PCC-IV Instruction Manual (Rev. 0.1)
Page 6-44
Section 6
– Blockware Functions
Technical Reference
F111 [NOT] NOT Logic
Function
NOT
logically inverts (i.e. negates) the Block Input.
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NAME: NOT SINGLE USE FUNCTION: N OUTPUT TYPE: D
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Input Type Description Notes
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1 D INPUT BLOCK
No Parameters
F112 [F/F] Flip Flop Logic
Function
F/F
behaves like a Latch relay. The Block Output remains at its last value (1 or 0) unless one of the three
Inputs is activated. The Block Output behaves per the table below:
Parameter 1
Inverted Output
Set
Reset
Toggle
Output
0 = No
1
0
X
1
0 = No
0
1
X
0
1 = Yes
1
0
X
0
1 = Yes
0
1
X
1
X
1
1
X
No change, same value from previous scan
X
0
0
^1
Opposite the Output value from the previous
scan. 0 becomes 1, 1 becomes 0
X
0
0
0, 1, or
1 -> 0
No change, same value from previous scan
X means: not used, can be any value
^1 means: on the rising edge (i.e., only once during the scan that
the Input changes from 0 to 1)
The Set and Reset Inputs have priority over the Toggle Input; that is, the Toggle Input is ignored unless both the
Set and Reset Inputs = 0. When Set = Reset = 1, the Block Output does not change, and the Toggle Input is ignored.
The Toggle Input is only active for the single scan after the Toggle Input changes from 0 to 1, and Set = Reset = 0.
At power down, the
F/F
Block Output is saved in the Retentive Memory area of the NVRAM. During the first scan
after CPU start-up, the
F/F
Block Output is set per
Parameter 2. “LAST” means: use the value saved in Retentive
Memory.
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NAME: F/F SINGLE USE FUNCTION: N OUTPUT TYPE: D
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Input Type Description Notes
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1 D SET INPUT
2 D TOGGLE INPUT
3 D RESET INPUT
Parameter Description Default Max Min Code Notes
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1 INVERT OUTPUT 0=NO 1=YES 0 1 0 2
2 POWER UP 1=HI 2=LO 3=LAST 3 3 1 2
