User manual X10 XM10

[. . . ] to develop a system to control X-10 Modules, and receive X-10 signals from remote sensors (P. I. R. motion detectors for example) X-10 Code transmission To transmit X-10 signals the controller must supply 1 ms . envelopes. These envelopes must be as close as possible to the zero crossing point of the AC line (see timing diagrams). An opto- coupled output representing the zero crossing point of the power line is provided for the controller to which X-10 codes are to be synchronised. [. . . ] This means that in a multitransmitter system the controller can minimise contention between transmitters. For example, if after detecting that the line is free, a transmitter waits for a random number of power line half cycles before transmitting, the chance of collision is reduced. A different priority can be assigned to each transmitter by including a fixed delay before the random delay. Important Safety Notice Zero volts in this product is directly connected to one side of the AC line. Therefore, for safety, an ISOLATING power transformer MUST be used when attempting any internal measurements. The power supply in the two-way interface are capacitively derived from, and directly referenced to, the 230V AC power line. Care should be taken when monitoring any internal circuitry with an oscilloscope, as the OV reference in the two-way interface are NOT isolated from 230 volts. X-10 Protocol The tables in Figure 1, show the Binary Codes to be transmitted for each House. The Start Code is Always 1110 which is a unique code and is the only code which does not follow the truecomplement relationship on alternate half cycles. -2- X-10 protocol for the Marmitek XM10 OEM Controller Figure 1 House Code and Key Code Tables House Code Key Codes H1 H2 H4 H8 D1 D2 D4 D8 A0 1 1 0 1 0110 B1 1 1 0 2 1110 C0 0 1 0 3 0010 D1 0 1 0 4 1010 E0 1 0 1 5 0001 F1 1 0 1 6 1001 G0 0 0 1 7 0101 H1 0 0 1 8 1101 I0 1 1 1 9 0111 J1 1 1 1 10 1 1 1 1 K0 0 1 1 11 0 0 1 1 L1 0 1 1 12 1 0 1 1 M0 1 0 0 13 0 0 0 0 N1 1 0 0 14 1 0 0 0 O0 0 0 0 15 0 1 0 0 P1 0 0 0 16 1 1 0 0 All units off 0 0 0 0 All lights on 0 0 0 1 On 0 0 1 0 Off 0 0 1 1 Dim 0 1 0 0 Bright 0 1 0 1 All Lights Off 0 1 1 0 Extended Code 0 1 1 1 Hail Request (1) 1 0 0 0 Hail Acknowledge 1 0 0 1 Pre-Set Dim (2) 1 0 1 X Extended Data (analog) (3) 1 1 0 0 Status = on 1 1 0 1 Status = off 1 1 1 0 Status Request 1 1 1 1 D16 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 (1) Hail Request is transmitted to see if there are any other X-10 transmitters within listening range. This allows the O. E. M to assign a different House code if a . Hail Acknowledge. (2) In a Pre-Set Dim instruction, the D8 bit represents the Most Significant Bit of the level and H1, H2, H4 and H8 bits represent the 4 Least Significant Bits. (3) The Extended Data code is followed by 8 bit bytes which can represent Analog data (after A to D conversion). There should be no gaps between the Extended Data code and the actual data, and no gaps between data bytes. The first 8 bit byte can be used to say how many bytes of data will follow. If gaps are left between data bytes, these codes could be received by X-10 Modules causing erroneous operation. Extended Code is similar to Extended Data: 8 Bit bytes which follow Extended Code (with no gaps) can represent additional codes. This allows the designer to expand beyond the 256 codes presently available. -3- X-10 protocol for the Marmitek XM10 OEM Controller Extended message format Start Code HC / inv HC Ext / inv Ext DC / inv DC Data / inv Data Command / inv Command Command / inv Command House Code 2 bits 4 bits 1 1 0 0 H1 H2 H4 H8 Extended code 5 bits 01111 Unit code 4 bits 8 bits D1 D2 D4 D8 D128 . . . 4 bits Func. /Func 4 bits The command field is split into two nibbles: Type and Function. Example of Extended Data for light sensor: Light sensor will respond to messages with the previous serial format and the response will be in the same format. Request for light data for the module addressed in the House Code and Unit Code fields: Start Code HC / inv HC Ext / inv Ext DC / inv DC Data / inv Data Command / inv Command Command / inv Command House Code 2 bits 4 bits 1 1 0 0 H1 H2 H4 H8 Extended code 5 bits 01111 Unit code 4 bits 8 bits D1 D2 D4 D8 D128 . . . [. . . ] An opto-coupled 50 Hz square wave is provided at the output of the two-way interface. X-10 codes generated by the controller are to be synchronised to this zero crossing reference. The X-10 code envelope generate by the controller is applied to the two-way interface which modulates the envelope with 120 kHz, and capacitively couples it to the AC power line. Opto-Couple Signal Imput The input signal required from the O. E. M product is the signal . envelope. [. . . ]