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Simple Application Controllers
Function Blocks 6
6 - 57
6.27 Shift Block
The function block uses a shift input signal in correlation with an input signal to set the output
ON. The function block can also Set or Reset the status of the output from the dedicated input
pins. The Shift Function block has an inbuilt retentive mode that retains the state of the output
upon the power resetting.
Table 6.27: Shift Function Bloc
k
1 ) Shift Operation
Function
Set Item
Description
I
Input pin for shift operation function block.
T
Shift input pin for shift operation function block
S
Set pin for the shift operation function block
R
Reset pin for the shift operation function block
FB
This function is used to transfer the Shift Input status just before the
Input signal is set ON.
Output
1) The output signal will be set to the Input signal status just before
the Shift input signal is set ON Before one scan the status will be
retained.
2) If the Set signal is set ON, the Output signal will be set ON.
3) If the Reset signal is set ON, the Output signal will be reset to OFF.
4) Once both the Set and Reset signals have been set ON
simultaneously, the Set operation will take precedence over the Reset
operation (Set operation has high priority),i.e. Set > Reset > Shift.
0 0
0
I
T
S
O
T
S
R
F
P
Shift pin
Output pin
ON
ON
ON ON
ON
ON
ON ON
ON
Power supply
(Run mode/
Stop mode)
Set pin
Reset pin
ON(Run mode)
OFF
(Stop mode)
