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Part 18. Phần mềm SCADA Cimon Ultimate Access - Toán tử và Câu Lệnh
Part 18. Phần mềm SCADA Cimon Ultimate Access - Toán tử và Câu Lệnh
CIMON-SCADA cung cấp nhiều toán tử và hàm khác nhau. Các yếu tố này cho phép người dùng viết các biểu thức toán tử và biểu thức lệnh. Biểu thức thường được sử dụng như một câu lệnh để thực hiện một hành động tùy chọn và câu thay thế để gán giá trị cho một biến thẻ.
1 Features of Operation Expression
- Operation expression can be defined with a single or multiple declarative languages.
- Only one operation expression can be written in a single line.
- A short description starting with a semicolon(;) can be added to the end of the blank or declarative sentence.
- The brackets can be used to change the priority of the operation or clarify the formula.
- In case of the logical decisions, the ‘True’ represents the cases when the value is not 0. The ‘False’ represents the case when the value is 0. If the logical decision is made on the strings, the ‘Space’ represents the ‘False’. The other cases represent the ‘True’.
- The operation expression does not consider the upper/lower cases.
- (Except Strings)
2 Definitions
(1) Declarative Statements
Declarative statements are used to define the operation expression. There are three types of declarative statements; substitution sentence, command sentence and expression statements
| Type | Format |
| Substitution Sentence | Variable = Formula |
| Command Sentence | Subroutine |
| Expression Statement | ; All sentences after semicolon ‘; |
(2) Formula
CIMON-SCADA provides various types and formats of the formula such as constants, variables, functions etc. The formula and the operator are usually used as <Formula><Operator><Formula> format. The <Operator> excludes only ‘=’
| Type | Description | |
| Constant | Includes integer, real number, string and internal constant. | |
| Integer [Sign][Digit]Numeral |
Sign | +, - (Omitted sign represents +.) |
| Numeral | 0 1 2 3 4 5 6 7 8 9 A B C D E F | |
| Digit | Assign as 2 (Binary), 8 (Octal), 16#(Hexadecimal) format. Omitted digit represents decimal. | |
| Real Number Mantissa[Exponent] |
Mantissa Part | Assign as shown below. [Sign [Numbers].Numbers [Sign]Numbers.[Numbers] [Sign]Numbers |
| Exponent Part | Assign as shown below. E[Sign]Numbers e[Sign]Numbers |
|
| String | Assign as shown below. “ASCII Codes” |
|
| Internal Constant | There are 2 predefined internal constants in CIMON-SCADA as shown below. CONSTANT_P1: � (3.1415...) CONSTANT_EXP: e (2.7183…) |
|
| Variable | Tag | Tag The tag name defined in the database. |
| Tag Variable | The variable/constant related to the tags defined in the database. | |
| Internal variable | The internal variable defined in the CIMONSCADA | |
| Function | Function | A function for the arithmetic operation. |
| Subroutine | An internal command function of CIMONSCADA | |
| Operator | Followings are the operators provided by CIMON-SCADA. =, ~, !, +, -, *, /, %, |, ^, &&, <<, >>, ||, <, >, <=, >=, ==, != |
|
3 Tag Variable
The tag variable represents the variables or constants related to the tags defined in the database. The tag variables are used as shown below.
TagName:TagVariable
The list of tag variables is as shown below
| Tag Variable | Description | Read/Write |
| VALUE | Displays the current value of the tag. Operates same as the case when only the tag name is assigned. | R/W |
| NAME | Displays the name of the tag. (String) | R |
| DESC | Displays the description of the tag. (String) | R/W |
| TYPE | Displays the type of the tag. (String) Types: Group, Analog, Digital, String |
R |
| UNIT | Displays the unit of the analog tag. (String) | R/W |
| MIN | Displays the internal minimum value of the tag. | R/W |
| MAX | Displays the internal maximum value of the tag. | R/W |
| RAWMIN | Displays the site minimum value of the tag. | R/W |
| RAWMAX | Displays the site maximum value of the tag. | R/W |
| DEADBAND | Displays the deadband of the analog tag. | R/W |
| OFFLABEL | Displays the Off Label of the digital tag. (String) | R/W |
| ONLABEL | Displays the On Label of the digital tag. (String) | R/W |
| LABEL | Displays the label of the digital tag according to the current state. (String) |
R |
| ALARMTYPE | Displays the assigned alarm type. | R |
| INALARM1 | Displays the Alarm On Label of the digital tag. In case of Analog Tag: Displays HiHi Alarm, Major Dev, ROC Label. |
R/W |
| INALARM2 | Displays Hi Alarm, Minor Dev Label of the analog tag. | R/W |
| INALARM3 | Displays Lo Alarm Label of the analog tag. | R/W |
| INALARM4 | Displays LoLo Alarm Label of the analog tag. | R/W |
| OUTALARM | Displays Alarm Off Label. | R/W |
| ALARMHIHI | Displays the boundary value of HiHi alarm. | R/W |
| ALARMHI | Displays the boundary value of Hi alarm. | R/W |
| ALARMLO | Displays the boundary value of Lo alarm. | R/W |
| ALARMLOLO | Displays the boundary value of LoLo alarm. | R/W |
| ALARMTARGET | Displays the target value of the deviation alarm. | R/W |
| ALARMMAJOR | Displays the Major Dev of the deviation alarm. | R/W |
| ALARMMINOR | Displays the Minor Dev of the deviation alarm. | R/W |
| ALARMROC | Displays the ROC of ROC alarm. | R/W |
| ALARMACK | Displays the alarm acknowledgement state. | R/W |
| ALARMVALUE | Displays the tag value when the alarm state changes. | R |
| ALARMTIME | Displays the time when the alarm state changes. | R |
| ALARMLABEL | Displays the label according to the current alarm state. |
R |
| ALARMOCCTYPE |
Displays the following value according to the alarm type. 10 : Major Dev Alarm (Analog Tag) |
R |
| RAWVALUE | Displays the tag value of the Real/Analog tag in which the ‘Scale/Offset’ is not applied. If minimum/maximum value of the ‘Eng. Data’ is not assigned, the variable will display the same value as the actual tag value. |
R |
| TAGKIND | Displays the tag type. [Group(0)/Digital(1)/Analog(2)/String(3)] |
R |
| REALTAG | Displays the tag type; Real tag(1) or Virtual tag (0). | R |
| DEVICE | Displays the name of the I/O Device. (String) | R |
| ADDRESS | Displays the I/O Address. (String) | R |
| DATALOG | Displays if the tag is registered to the Data Logging. (1: Registered, 0: Not Registered) |
R |
| ALARMOCCTIME | Displays the time when the alarm occurred. | R |
| ALARMFREETIME | Displays the time when the alarm is cleared. | R |
| NAME2 | Displays the tag name without the group tag name. | R |
| ALARMENABLE | Displays if the tag alarm is enabled(1) or disabled (0). | R/W |
| ACKLABEL | Displays the alarm ACK Label. | R/W |
| HYSTERESIS | Displays the hysteresis of the alarm. | R/W |
4 Operator
The operator is a key element of the operation expressions. The system starts calculating from the operator with higher priority. If the priorities are same, the operators are calculated from left to right. Be aware of that the substitution operator “=” is calculated from right to left.
In case of the string calculation, the both sides must be composed of strings. You can use the operators such as =, +, <, >, ,+, >=, ==, != for the string calculation.
The result of the internal operations (except the string) is processed as 8 Byte Double
| Operator | Function | Example | Description |
| = | Substitution Operator |
TAG_A = 3 + 4 | Substitutes the result of ‘3+4’ (=7) to the TAG_A. |
| ~ | One’s Complement |
~TAG_A | When the TAG_A’s value is 00110101b, the result is 11001010b. |
| ! | Logical NOT | !TAG_A | If the TAG_A is 0, the result is 1. If the value is not 0, the result is 0. |
| + | Addition | TAG_A+4 "ABC" + "123" |
Represents the result of adding the TAG_A and 4. In case of the sum of two strings, it indicates the "ABC123". |
| - | Subtraction | TAG_A – 4 | Represents the result of subtracting 4 from the TAG_A. |
| * | Multiplication | TAG_A * 7 | Represents the result of multiplying TAG_A and 7. |
| / | Division | TAG_A / 7 | Represents the result of dividing TAG_A by 7. |
| % | Remainder | TAG_A % 7 | Represents the remainder of the TAG_A divided by 7. |
| & | Bitwise AND | TAG_A & 0101b |
If the TAG_A is 0011b, the result is 0001b. |
| | | Bitwise OR | TAG_A | 0101b | If the TAG_A is 0011b, the result is 0111b. |
| ^ | Bitwise XOR | TAG_A ^ 0101b | If the TAG_A is 0011b, the result is 0110b. |
| && | Logical AND | Formula1 && Formula2 | If both Formula 1 and 2 are true, the result is 1. In other cases, the result is 0. |
| || | Logical OR | Formula1 || Formula2 | If both Formula 1 and 2 are false, the result is 0. In other cases, the result is 1. |
| << | Shift to Left | TAG_A << 3 | Represents the bits of TAG_A which are shifted 3 bits to the left side. The right side of the bits are filled with 0. If TAG_A is 00110101b, the result is 10101000b. |
| >> | Shift to Right | TAG_A >> 3 | Represents the bits of TAG_A which are shifted 3 bits to the right side. The left side of the bits are filled with 0. If TAG_A is 00110101b, the result is 0000110b. |
| < | Less than | TAG_A < 7 | If the TAG_A is less than 7, the result is 1. If not, the result is 0. |
| > | Greater than | TAG_A > 7 | If the TAG_A is greater than 7, the result is 1. If not, the result is 0. |
| <= | Less than or Equal to |
TAG_A <= 7 | If the TAG_A is less than or equal to 7, the result is 1. If not, the result is 0. |
| >= | Greater than or Equal to |
TAG_A >= 7 | If the TAG_A is greater than or equal to 7, the result is 1. If not, the result is 0. |
| == | Equal to | TAG_A == 7 | If the TAG_A is 7, the result is 1. If not, the result is 0. |
| != | Not Equal to | TAG_A != 7 | If the TAG_A is not 7, the result is 1. If not, the result is 0 |
5 Subroutine
The subroutine is a function which executes a specified action on the occurrence of events, such as pressing the button or clicking the object.
The subroutine can be utilized in diverse functions of CimonD as follows; Script, touch feature of the object, action in the button object, hot-key, page open/close action, schedule action, and user LogIn/LogOut action.
To use several commands in a single action, you may write the subroutines in different lines as shown below.
If you wish to enter the commands in a single line, you may use two semicolons (;;) to distinguish the subroutines.
You can also use the subroutine in the CimonX. Select [Work] – [Command Window] – [Commands] to write the subroutines. Then press [Run] to execute the command.
You can also enter several commands using two semicolons (;;) to distinguish them.
6 Function
The function is used to display a value on the window or as a part of the decision making statements. Unlike the subroutines, the functions have return values in numbers or strings. Also, the functions cannot be used in the several lines.
The functions can be utilized in diverse functions of CimonD as follows; Script, Tag Name field of object control features (except trend, slider, EntryData), Cell data in the Report [Register Tag], subroutine, and parameter of the function.
You can also use the function in the CimonX. Select [Work] – [Command Window] – [Operations] to write the function. Then press [=] to execute the function. The return values will appear on the right side of the [=] button.
