TCi MFC A - Page 51

MFC Kit Instructions 5.0 PQconnect Option
48
Write Parameters:
Table 22: Network Interface INPUT Register Map
Waveform Data
The waveform data displayed by the PQconnect is available in the Modbus Read Analog Input Register
data space (function code 4) at the following addresses:
Table 23: Waveform Data
Waveform Phase
Waveform Start Address
Waveform Length
Phase A
0
512
Phase B
512
512
Phase C
1024
512
The waveform data is scaled in units of tenths of Volts. For example 6787 would equal 678.7 Volts.
Status Detection History Data
The Status Detection History data displayed by the PQconnect is available in the Modbus Read Analog
Input Register data space (function code 4) at the following addresses:
Table 24: Status Detection History Data
Waveform Phase
History Record Start Address
History Record Length
History Record 0
1536
16
History Record 1
1552
16
History Record 2
1668
16
…
…
…
History Record 99
3136
16
The history record is circular buffer of 100 records from index 0 to 99. When the history buffer fills up the
oldest record is overwritten. The newest entry in the history record is at index 0 and the oldest entry is at
index 99.
A history record is logged each time the status detection parameter 210 value changes.
Each history record is a collection of 16 bytes with the following format:
SYS_NULL_EN
820
Input
0 = Disabled
1 = Enabled
System auto null calibration
enable. This value auto
clears to 0 when calibration
complete.
DSP_MODEL_NUM
902
Input
1301 = Sinewave
Filter
Filter model number
SYS_SERIAL_NUM_2
903
Input
Parameter contains
UUUU in the
UUUULLLL-NN serial
number format.
Unit serial number section -
upper 16 bits of unit job
number
SYS_SERIAL_NUM_1
904
Input
Parameter contains
LLLL in the
UUUULLLL-NN serial
number format.
Unit serial number section -
lower 16 bits of unit job
number
SYS_SERIAL_NUM_0
905
Input
Parameter contains
NN in the UUUULLLL-
NN serial number
format.
Unit serial number section -
two-digit unit number