Programmable Controllers MELSEC-A Series

Renewal

Controladores programables MELSEC

Replace with the Q Series CPU module while keeping the existing modules

Upgrade example

QA Extension Base Unit (QA1S51B)

Supported series:

Replace the AnS/QnAS Series CPU with the Q Series CPU while keeping the existing AnS/QnAS Series modules

Gradual transition from the AnS/QnAS Series to the Q Series (Q mode)

Construct a system that is controlled by the new Q Series CPU (Q mode) while keeping the existing AnS/QnAS Series modules installed to a QA1S□B extension base unit. The AnS/QnAS Series modules can gradually be replaced to comprise a Q Series-only system at the end.
The QA1S□B extension base units are compatible with the Universal model QCPUs^*1 (including the High-speed Universal model QCPUs). Process CPUs, redundant CPUs, Safety CPUs and remote I/O Stations are not compatible.
Some modules are not installable on the QA1S□B extension base unit. For details, please refer to the "QCPU User's Manual (Hardware Design, Maintenance and Inspection) (SH(NA)-080473ENG)".
No further extensions can be made to QA1S51B because QA1S51B is not equipped with an extension cable connector.

*1.The Universal model QCPU of which first 5-digit serial number is 13102 or later, is compatible with the base units.

Reduce conversion effort by using the same I/O addresses

When utilizing existing modules with a Q Series CPU, it is not required to change the I/O number of the existing modules. For new module(s) on the main base unit, assign a subsequent number, which comes after the existing module numbers in the I/O assignment settings. This can greatly reduce the program modification time.

Note:Assign the I/O numbers in the following order: Q Series to AnS/QnAS Series or AnS/QnAS Series to Q Series.
When the order is mixed (i.e., Q Series → AnS/QnAS Series → Q Series), an error will occur in the CPU.

Example of I/O assignment

		Modelo	Tipo	Point	Address
Main base unidad	0	QJ61BT11N	Inteligente	32	100
	1	QJ71LP21-25	Inteligente	32	120
	2	QX41	Entrada	32	140
	3	QX41	Entrada	32	160
	4	QY41P	Salida	32	180

		Modelo	Tipo	Point	Address
Extensión base unidad	5	A1SX41	Entrada	32	00
	6	A1SY41P	Salida	32	20
	7	-	Empty	32	40
	8	-	Empty	32	60
	9	A1SX41	Entrada	32	80

Renewal

QA Extension Base Unit (QA1S51B)

Gradual transition from the AnS/QnAS Series to the Q Series (Q mode)

Reduce conversion effort by using the same I/O addresses

Example of I/O assignment

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