Refresh And Filter Adjust - Delta DVP-ES2 Operation Manual

API Mnemonic
51 REFF P
Type Bit Devices
OP X Y M
n
Operands:
n: Response time (unit: ms)
Explanation:
1. PLC provides digital input filters to avoid interference. The response time (n) of X0 ~ X7 input
filters can be adjusted by REFF instruction. The instruction sets the value specified in n to
D1020 (X0 ~ X7 input filter time) directly. The instruction sets the value specified in n to D1021
(X10 ~ X17response time) for models including 28SS2 V3.42 /28SA2 V3.0 /26SE V2.0 and
later versions.
2. When PLC turns from OFF to ON or the END instruction is reached, the response time is
dictated by the value of D1020.
3. During program execution, the value in D1020 can be changed by using MOV instruction.
4. When using REFF instruction during program execution, the modified response time will be
move to D1020 and refreshed until next program scan..
5. Range of n: = K2 ~ K20.
Program Example:
1. When the power of PLC turns from OFF to ON, the response time of X0~X7 inputs is specified
by the value in D1020.
2. When X20 = ON, REFF K5 instruction is executed, response time changes to 5 ms and takes
affect the next scan.
3. When X20 = OFF, the REFF instruction will not be executed, the response time changes to
20ms and takes affect the next scan.
X20
REFF
X0
Y1
X20
REFF
X1
Y2
END
Points to note:
Response time is ignored (no delay) when input points are occupied by external interrupts,
Operands

Refresh and Filter Adjust

Word devices
S K H KnX KnY KnM KnS T C D E F REFF, REFFP: 3 steps
* *
PULSE
SA2
ES2/EX2 SS2 SX2 ES2/EX2 SS2
SE
K5
K20
Function
ES2/EX2 SS2
16-bit
SA2
SX2 ES2/EX2 SS2
SE
3 . I ns t r uc ti on Se t
Controllers
SA2
SX2
SE
Program Steps
32-bit
SA2
SX2
SE
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