CMPR - Special function blocks MiniSuper PLCs, mini-Relay intelligent controller

MiniSuperPLC programming Blocks
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Function CMPR ( Analog Comparator function )

Diagram	Pin	Description
Comparison Function may be selected as: “<”, “>”, “<=”, “>=”, “!=”, “=”	Input 1	Analog Input 1, can be selected as: the value calculated from the analog input IA through the math formula, or the preset analog value.
	Input 2	Analog Input 2, can be selected as: the value calculated from the analog input IA through the math formula, or the preset analog value.
	Output Q	If the comparing condition between Input 1 and Input 2 is YES, Q will be 1, and otherwise Q will be 0.
	Output P	If the property pin of the output P is connected with the properties pin of the SLCD, the parameter of this function block will be transferred to HMI.

Function Description:

Only for MiniSuperPLCs: 12MRDC, 12MTDC, 12MGDC, 22MRDC, 22MTDC, 22MGDC types have this function.

This function is used in the analogue input instructions.

Instruction of CMPR

The value of the analog input (IA), which the CMPR compares, is valued out through math formula and is not the actual input voltage value. And the math formula is A*IA+B.

Actually the value of A and B don’t need for you to calculate by pen. We have put the math formula into SWRT and the free software SUPER CAD. You only need to connect the sensor to the related analog input (IA) then the value of A and B will be written into SR PLC according to the related methods.

Here we explain the method in SUPER CAD:

Connect the MiniSuperPLC main PLC and your PC via SR-CP. Power on the SR main PLC and open the SUPER CAD software. Then select [Set Analog Parameters] in [Option] to select the two values of the linear relationship as in Fig. 3.2 and Fig. 3.3. (If the sensor tests the 0℃ first and then tests a 50℃. Through these tow times test, it will get the value of A and B. And then put the value of A and B into the main PLC.)

Please refer to the details of SWRT for the methods how to set the value of A and B in SWRT.

Notes: The value of A and B of each analog pin need to be set separately.

CMPR will compare the calculated value of the input 1 and input 2. When the comparison function is selected as “〈”, it means the calculated value of input 1 is smaller than that of input 2 and the output is high. Otherwise it will be low.

And the value of input 1 or input 2 can be select as the fix value, and the other is connected to the pin of the analog input. Thus CMPR will compare this fix value and the calculated value of the analog pin.

Example 1: Comparing the calculated value of input 1 and input 2.

Input 1 is connected to IA0;

Input 2 is connected to IA1;

Output is connected to QA1;

CMPR function is selected as “<=”

Then If the calculated value of IA0 is <= that of IA1, QA1 will become 1. Otherwise QA1 will become 0.

Example 2：Comparing the calculated value of the analog input with the fix value.

Input 1 is connected to IA01;

Input 2 is empty. And then select the property dialogue frame of Input 2 and put in the fix value;

Output is connected to QA0;

CMPR function is selected as “<=”.

Then if the calculated value of IA0 is <= to the fix value, QA1 will become 1. Otherwise QA1 will become 0.

MiniSuperPLC Special Function Menu

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