PACSystems RX3i - Page 72

User Manual Chapter 3
GFK-2749A Jan 2020
Configuration and Data Transfer 68
%Q Configuration Values
This table shows the settings for both grids. 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
Value
Comment
1
GRID 1 Operation
1
Enable grid 1
2
GRID 1 Voltage Selection
1
600VAC range
3
GRID 1 Grid Operational Mode
1
3-phase
4
GRID 1 Connection mode
1
3-wire, Delta power system
5
GRID 1 PTA_CA measurement
1
VA1 measurement is on
6
GRID 1 CTA measurement
1
IA1 measurement is on
7
GRID 1 PTB measurement
1
Vb1 measurement is on
8
GRID 1 CTB measurement
1
IB1 measurement is on
9
GRID 1 PTC measurement
0
C-Phase is common
10
GRID 1 CTC measurement
0
C-Phase is common
11
GRID 1 CTN measurement
0
IN1 measurement is off
12
GRID 1 Waveform Capture
0
Set this to capture a waveform
13
GRID 1 Delta Mode
1
Set this bit for C-Phase Common
14
Reserved
0
Always zero
15
GRID 1 Energy reset
0
Set this to reset Energy value to Zero
16
Relay open
1
Clear this bit (AND set bit 32) to
17– 31
Grid 2 control bits
X
request synchronizing the Grids
32
Relay close
0
Set for desired operation of Grid 2