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PLC>>>MELSEC System QnU |
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QnU - The next level in Q performance
Note: These new PLCs are only supported
by the GX Developer -programming package (officially from version
8.48A).
Support for GX IEC Developer will be
released with version 7.03 in November 2008.
Differences between the new models in speed and memory capacity.
Easy to connect to programming tool
via Ethernet
IP address setting is not required to connect GX Developer
(programming tool) to the CPU module directly (one-to-one
connection). Also, the CPU module allows the use of either straight
or cross cable. Ethernet thus realizes easy communication with the
CPU module like USB connection, even operators who are not familiar
with the network can easily connect it.
Search and display a list of
connected CPUs
Using an Ethernet hub, GX Developer can be simultaneously connected
to multiple CPUs.
The connected CPUs on the network can be searched and displayed in a
list. By selecting a CPU from the list, it is connected easily even
if the IP address is unknown, and the operating status can be
checked.
Connect to various devices according
to applications
High-speed communication with external devices is available via
Ethernet.
According to application requirements, various devices can be
connected.
Improved production time and processing
accuracy
To correspond with increasing demands for shortening production time of
large-scale, complex systems, the new model offers the fastest basic
operation performance* on the market: basic operation processing speed
(LD) of 9.5 ns. This means scan time is reduced, improving production
time and processing accuracy. In addition, the programmable controller
can realize high-speed control which was previously supported by micro
computer boards only.
*As of January 2008
High-speed, high-precision real data
processing
Floating point addition instruction processing speed is greatly
increased to 0.057 ms to support high-speed, high-precision operation
processing of various production data. Also, double precision operation
is added to reduce calculation errors when implementing complex
equations.
High-speed sequence data processing
Programming by index is necessary to perform operation of structured
(sequence) data efficiently. Index register processing speed is
dramatically reduced, which can shorten scan time when indexing is
heavily used for sequence programs such as FOR to NEXT
instruction.
High-speed, high-accuracy
machine control
By synchronizing a sequence program and high-speed communication
between multiple CPUs (operation cycle of 0.88 ms), faster
machine control is realized. Performance of motion control is
two times faster than the previous model.
Programs structured into individual
routines
The number of programs is increased to 124 (max.) to allow detailed
program management by product, process, etc. This facilitates
structuring programs into individual routines. Also, standard ROM
capacity is expanded to 4 MB (max.), enabling storage of label
information of function block (FB) and device comments of sequence
programs in CPU.
Easy to handle large-volume data
The capacity of standard RAM and memory card, which can be used as
file register, is increased to store larger amounts of production
and quality data. With an 8 MB SRAM, a maximum of 4086 k words
(about 4 times more than the previous model) can be used for file
registers. Furthermore, because the index register is expanded to 32
bits, programming beyond 32 k words is possible, enabling use of the
entire area of file register for indexing.
Highly compatible with standard Q Series
The standard Q Series modules can be used without modification. Common
modules can be used for the existing system and new system, lowering
maintenance costs.
Secures data even after prolonged
storage
Program and parameter files are automatically saved in the Flash
ROM, which does not require battery backup. This prevents data loss
due to dead battery. This function improves battery life. Important
information such as device data are also protected in case of dead
battery. The data will be backed up in standard ROM, and the backup
data automatically returns when power is turned ON.
Simplified program transfer
using just a memory card
Program modification of devices at the remote locations is
simplified. Just install a memory card with programs and
parameters into the CPU to transfer data. No programming tool
(PC) is required. Modification time is reduced drastically.
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