PS2Tap Data Format

Introduction

The PS2Tap sends a 34 byte long binary data packet using a 2.4 GHz 802.15.4 XBee-PRO wireless transceiver. Channel D is used with the default PAN ID. You will need a XBee-PRO or XBee modem to receive data for your application. We manufacture a variety of XBee and XBee-PRO modems.

Data Format

'#'                 0  STX
UNIT ID PREFIX      1  First character (A-Z) for serial number
UNIT ID MSB         2  high byte of sending station ID
UNIT ID LSB         3  low byte of sending station ID
PACKET LENGTH       4  number of byte for packet including STX through CRC
PACKET TYPE         5  type of packet we are sending, 14
SYSTEM_STATE MSB    6 
SYSTEM_STATE LSB    7 
LAST_FAULT MSB      8 
LAST_FAULT LSB      9
USER_STATE MSB      10
USER_STATE LSB      11
AUTORUN_ENABLED MSB 12
AUTORUN_ENABLED LSB 13
BUS_VOLTAGE MSB     14
BUS_VOLTAGE LSB     15
AC_VOLTAGE MSB      16
AC_VOLTAGE LSB      17
DC_CURRENT MSB      18
DC_CURRENT LSB      19
DC_VOLTAGE MSB      20
DC_VOLTAGE LSB      21
AC_FREQUENCY MSB    22
AC_FREQUENCY LSB    23
OUTPUT_POWER MSB    24 Signed using high bit
OUTPUT_POWER LSB    25
ENERGY_PRODUCED MSB 26
ENERGY_PRODUCED LSB 27
AUTOSTART_COUNT MSB 28
AUTOSTART_COUNT LSB 29
SEQUENCE MSB        30
SEQUENCE LSB        31
CRC MSB             32 high byte of CRC on everything after STX and before CRC
CRC LSB             33 low byte of CRC

Data Constants

System State

0  INIT_PROCESSOR
1  INIT_PARAMS
2  RESET
3  STOP_INIT
4  STOP
5  WAITING FOR WIND
6  AC_RUN_INIT
7  AC_RUNNING
8  DC_RUN_INIT
9  RUNNING
10 FAULT_INIT
11 FAULT
12 MANUAL STOP (PRESS RESET)
13 MANRESET
14 FAULT LIMIT (PRESS RESET)

Error Codes

10   INTERNAL ERROR   IGBT Desat or control logic fault.  An occurrence of this fault requires that the unit be completely powered down to reset it.
1000 DC OVER VOLT 1   The DC Bus voltage has exceeded its maximum threshold
1500 DC OVER VOLT 2   The DC Input voltage has exceeded its maximum threshold
1250 DC UNDER VOLT    The internal DC Boost voltage has dropped below its minimum threshold
2030 AC OVER VOLT     The AC line voltage has exceeded its maximum threshold
2280 AC UNDER VOLT    The AC line voltage has dropped below its minimum threshold
2500 TURBINE PHASE    Indicates that there is a problem with one or more of the turbine input phases.  Bad connection, missing phase.
3000 OVER CURRENT     Phase A line current sensed by the converter module has exceeded its maximum current threshold
3020 OVER CURRENT     Phase C line current sensed by the converter module has exceeded its maximum current threshold
3050 OVER CURRENT     The DC Boost phase of the converter module has exceeded its maximum current threshold
4000 OVER TEMP        The internal high  temperature threshold has been exceeded
4250 UNDER TEMP       The internal low temperature threshold has been exceeded
7000 GROUND FAULT     An input phase appears to be shorted to chassis ground
8000 AC UNDER FREQ    The frequency of the utility grid voltage went out of range.  The upper range threshold was crossed
8100 AC OVER FREQ     The frequency of the utility grid voltage went out of range.  The lower range threshold was crossed

Example Code

Java Parsing Class

• RecordPS2Tap.java

C CRC Function

int16 crc_chk(int8 *data, int8 length) {
	int8 j;
	int16 reg_crc=0xFFFF;

	while ( length-- ) {
		reg_crc ^= *data++;

		for ( j=0 ; j<8 ; j++ ) {
			if ( reg_crc & 0x01 ) {
				reg_crc=(reg_crc>>1) ^ 0xA001;
			} else {
				reg_crc=reg_crc>>1;
			}
		}	
	}
	
	return reg_crc;
}