CAT EMCP 4 - 5.8 TIMERS, COUNTERS, TOTALS, AND ENERGY; ENERGY DATA; REAL TIME CLOCK; SERVICE METERING

Application and Installation Guide EMCP 4 SCADA Data Links
©2013 Caterpillar
All rights reserved. Page 30
Bits 31:24 = UNUSED, set to zeros
Bits 23:5 = SPN (0 to 524287)
Bits 4:0 = FMI (0 to 31)
 Generator Frequency within Limits (1067) – indicates whether the generator frequency is within
the underfrequency shutdown and overfrequency shutdown limits
 Generator Voltage within Limits (1068) – indicates whether the generator voltage is within the
undervoltage shutdown and overvoltage shutdown limits
 Bus Voltage within Limits (1069)
 Engine Protection has Shut Down Engine (1275) – indicates that the engine ECM has shut down
the engine based on its protective logic, rather than based on a command from the EMCP 4
5.8 TIMERS, COUNTERS, TOTALS, AND ENERGY
ENERGY DATA
The EMCP 4 calculates real and reactive energy provided by the generator set by measuring the power
provided by the generator set over the amount of time the generator set is providing the power.
 Generator Total Real Energy Exported (144) – in kilowatt-hours
 Generator Total Reactive Energy Exported (146) – in kilovar-hours
REAL TIME CLOCK
Both of these register sets share the same data format, which is given below.
 Real Time Clock (900)
 Update Real Time Clock Command (903)
Byte Resolution Offset Data Range
5 1 year / bit 1985 years 1985 to 2235 years
4 0.25 days / bit 0.75 days (12:00-6:00am on day 1 = 0x01) 0 to 62.5 days
3 1 month / bit 1 month (Jan = 0x01) 0 to 250 months
2 1 hour / bit 0 hours (midnight = 0x00) 0 to 250 hours
1 1 minute / bit 0 minutes (HH:00 = 0x00) 0 to 250 minutes
0 0.25 seconds / bit 0 seconds (HH:MM:00 = 0x00) 0 to 62.5 seconds
See Chapter 7 for reading example.
SERVICE METERING
The EMCP 4 counts down to a recommended service interval, and reports the countdown in weeks, days,
and hours. Service personnel can reset the service interval counter to restart the countdown at the end of
a service call.
 Engine Operating Hours (204)
 Service Maintenance Interval Hours Remaining (210) – engine operating hours remaining until
service is due; negative indicates that service is overdue
 Service Maintenance Interval Days Remaining (212) – calendar days remaining until service is
due; negative indicates that service is overdue
 Service Maintenance Interval Weeks Remaining (299) – whole calendar weeks remaining until
service is due; negative indicates that service is overdue