2 Instruction Descriptions
2-66
NJ-series Instructions Reference Manual (W502)
The POUs that are given in the following table have upward or downward differentiation specifications.
When the master control is reset or the reset is cleared, the execution conditions for these POUs
change. That means that the upward or downward differentiation conditions for these POUs may be
met. If the upward or downward differentiation conditions are met, then the instructions are executed
accordingly. The operation of some typical instructions is described below.
z R_TRIG (Up)
When the master control is reset, the execution condition changes to FALSE. If the execution condi-
tion is TRUE when the master control reset is cleared, the input upward differentiation condition is
met and the instruction operates accordingly.
Operation of POUs with Input Upward Differentiation or Input
Downward Differentiation
Differentiation Instructions
Input upward differentiation • LD, LDN, AND, ANDN, OR, ORN, and OUT with upward differentiation spec-
ifications
• R_TRIG (Up)
• Functions with an @ input upward differentiation option
• Functions blocks (e.g., counter instructions) with input upward differentiation
specifications
Input downward differentiation • LD, LDN, AND, ANDN, OR, ORN, and OUT with downward differentiation
specifications
• F_TRIG (Down)
• Functions with a % input downward differentiation option
A
UINT#1
UINT#1
B
B
MC
In ENO
MCNo
MCR
EN ENO
MCNo
MC_ON
CTU
CU Q
Reset CV
PV
CTU_instance
MC_ON
A
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
Master control reset
Output from
LD instruction
A
B
UINT#1
UINT#1
MC
In ENO
MCNo
MCR
EN ENO
MCNo
MC_ON
A
B
MC_ON
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
TRUE
FALSE
Master control reset
Input upward differentiation condition met.
Output from
LD instruction
R_TRIG
R_TRIG_instance
Clk Q
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