Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual KnX KnY KnM KnS T REFF, Reffp 3 steps

DVP - ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming

API Mnemonic Operands Function Controllers

51

REFF

P

Refresh and Filter Adjust

ES2/EX2

SS2

SA2

SX2

SE

Type

Bit Devices

Word devices

Program Steps

OP

X

Y

M

S

K

H KnX KnY KnM KnS T

C D

E

F REFF, REFFP: 3 steps

n

*

*

PULSE

16-bit

32-bit

ES2/EX2

SS2

SA2

SX2 ES2/EX2

SS2

SA2

SX2 ES2/EX2

SS2

SA2

SX2

SE

SE

SE

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.

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	K5
REFF
X0
Y1
X20
REFF	K20
X1
Y2
END

Points to note:

Response time is ignored (no delay) when input points are occupied by external interrupts, high-speed counters or SPD instruction.

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