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System Memory Bits; Function Blocks - Mitsubishi Electric a2 Series Programming Manual

Simple application controllers
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α
2 Simple Application Controllers
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 24 Memory bits that are referenced as M01, M02, ... M24.
Table 2.3: System Bits for the
System Bit
M01
M02
M03
M04
M05
M06
M07
M08
M09
M10
M11
M12
M13
M14
M15
M16
M17
M18
M19
M20
M21
M22
M23
M24
2.1.4

Function Blocks

Programming the
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. However, parameters within each function block dialog box can be set
according to the intended application. There are 40 Function Blocks available, they are
described in detail throughout Chapters 5 and 6.
α
2 Series Controller
Always "ON".
Always "OFF".
Alternate - 0.5 seconds "ON", 0.5 seconds "OFF".
"ON" when Real Time Clock data error occurs.
"ON" when Summer time schedule is activated.
"ON" when AS-interface communication Error occurs.
"ON" when communication Error caused by AS-interface power failure occurs.
Pulses "ON" when Stop mode turns to Run mode in the
Pulses "OFF" when Stop mode turns to Run mode in the
"ON" during DCF77 decoding
Pulses "ON" when DCF77 finishes decoding without an error
"ON" when CD (DCD) signal is turned ON (receiving CD signal from the modem.)
"ON" when it is possible to access the GSM network.
"ON" when the α2 series controller is accessed via GSM
"ON" when DCF77 finishes decoding with an error
"ON" when external power for the 2DA board is on
"ON" when there is a sensor defect at I01
"ON" when there is a sensor defect at I02
"ON" when there is a sensor defect at I03
"ON" when there is a sensor defect at I04
"ON" when there is a sensor defect at I05
"ON" when there is a sensor defect at I06
"ON" when there is a sensor defect at I07
"ON" when there is a sensor defect at I08
α
2 Series Controller is based upon the combination of different function
Function Block Programming 2
Description
α
2 Series.
α
2 Series.
2 - 3

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