Introduction:
The PS2Tap sends a 42 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
SOFT_GRID MSB 32*
SOFT_GRID LSB 33*
AIO_DSP_REV MSB 34*
AIO_DSP_REV_LSB 35*
WIRELESS_LAST_OP 36*
WIRELESS_LAST_REG 37*
WIRELESS_LAST_RESULT MSB 38*
WIRELESS_LAST_RESULT LSB 39*
CRC MSB 40 high byte of CRC on everything after STX and before CRC
CRC LSB 41 low byte of CRC
* These bytes only in PS2Tap firmware versions newer than June 1, 2011.
Data Constants:
System State
0 INIT_PROCESSOR
1 INIT_PARAMS
2 RESET
3 WAITING INITIALIZING (STARTING COUNTDOWN)
4 WAITING INITIALIZING (COUNTDOWN DELAY)
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 OVER FREQ The frequency of the utility grid voltage went out of range. The upper range threshold was crossed, or a ROCOF fault occurred.
8100 AC UNDER FREQ The frequency of the utility grid voltage went out of range. The lower range threshold was crossed
Example Code:
Java Parsing Class
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;
}
