Data Sent From The Host Controller To The Psm Module; Mode Control Bits Sent To Psm Module - GE PACSystems RX3i User Manual

Data Sent from the Host Controller to the PSM Module

Mode Control Bits Sent to PSM module

GFK-2749
The RX3i CPU sends 32 %Q bits of Mode Control data and 2 %AQ Parameter words
every sweep to the PSM module.
The application logic must apply initial values to these bits on the first RX3i scan.
The application can change these settings during operation to modify measurement
modes in response to changing conditions.
%Q Bit
Offset
1 GRID 1 Operation: 0 = disabled, 1 = enabled
If disabled, the PSM system does no measurements for the GRID 1 power grid.
Note: Both grids (bits Q1 and Q17) must be enabled in order for the PSM module to
act as a 2-source synchronizer.
2 GRID 1 Voltage Selection:
0 = low voltage range (120VAC), 1 = high voltage range (600VAC)
Caution: The voltage range is determined by the physical connections in the
system. Changing this bit to a value that does not match the physical
configuration will result in erroneous power system measurements.
Do not change this value in run mode.
3 GRID 1 Grid Operational Mode: 0 = single phase, 1 = three-phase
4 GRID 1 Connection mode.
Works with the Operational Mode setting to determine system type.
• For single phase mode: 0 = Three single phases
• For three-phase mode:
5 GRID 1 PTA_CA measurement: 0 = not measured, 1 = measured
Refer to "Reconstructed Variables", p. 3-21.
6 GRID 1 CTA measurement: 0 = not measured, 1 = measured
Refer to "Reconstructed Variables" , p. 3-21.
7 GRID 1 PTB measurement: 0 = not measured, 1 = measured
Refer to "Reconstructed Variables" , p. 3-21.
8 GRID 1 CTB measurement: 0 = not measured, 1 = measured
Refer to "Reconstructed Variables" , p. 3-21.
9 GRID 1 PTC measurement: 0 = not measured, 1 = measured
Refer to "Reconstructed Variables" , p. 3-21
10 GRID 1 CTC measurement: 0 = not measured, 1 = measured
Refer to "Reconstructed Variables" , p. 3-21.
11 GRID 1 CTN measurement: 0 = not measured, 1 = measured
Refer to "Reconstructed Variables" , p. 3-21.
12 GRID 1 Waveform Capture: changing from 0 to 1
When the PSM detects a change of this bit from a zero to one, it captures all 128
samples of all seven variables belonging to the grid.
13 GRID 1 Delta Mode: 0 = B phase is common, 1= C phase is common
This bit must be set to 0 if the phase B is used as the common connection for the
other two voltages (North American standard). If the phase C is used as the common
phase in a Delta connection, this bit must be set to 1.
14 Reserved
Chapter 3 Configuration and Data Transfer
Function
1 = Three-wire, single phase (120/240) using
PTA and PTB
0 = WYE, 1 = DELTA
3
3-19