α Series Simple Application Controllers Function Block Diagram (FBD) Programming 6
Table 6.7: |
Function Blocks |
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Function Block |
Description |
α |
α2 |
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Name |
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Symbol |
Series |
Series |
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Delayed |
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DAL |
After a delay time, output alternates |
- |
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Alternate |
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turning ON or OFF with each input pulse |
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Analog Output |
AO |
Output analog value to specified |
- |
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channel on the installed AL2-2DA. |
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PID |
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PID |
PID control |
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Control which Display screen appears |
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on the LCD. This function block can only |
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Control |
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be set by “Display Manager” in the AL- |
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CDP |
PCS/WIN-E software. |
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Display |
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When control bit N04 is ON in α2 |
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series, it possible to control the |
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displayed User Screen. |
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This CONNECT function block is an |
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internal FB used to show the memory |
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used by the system bits, the bits for AS- |
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interface, and the operation keys. No |
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Connect |
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_B |
function block appears on screen or |
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shows as being used in the “Memory |
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Configuration Usage” dialog box, the |
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purpose is only to calculate the memory |
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that is used by the bits listed above. |
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*1 When adding check mark on “Remember Output Signal after a Power Cut” check box, this icon is “Retentive Set/Reset (RSR)” in α2 series.
Latch a relay in SET or RESET position, gives Set or Reset priority. The last output status is kept when the power supply is cycled “OFF” and “ON”. However, last output status is lost when the α2 series is placed in the Stop mode.
*2 When adding check mark on “Remember Output Signal after a Power Cut” check box, this icon is “Retentive Alternate (RAL)” in α2 series.
Output alternates turning “ON” or “OFF” with each input pulse. The last output status is kept when the power supply is cycled “OFF” and “ON”.However, last output status is lost when the α2 series is placed in the Stop mode.
*3 When adding check mark on “Maintenance” check box, this icon is “Time Switch Maintenance (TSm)”. Use the RTC to turn output ON/OFF; Calendar or weekly schedule The schedule can be changed with “Setup TS” in the Top menu.
6.2.9User Function Blocks
This user function block is registered function block created by the customers. The user function block can be composed from the Input pin(s), the output pin(s), the sub FBD base, system bits, control bits, logic function blocks, function blocks, and user function blocks. For registering the user function block, refer to section 6.7.
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