Siemens SIMATIC PCS 7 사용자 설명서
Monitoring and diagnostics
16
Monitoring and diagnostics for process instrumentation and process analytics
Standardized and meaningful diagnostics alarms are a
part of the electrical device description (EDD). SIMATIC
PCS 7 utilizes the EDD and forwards the relevant message
automatically to the Maintenance Station. The user recei-
ves information not only about which problem is involved
but also on how to resolve it.
part of the electrical device description (EDD). SIMATIC
PCS 7 utilizes the EDD and forwards the relevant message
automatically to the Maintenance Station. The user recei-
ves information not only about which problem is involved
but also on how to resolve it.
The PROFIBUS profile specification 3.01 supplies an upgrade
of the status byte, now designated "Condensed Status". The
purpose of the "Condensed Status" is to reduce the number of
alarms and make them more user-friendly. In addition, users
have the opportunity of changing the priority level for each di-
agnostic alarm and thus define what is relevant to their own
process.
of the status byte, now designated "Condensed Status". The
purpose of the "Condensed Status" is to reduce the number of
alarms and make them more user-friendly. In addition, users
have the opportunity of changing the priority level for each di-
agnostic alarm and thus define what is relevant to their own
process.
Numerous EDDs are currently being upgraded to Enhanced
EDDs. They have the following advantages:
• New standardized "look & feel" for all Siemens devices
• Quick start wizards for faster commissioning
• Improved representation of graphics for advanced diag-
EDDs. They have the following advantages:
• New standardized "look & feel" for all Siemens devices
• Quick start wizards for faster commissioning
• Improved representation of graphics for advanced diag-
nostic functions
All of these functions help to reduce the maintenance costs by
accelerating the diagnostic process.
accelerating the diagnostic process.
When using PROFIBUS, Asset Management functions can be
used to greatest effect if the devices used conform to the
PROFIBUS "Identification and Maintenance" specification as
well as profile specification Version 3.01. Siemens devices
conform to these standards and the following information is
made available:
• Manufacturer
• Order numbers
• Description
• Installation date
• Serial number
• Hardware and software modifications
used to greatest effect if the devices used conform to the
PROFIBUS "Identification and Maintenance" specification as
well as profile specification Version 3.01. Siemens devices
conform to these standards and the following information is
made available:
• Manufacturer
• Order numbers
• Description
• Installation date
• Serial number
• Hardware and software modifications
This information is read directly from the measuring instru-
ment and stored in the SIMATIC PDM. Here, the data can easily
be recalled.
ment and stored in the SIMATIC PDM. Here, the data can easily
be recalled.
Temperature measurement
SITRANS T are the temperature measuring instruments for
process engineering plants. They support commissioning and
maintenance in an optimum manner and can be used in diffe-
rent designs, such as complete measuring point, head-moun-
ted transmitter, DIN rail mounted or distributed device.For
preventive maintenance, for example, the following functions
are available:
• Universal connection of resistance thermometers, thermoele-
process engineering plants. They support commissioning and
maintenance in an optimum manner and can be used in diffe-
rent designs, such as complete measuring point, head-moun-
ted transmitter, DIN rail mounted or distributed device.For
preventive maintenance, for example, the following functions
are available:
• Universal connection of resistance thermometers, thermoele-
ments, resistance-type transmitters and DC voltage signals
• Monitoring of the measuring point for short circuit and
open circuit
• Min/max pointer for monitoring the electronics and sensor
temperature
The following devices are available as head-mounted trans-
mitters or integrated into a complete measuring point:
mitters or integrated into a complete measuring point:
SITRANS TH300 – the HART device
The operating hours counter evaluates the temperature valu-
es of the sensor and electronics, edits them and displays them
in eight temperature classes. The measured values can be ar-
chived. The sensor temperature can indicate aging processes
and can be used for anticipatory maintenance. The output
current is monitored cyclically, simulated as a fixed value or
ramp function:
• Memory function of RAM, ROM, EPROM according to
es of the sensor and electronics, edits them and displays them
in eight temperature classes. The measured values can be ar-
chived. The sensor temperature can indicate aging processes
and can be used for anticipatory maintenance. The output
current is monitored cyclically, simulated as a fixed value or
ramp function:
• Memory function of RAM, ROM, EPROM according to
checksum method
• Program sequence due to targeted approach to check-
points (watchdog)
SITRANS TH400 for PROFIBUS PA
Possibility of connecting two sensors in redundant mode. The
profile 3.0 device ensures easy interchangeability. With FISCO
certification, use in potentially explosive areas is uncomplica-
ted.
profile 3.0 device ensures easy interchangeability. With FISCO
certification, use in potentially explosive areas is uncomplica-
ted.
SITRANS TW for rail mounting
For installation on mounting rail with integrated power sup-
ply, SITRANS TW is a universal 4-wire temperature transmitter
for mounting in control cabinets:
• Monitoring of limit values and output via HART or signaling
ply, SITRANS TW is a universal 4-wire temperature transmitter
for mounting in control cabinets:
• Monitoring of limit values and output via HART or signaling
relay
• Runtime meter for electronics
SITRANS TH400
SITRANS TW
Maintenance_PA_04_2010_en.book Seite 16 Dienstag, 6. September 2011 9:45 09
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