Mitsubishi AL2 Series User Manual

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α2

Simple Application Controllers

Function Block Programming 2

2 - 3

2.1.3 System Memory Bits

These System Memory Bits can provide predefined signals - Always On, Always Off, 0.5

second On, 0.5 second Off, or provide information about the Real Time Clock time or errors

etc. There are fourteen Memory bits that are referenced to M01, M02, ... M14.

Table 2.3: System Bits for the

α2 Series Controller

2.1.4 Function Blocks

Programming the α2 Series Controller is based upon the combination of different function

blocks. They process the information received from the previously mentioned inputs and

control the system Outputs. They can also provide input signals or information to other

function blocks using word outputs pins. To make programming easier, the Function Blocks

have all been preprogrammed. Therefore, parameters within each function block dialog box

can be set according to the intended application. There are 38 Function Blocks available, they

are described in detail throughout Chapters 5 and 6.

System Bit Description

M01 Always “ON”.

M02 Always “OFF”.

M03 Alternate - 0.5 seconds “ON”, 0.5 seconds “OFF”.

M04 “ON” when Real Time Clock data error occurs.

M05 “ON” when Summer time schedule is activated.

M06 “ON” when AS-interface communication Error occurs.

M07 “ON” when communication Error caused by AS-interface power failure occurs.

M08

“ON” when Stop mode turns to Run mode in the α2 Series. The “ON” signal acts as a

pulse output and then turns “OFF”.

M09

“OFF” when Stop mode turns to Run mode in the α2 Series. The “OFF” signal acts as

a pulse output and then turns “ON”.

M10 Reserved

M11 Reserved

M12 “ON” when CD (DCD) signal is turned ON (receiving CD signal from the modem.)

M13 “ON” when it is possible to access the GSM network.

M14 “ON” when the α2 series controller is accessed via GSM

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Mitsubishi AL2 Series Specifications

General

Model	AL2 Series
Digital Inputs	Yes
Digital Outputs	Yes
Type	PLC
Manufacturer	Mitsubishi
Input Voltage	100 to 240 VAC or 24 VDC (depending on model)
Output Voltage	24V DC
Number of Inputs	8 to 64 (depending on model)
Number of Outputs	6 to 64 (depending on model)
Programming Language	Ladder Diagram
Communication Ports	RS-232, RS-485, Ethernet (depending on model)
Operating Temperature	0 to +55°C
Storage Temperature	-20°C to 70°C
Humidity	10% to 90% (non-condensing)
Weight	Varies depending on the model