mpec SA380-IT, Руководство пользователя

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Resistance to Earth (Positive Leg) R
B
k Reported for all five circuits
Earth Loop Resistance R
E
Unit Status Status NA Collection of binary status information (see table below)
Temperature Temp
o
C
Internal temperature
Up-Time Time minutes Period of time since last restart
Signal Strength GSM Signal dB GSM modem signal strength
Note that for AC monitored circuits, R = R and R = R
B L N L.
The status message is a 16-bit integer. with '0' being false, and '1' being true. Each bit has the following meaning:
Bit Meaning
0
Calibration Fault
1
Internal Hardware Fault
2 Calibration or Hardware Fault; or device in suspended mode
3 Earth Loop Fault
4 Any Monitored Circuit has an Over voltage
5 Not used
6 Volt Free Contact State (0 closed, 1 open)
7 Not used
8 Not used
9 Not used
10 Internal Monitored Circuit Fault
11 Monitored Circuit 1 Fault
12 Monitored Circuit 2 Fault
13 Monitored Circuit 3 Fault
14
Monitored Circuit 4 Fault
15
Monitored Circuit 5 Fault
2.10.1 Protocol Selection
Two transmission protocols can be selected for sending data to an EAMS:
MIMOSA
Text based protocol compatible with the Network Rail Intelligent Infrastructure and MPEC Centrix systems.
Plain text, human-readable, but large data messages.
Lengthy back-off periods (up to 2 hours) in the event of loss of communications.
Does not support engineering units.
RailDAQ
Binary protocol compatible with the MPEC Centrix system.
Small, but unreadable binary messages (more than 10 times smaller than MIMOSA).
Minimal back-off periods (a few seconds) in the event of loss of communications.
Message size and back-off policy offer significant reliability improvements over MIMOSA.
Supports engineering units.
2.10.2 The Rules of Acquisition
Rounding and Truncation
After performing a measurement, the software will round and cap all data to make it simpler to interpret.