Controls News 13
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Technology:
using SNMP in automation
The central SNMP manager enables IT managers to
monitor andmanage the devices (known as «agents»)
on the IP network. In the event of a fault, the agents
send trap messages (text messages) to the SNMP
manager. The manager can access the agents using
GET and SET commands and request further informa-
tion, set parameters or trigger actions.
An SNMP manager is comparable with a control
management system from the world of automation.
In systems that already have an SNMP manager, it is
therefore also expedient to monitor and manage the
automation devices in the same manner.
Saia®PCD with AutomationServer and SNMP
agent function
The AutomationServer of the Saia® PCD controllers
supports the SNMP agent function in versions V1 and
V2c. System statuses and data can be sent to one or
more SNMP managers via trap messages (text and
data). To this end, AWL commands and FUPLA Fboxes
are available in the Saia® PCD controllers.
The SNMP manager can access the media of a PCD
controller via GET and SET commands. The data
structures of the SNMP agents are defined in MIB
files (Management Information Base). The standard-
Saia® PCD MIB file provides access to all PCD media.
The Saia®MIB generator can be used to generate
application-specific MIB files that only provide the
selected PCD media with icon symbol names.
The AutomationServer in real-life use
The use of the AutomationServer with integrated
web server and SNMP agent has now become stand-
ard in projects with Saia® PCD controllers. The func-
tions are used for the different applications in innu-
merable projects
Below are two typical examples:
Energy data capture and monitoring
of a data processing centre at the company
Wusys in Frankfurt
The energy consumption of the server system is meas-
ured using Saia®Energymeters, recorded in the Saia®PCD
controllers via the S-Bus and transmitted toWusys opera-
tor platforms via SNMP. Further to the energy consump-
tion, the ambient conditions and data from the cooling
systems are also recorded and monitored by the PCD
controllers. This data is also transmitted to the operator
platform via the SNMP protocol. The system servicing
andmaintenance occurs is made using a standard browser
via the PCD controllers’integrated web server.
The benefits for the operator:
–
No additional control system is required for
energy management and system monitoring.
Thanks to the SNMP agent in the Automation-
Server, the existing operator operational platform
at Wusys can be simply sent all data without any
special hardware or software drivers.
–
Thanks to the integrated web server, the system
statuses for maintenance and servicing can also
be directly visualized on the Saia® PCD3 controller.
Again, no additional system is required.
More information about the project:
Wusysdataprocesscentretestimonial:webcodeen1392d
Wusys data process centre case study: web code en1392e
Wusys data process centre YouTube: web code en1392f
Server room in the
Wusys data process-
ing centre
Over 500 energy
meters and controllers
without a control
system
SNMP agent integrated into
every Saia®PCD controller
Network topology of the in-
frastructure of the Wusys data
processing centre in Frankfurt.
Thanks to Saia®PCD, only one
system is required for energy
data capture and monitoring
the server rooms. The Autom-
tionServer, together with the
web server and SNMP agent,
offers the open interface for
the Wusys operator platform
and saves costs on additional
hardware and software as well
as engineering services.
PCD3.M5540 (server room 1st floor)
PCD3.M5540 (server room 2nd floor)
Temperature/humidity
SNMP/FTP/HTTP
Fault message transmission con-
tact (Honeywell Winmag/GLT)
Fault message transmission con-
tact (Honeywell Winmag/GLT)
Energy busline 1
System distributor 1 + n
Service/maintenance
Web visualization
Operator platform
«
Wusys» (customer portal)
Energy busline 3
System distributor 1 + n
Energy busline 2
System distributor 1 + n
Energy busline 4
System distributor 1 + n
Energy (power feed)
Energy (power feed)
RLT
(
Hansa Neumann)
RLT
(
Hansa Neumann)
TCP/IP
Temperature/humidity
Internet
