CAT EMCP 4 - 5 EMCP 4 SCADA DATA POINTS; 5.1 GENERATOR AC MONITORING; VOLTAGE DATA

Application and Installation Guide EMCP 4 SCADA Data Links
©2013 Caterpillar
All rights reserved. Page 18
5 EMCP 4 SCADA DATA POINTS
NOTE: For EMCP 4 controller software version 4.2 PROD and beyond, all control-related
write register capabilities are DISABLED by default. Modbus control via write
registers can be enabled by configuring the “Remote Genset Control Enable Status”
setpoint under CONFIGURE > ALL SETPOINTS > CONTROL > AUTO
START/STOP.
5.1 GENERATOR AC MONITORING
This is the full set of AC data as sensed at the generator output. All of the generator AC data available on
the EMCP 4 display are available via Modbus. Depending on the generator configuration however, some
data may not be valid. Table 5-1 details all of the variations.
T
ABLE 5-1: AC DATA VALID, BY WIRING CONFIGURATION
Star 3-Wire Delta 4-Wire Delta
2-Wire
1-Phase
3-Wire
1-Phase
Gen Freq (102) √ √ √ √ √
V
L-L AVG
(100) √ √ √ √ √
V
A-B
(108) √ √ √ √ √
V
B-C
(109) √ √ √ - -
V
C-A
(110) √ √ √ - -
V
L-N AVG
(148) √ - √ - √
V
A
(114) √ - √ - √
V
B
(115) √ - √ - √
V
C
(116) √ - √ - -
I
AVG
(101) √ √ √ √ √
I
A
(111) √ √ √ √ √
I
B
(112) √ √ √ √ √
I
C
(113) √ √ √ - -
VOLTAGE DATA
 Generator Average Line-Line AC RMS Voltage (100)
 Generator Phase A Line-Line AC RMS Voltage (108)
 Generator Phase B Line-Line AC RMS Voltage (109)
 Generator Phase C Line-Line AC RMS Voltage (110)
 Generator Phase A Line-Neutral AC RMS Voltage (114)
 Generator Phase B Line-Neutral AC RMS Voltage (115)
 Generator Phase C Line-Neutral AC RMS Voltage (116)
 Generator Average Line-Neutral AC RMS Voltage (148)
 Generator Average Line-Line AC RMS Voltage Percent (163) – percent of Generator Rated
Voltage (setpoint)