilks wrote:
 > Hello everyone,
 >> Chocolate fish time...
 >>
 >> Just playing with a Fujinon CPT-1A-10DA pan and tilt head, these units
 >> are used in the broadcast TV arena. It may use the same protocol as the
 >> EPT-5E series.
 >>
 >> Very little documentation supplied with the product, although appear to
 >> have confirmed that the unit is controlled using RS232.
 >>
 >> The manual for a suitable PSU was supplied, so managed to identify power
 >> and RS232 lines. Dismantled the unit to confirm that RS232 feeds pin 13
 >> of a MAX232 (R1IN).
 >>
 >> After moving the pan channel (by hand) with power removed, the unit
 >> returns to previous position when 12V is applied; am assuming that the
 >> unit works OK.
 >>
 >> This unit was originally configured by BCL (now Kordia ?).
 >>
 >> Managed to find a suitable controller (EOP-102J-30E) on eBay for
 >> US$1100; would like to borrow it to do some comms sniffing but that
 >> seems unlikely.
 >>
 >> Finally, spotted that the unit sends a short message from it's RS232
 >> port at power on. Looks like data cells are 200us wide, so maybe a
 >> 4800baud comms channel. Need to explore this more.
 >>
 >> Have found all manner of P&T protocols, some require an address field
 >> (RS485, or RS232) so that adds a further level of uncertainty/excitement
 >> to the proceedings.
 >>
 >> If anyone has experience with such devices, or know where correct
 >> documentation might be acquired, I will be most happy to hear from them.
 >>
 >> This is not a commercial project, and hair is being pulled out by the
 >> clump ...
 >>
 >> Regards, Mark
 > Pelco-D sounds like a favourite. It's very common in pan/tilt devices and
 > is usually RS485 (i.e. balanced) and the default baud rate is 2400bps
 > (although most devices have a command or DIL switches to set it to what
 > you want).
 >
 > This gives  a bit of background
 > https://www.commfront.com/pages/pelco-d-protocol-tutorial
 > and this is a typical device detail
 > 
https://www.epiphan.com/userguides/LUMiO12x/Content/UserGuides/PTZ/3-operation/PELCODcommands.htm
 > and this is the actual spec
 > 
http://hanjindata.lgnas.com:10000/myweb/P1339/PelcoDProtocolManual_1_1.pdf
 >