Chapter 6 FBD Block Diagram Programming 161
(4) Counter Mode 3(Fixed Count, Retentive)
Mode 3 Counter operation is similar to Mode 1 except its current count value is retentive when Counter powers down. So, the
current value won’t be init value when Counter powers up, but be the value when it powering down. Mode 3 Counter
will count up to a fixed preset value and stop counting at that value, or stop counting when its current value is 0 if it’s configured as
down counter.
FBD display Parameter display
Counting Input
→
Up/Down Counting
→ ←
Current value
Reset
→
←
Preset value
Counting Parameter
→
Note: The “PD” means the current value will be retain until the power recover；
This mode is similar to mode 1, but:
※ First 31 Counter functions (C01~C1F) can keep their current value after a loss of power to the smart relay.
※ The current counter value will keep when the smart switches between RUN and STOP if C-keep is active.
(5) Counter Mode 4(Continuous Count, Retentive)
Mode 4 Counter operation is similar to Mode 2 except its current count value is retentive. The current count value is
retentive and will keep its current count after a loss of power to the smart relay. Mode 4 Counter will count up to a fixed
preset value and then continue counting after the preset value, but it won’t count when the current value equals 0 if it’s
configured as down Counter.
FBD display Parameter display
Counting Input
→
Up/Down Counting
→
←
Current value
Reset
→ ←
Preset value
Counting Parameter
→
Note: The “>”means the current value appeared will be greater than present value;
The “PD” means the current value will be retain until the power recover；
This mode is similar to mode 2, but:
※ First 31 Counter functions (C01~C1F) can keep their current value after a loss of power to the smart relay.
※ The current counter value will be kept when the smart switches between RUN and STOP if “C-keep” is active.
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