User`s manual

Basics Features of the MELSEC System Q
2 – 4
Memory
In addition to the internal memory (RAM and FlashROM) all CPU types (except Q00(U)JCPU,
Q00(U)CPU and Q01(U)CPU) have an extension slot for a RAM or a ROM memory card. The
RAM card is protected against data loss with a battery. ROM memory cards are available with
capacities up to 32 Mbyte for permanent storage of programs and other data.
Programming
The instructions in MELSEC System Q for programming of the CPU are according IEC1131 and
there are additional MELSEC instructions depending on the programming tools.
Fast data transfer with programming devices
The connection of the programming device to the CPU module is done by USB interface except
the basic model CPUs Q00JCPU, Q00CPU and Q01CPU. The datatransfer speed is then
12 Mbps.
For the Q-CPUs the datatransfer speed via RS232 interface is 115.2 kBaud.
Mounting
The base unit can be mounted directly by screws or on a DIN rail by adapter. The small dimen-
sions of the modules of System Q allow, that the needed space for system mounting is reduced
by 60 % compared with the MELSEC AnS series.
Direct connection to the ETHERNET
The universal model PLC CPUs (modules with an "E" in the model name like Q10UDEHCPU)
are equipped with an ETHERNET interface allowing the direct connection of the PLC to the
ETHERNET network.
Compatibiliy
Concerning the general programming all the modules of MELSEC System Q are compatible to
the other Systems of the MELSEC PLC familiy. For information about programming of intelligent
function modules refer to the User's Manual of the module.