Technical information

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Presentation
The time stamping system is a complete solution providing a SCADA with a
sequence of events that are time-stamped at source, enabling the user to analyze
the source of any abnormal behavior in an automated system.
The SOE (sequence of events) is displayed in the alarm log or in the list of events for
a client such as a SCADA.
Each event in the SOE is a change of value (transition) of a discrete I/O detected by
a time stamping module.
Advantages
Using the time stamping system has the following advantages:
b No PLC programming
b Direct communication between the time stamping modules and the client. If the
time stamping modules are in a Quantum Ethernet I/O drop, the bandwidth of the
PLC communication is not used
b Consistency of the I/O values between the process (time stamping modules) and
the client
b Consistency is maintained irrespective of the operating mode
b No loss of events under normal operating conditions
b Management of Hot Standby congurations on the PLC and/or SCADA
redundancy
Composition of a time stamping architecture
BMXCRA31210 and BMECRA31210 modules
This time stamping module can be at the source of any discrete I/O signal located in
the drop with a resolution of 10 ms.
To avoid losing any events, all events are stored and kept in a buffer located in the
product until OFS takes them.
Synchronization of the CRA module uses the NTP protocol.
BMXERT1604T module
This module has 16 discrete inputs which carry out the time stamping at source
outputs with a resolution of 1 ms.
To avoid losing any events, all events are stored and kept in a buffer located in the
product until OFS takes them.
This module can be placed either in an RIO drop, or in a local rack equipped with a
BM●CRA31210 module.
The CRA module is synchronized via the DCF 77 or IRIG-B standards.
OFS V3.50
OFS V3.50 is used to access events stored in the various buffers in the architecture
and to notify the SCADA of them via the standard OPC DA protocol.
Vijeo Citect V7.30
Vijeo Citect V7.30 receives events transmitted by OFS and displays them in the SOE
or in the list of alarms.
Presentation:
page 4/30
Architectures:
page 4/31
Setup:
page 4/33
Functions:
page 4/34
References:
page 4/35
Software 3
OPC data server software
Time stamping system
Presentation
Routing function via
Quantum NOC control
head 140 NOC 78 100
or external router
Modicon
Quantum drops
Modicon
Quantum drops
Modicon
Quantum drops
OFS server
Vijeo Citect
alarm
terminal
Quantum CPU
Ethernet
Ethernet
BMX-CRA1
event
memory
BMX-CRA2
event
memory
BMX-CRA3
event
memory
BMX-ERT1
event
memory
BMX-ERT
event
memory
BMX-ERT
event
memory
Example of a Time stamping architecture
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