GE PACSystems RX3i User Manual page 75

%Q Configuration Values
GFK-2749
This table shows the settings for Grid 1. The same settings apply to the Grid 2 control bits.
These bits must be set during the first PLC scan when the PLC transitions to run mode.
%Q offset 2, 3 & 4 and 18, 19 & 20 set the PSM for the field voltage and power
configuration. Setting these values incorrectly will yield invalid readings. All remaining bits
may be changed during run mode to adapt to changing field conditions.
%Q Bit
Offset Function
1 GRID 1 Operation
2 GRID 1 Voltage Selection
3 GRID 1 Grid Operational Mode
4 GRID 1 Connection mode
5 GRID 1 PTA_CA measurement
6 GRID 1 CTA measurement
7 GRID 1 PTB measurement
8 GRID 1 CTB measurement
9 GRID 1 PTC measurement
10 GRID 1 CTC measurement
11 GRID 1 CTN measurement
12 GRID 1 Waveform Capture
13 GRID 1 Delta Mode
14 Reserved
15 GRID 1 Energy reset
16 Relay open
17 – 31
Grid 2 control bits
32 Relay close
Chapter 3 Configuration and Data Transfer
Value Comment
1 Enable grid 1
0 120VAC range
0 Single phase
1 3-wire, single phase using PTA and
PTB
1 VA1 measurement is on
1 IA1 measurement is on
1 VB1 measurement is on
1 IB1 measurement is on
0 VC1 measurement is off
0 IC1 measurement is off
0 IN1 measurement is off
0 Set this to capture a waveform
0 Delta Mode is for 3-phase
0 Always zero
0 Set this to reset Energy value to Zero
1 Always 1 for signal phase
X Set for desired operation of Grid 2
0 Always 0 for signal phase
3
3-31