α
2
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
α
2
Series Controller
2.1.4
Function Blocks
Programming the
α
2 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
α
2 Series. The “ON” signal acts as a
pulse output and then turns “OFF”.
M09
“OFF” when Stop mode turns to Run mode in the
α
2 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
α
2 series controller is accessed via GSM
