Inout Switch

H. SOFTWARE INPUT/OUTPUT FUNCTIONS

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H SOFTWARE INPUT/OUTPUT FUNCTIONS The software input/output are virtual input/output that are processed by software in the FCS. The software input/output consist of:

internal switch used to change logical values between function blocks and other application functions, and message output used to communicate the occurrence of events.

The software inputs/outputs that can be referenced and set from the sequence control blocks are shown in the table below.


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H1 Identification of Software Input/Output Software inputs/outputs are identified by their element serial numbers. The classification of element numbers for the CS 3000 is shown below.

Software input/output element numbers of CS 3000 are shown in the table below.


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H2 Internal Switches The following internal switches are explained.

Common Switches Global Switches H2.1.1 Common Switches Common switches are internal switches used by various control functions to save the shared logical values in an FCS. The logical value of a common switch is not directly output to an external FCS, but are used by various control functions in an FCS for condition testing and status manipulation. Common switches with element number %SW0001 to %SW0200 are fixed as system switches. They are used to indicate the different statuses of the FCS.

Common switches in the CS 1000 with element number %SW0201 to %SW1000 may be freely defined by users.

Common switches in the CS 3000 with element number %SW0201 to %SW4000 may be freely defined by users. The data for common switches %SW0001 to %SW0007 that are used as the station start ID switches and %SW0031, which is used as an extension common switch in a PFCS/SFCS, are written by users. Common switches %SW0097 to %SW0200 are valid only when the extension common switch is set to 1 (valid). Only the data for common switches %SW0001 to %SW0007 that are used as station start ID switches in a CS 3000 LFCS and KFCS, are written by users. For more detailed information on System Common Switches, please refer to Field Control Station Basics (IM 33S01B30-01E) Page 152 - 160 onwards. H2.1.2 Condition Testing and Status Manipulation When common switch ON/OFF status is applied as a condition test signal to a sequence table block and logic chart block or to a designated function block in sequence connection via its signal input terminal, the testing of the condition establishment is referred to as common switch condition testing. The syntax form for condition testing is shown below.

When common switch ON/OFF status is applied as a manipulated signal from a sequence table block and logic chart block or from a designated function block in sequence connection via its signal output terminal, the common switch status reflecting the manipulated signal status is referred to as common switch status manipulation. Two types of manipulation signal outputs are available: a latched type and a non-latched type.

The syntax form for status manipulation is shown below.


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H2.2.1 Global Switches A global switch is an internal switch with the same logical value on all stations in the same domain. Global Switch is only applicable to CS 3000 System.

The defined value is broadcasted to each station in the system via V net scan transmission when data transfer to other stations is defined at Scan Transmission Definition on the FCS Constants Builder. When the values of global switches under the control of other stations are sent via scan transmission, the global switch on the present station is updated when data receipt is defined at Scan Transmission Definition on the FCS Constants Builder. The values of global switches are updated at the same time mostly on all stations in the system. The values are updated by 100 msec, which is fixed. Up to 256 write-enable global switches can be assigned to each station. To transfer/receive the values of global switches between stations, the scan transmission definitions on the FCS Constants Builder must be defined. H2.2.2 Condition Testing and Status Operation Condition testing for global switches is to test whether conditions are satisfied: The ON/OFF state or data status of global switches are tested as conditional signals of sequence table blocks and logic chart block or function blocks for which sequence connection is specified to its input terminals. The following formats must be used for condition testing for global switches:

Status operation for global switches is to change the ON/OFF state of global switches by action signals from sequence blocks and logic chart block or function blocks for which sequence connection is specified to its output terminals. Status operation is applicable to global switches of present station only. There are two output types of action signals for global switches: latched type and non-latched type. The following formats must be used for status operation of global switches:


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H3 Message Output Functions The contents of the following messages are user-defined and explained here.

Annunciator Messages Operator Guide Messages Printout Messages Sequence Message Request H3.1 Annunciator Messages These special message outputs are used to simulate the annunciator panels of the instrument panels. Unlike other message outputs, annunciator message outputs store alarm-occurrence statuses as logical values. When the alarm occurrence status changes, the annunciator message informs the HIS of the occurrence or recovery of the message. When an alarm occurs, the alarm symbol will flash to prompt the operator for acknowledgment. Annunciator message outputs are processed at the basic scan cycles only. H3.1.1 Condition Testing and Status Manipulation When annunciator message ON/OFF status is applied as a condition test signal to a sequence table block and logic chart block or to a designated function block in sequence connection via its signal input terminal, the testing of the condition establishment is referred to as annunciator message condition testing. The syntax form for condition testing is shown below.

When annunciator message ON/OFF status is applied as a manipulated signal from a sequence table block and logic chart block or from a designated function block in sequence connection via its signal output terminal, the annunciator message status reflecting the manipulated signal status is referred to as annunciator message status manipulation. Two types of condition signal outputs are available: a latched type and a non-latched type. The syntax form for status manipulation is shown below.

In the case of latched annunciator messages, recovery can be made by N-status manipulation of the sequence table. The following syntax form is for the recovery of an annunciator message output.

%ANnnnn.PV.H -----N


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H3.1.2 Annunciator Builder Annunciator Builder can be accessed from

System View, [FCS0101] [Message] double click on [AN0101].

Message Annunciator message is used to notify the operator of errors in the process. Up to 24 alphanumeric characters (12 double-byte characters) may be defined in The Annunciator Message Builder by user. The occurrence of annunciator messages is shown as below:

Tag Name A tag name can be assigned to each annunciator element number. A tag name defined here can be used in place of the annunciator element number (%AN000n) that has been assigned that tag name.


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Switch Position Label The switch position labels refer to character strings displayed as labels for switches. It can be selected from a list in data entry area.

Label Specify direct format or reverse format.

Level Select a security level from level 1 to 8.

Tag Mark Select a tag mark type from the following 8 types. This mark indicates the tag priority level of the displayed function block. The following are the available selections. The default setting is General.

Tag Importance

Important

General

Auxiliary 1

Auxiliary 2

Tag mark

Action type

1

5

2

6

3

7

4

8

Confirm

O

X

X

O

X

O

X

O

Data Entry Confirmation/Alarm Acknowledge

O : required X : Not required (automatic when status reverts to normal)


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Alarm Level The Alarm Processing is a message processing function performed by the HIS when alarm occurs during plant operation. Select an alarm processing level from [High ],[Medium ],[Low ],[Logging ],and alarm levels defined in the Alarm Processing Table Builder. Upper Wndow An upper window can be specified for each function block and connection I/O in the System Builders beforehand. The window name must be 16 uppercase alphanumeric characters. This setting is optional.

Help There are system-fixed help dialog and user-definable help dialog for defining help message. The setting is optional. The help message may be identified by assigning the help message number a unique ID. The help message number can be omitted. The entry format of the Help message number name is as follows:

Upper Equipment Name The upper equipment name refers to the name of the equipment object located in the next upper layer of an equipment object in a plant hierarchy. Specifying an upper equipment name via the Plant Hierarchy Builder determines the location of an equipment object in the plant hierarchy. Only custom equipment names can be specified as the upper equipment name.


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H3.2 Operator Guide Messages Operator guide message outputs alert the operator to the operator guide window in real-time situations. The syntax form for an operator-guide message output specification is shown below.

H3.2.1 Operator Guide Builder Operator Guide Builder can be accessed from

System View, [FCS0101] [Message] double click on [OG0101].

Message Define the character strings to transmit as an operator guide message. Up to 70 alphanumeric characters are used. The occurrence of operator guide messages is shown as below:


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Color Display color of character strings in operator guide messages (Default color: white (W))

Related Window Name Name of linked window With the related window defined,clicking the message displayed in the Operator Guide Message window will display the related window in the defined format. Label User-defined labels are names that can be defined for the analog process I/O and for messages. User-defined label may be defined up to 16 alphanumeric characters. The format for a user-defined label is given as below. Labels may be omitted.


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H3.3 Printout Messages Print messages are triggered by the Sequence Control Function to print out the message to indicate certain timing of the process. When a print message request is sent from a field control station to an HIS, the Operation and Monitoring Functions print the character string that corresponds to the message number, then saves the print message to the historical message log file. The syntax form for a print message output specification is shown below.

H3.3.1 Printout Builder Printout Builder can be accessed from

System View, [FCS0101] [Message] double click on [SD0101].


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Message Up to 80 alphanumeric characters (40 double-byte characters)may be defined as print message. When printing process data, the data may be indicated by symbol.The data values are printed in the order of data items (data1,data2,data3). The occurrence,transmission and output of print messages are shown as below:

Data1, Data2, Data3 Data may be defined in the format of TagName.DataItem. For array data,TagName.DataItem [subscript1,subscript2 ] may be specified. The data may be specified less than 34 alphanumeric characters.

Format1, Format2, Format3 Specify the format of the print message. Integer data value and the real number data value are right justified and the character strings are left justified when printed out. The print format is as follows: [Leading Zeros ] [Total Digits ].[Digits after DP ] [Conversion ] Label User-defined labels are names that can be defined for the analog process I/O and for messages. User-defined label may be defined up to 16 alphanumeric characters. The format for a user-defined label is given as below. Labels may be omitted.


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H3.4 Sequence Message Request The sequence message request is sent by the Process Sequence Control Function at a certain process timing to an HIS to execute certain Operation and Monitoring Functions. Sequence message requests enable the operator to start or run the HIS functions from an FCS. The syntax form for a sequence message request specification is shown below.

H3.4.1 Sequence Message Request Builder Printout Builder can be accessed from

System View, [HIS0164] [Configuration] double click on [MsgReqDef].

In the above example, the Process Alarm window displaying the process alarm generated at station 01 is called up as a medium-size window.

Function The following functions may be specified to a sequence message request.

Calling up windows Executing a program assigned to the function key Operation keyboard LED ON/OFF/flash Run a designated program Multimedia Calling up a panel set (*1) Printing reports


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The trigger of request messages is shown as below:

Station Name The sequence message request is managed in an HIS. Usually,ALL is specified in the station name item thus, the request received from all FCSs may be executed. If a station name is designated, only the request from the designated station is executed.


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H4 Message Types Each message has a number to identify the message type. The following messages have system-fixed identification numbers and contents.

System Alarm Messages Process Alarm Messages H4.1 System Alarm Messages System alarm messages notify the operator of the hardware errors in the control station or an HIS as well as errors in communication. Alarm messages are displayed in the System Alarm window. The trigger of system alarm messages is shown as below:


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H4.2 Process Alarm Messages Process alarm message is used to notify the status of a process alarm to the operator. The occurrence of a process alarm message is shown as below:

By designating priority for each function block, priority for each process alarm can be determined. The Operation and Monitoring executes the following alarm processing according to the alarm priority:


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Laboratory H Exercise Q1. What is the main difference between Process I/O and Software I/O? Q2. What is the function of a Software I/O switch? Q3. Name the 2 types of Software I/O switches. Q4. What is the difference between a Common Switch and a Global Switch? Q5. Describe the functions of the following message outputs:

Annunciator Messages Operator Guide Messages Printout Messages Sequence Message Request System Alarm Messages Process Alarm Messages

Q6. Which type of messages have repeated warning feature? Practice 1. Configure a user-defined common switch with the following display:


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2. Call up sequence block [MSG]. The annunciator messages, operator guide messages and printout messages are configured in this sequence table as outputs.

a) Start Test Function of [FCS0101] of project [TRAIN3] and call up tag b) In the MAN mode, adjust the MV value of FIC 200 to approximately 50. c) Adjust the LL of [FIC200] to 20 and PL to 25. d) Change the mode of [FIC200] to AUT. e) Bring the SV of [FIC200] to 24 i.e. below PL. f) Observe what happens when the PV drops below LO setting. g) Check to see if the message generated is correct.

From the above sequence block [MSG] , annunciator messages in figure 1, operator guide messages in figure 2 and printout messages in figure 3 will appear when the [FIC200] is in LO alarm.

Figure 1


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Figure 2

Figure 3

Before proceeding to the next chapter, resolve all alarms and change the mode of MSG to MAN.

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Inout Switch

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