Panasonic FP Series User Manual

Arithmetic instructions
443
Part III FP Instructions
For Relay T/C Register Constant
s1, s2, s3 DWX DWY DWR DWL DSV DEV DDT DLD DFL dec. or hex.
d - DWY DWR DWL DSV DEV DDT DLD DFL -
No. IEC address Set If
R900B %MX0.900.11 for an instant  the calculation results in an overflow or
an underflow of output d.
R9009 %MX0.900.9 for an instant  the input value s3 is 0.
In this example, the input variable input_value is declared. However, you can write a constant
directly at the input contact of the function instead.
Operands
Error flags
Example
In this example, the same POU header is used for all programming languages. For an example
using IL (instruction list), please refer to the online help.
POU header
All input and output variables used for programming this function have been declared in the POU
header.
Body
When the variable start is set to TRUE, the function is carried out. It adds the corresponding
positive offset value = 2 to the positive input value = 18. The constants 5 (negative offset) and 2
(positive offset) are assigned to inputs s1 and s2 respectively. However, you can declare variables
in the POU header and write them in the function in the body at the inputs.
LD
ST
IF start THEN
F290_DZONE( s1_NegBias:= 5,
s2_PosBias:= 2,
s3_In:= input_value,
d=> output_value);
END_IF; (*5=neg. offset, 2=pos. offset *)

Panasonic FP Series Specifications

General

Mounting	DIN rail
Type	PLC
Communication Interface	RS-232, RS-485, Ethernet (depending on model)
Input Voltage	100-240V AC or 24V DC (depending on model)
Output Type	Relay, Transistor
I/O Points	Varies by model
Operating Temperature	0°C to 55°C
Dimensions	Varies by model
Weight	Varies by model