Tristationz组态模块

TriStation 1131 Turbomachinery Control SoftwareCommon Functions LibraryCMN410.LT2Document No.: CMN410.LT2January, 2005Webster, TexasContents ii ContentsContents (ii)ILLUSTRATIONS (II)Common Functions (Library CMN410.LT2) (1)AVERAGE - FUNCTION (1)A_ALARM_1_02 - FUNCTION BLOCK (2)A_ALARM_2_03 - FUNCTION BLOCK (3)A_ALARM_3 - FUNCTION BLOCK (4)A_ALARM_4 - FUNCTION BLOCK (5)A_TRIP_1_03 - FUNCTION BLOCK (6)A_TRIP_2 - FUNCTION BLOCK (7)D_ALARM_1_02 - FUNCTION BLOCK (8)D_ALARM_2_02 - FUNCTION BLOCK (9)D_ALARM_3 - FUNCTION BLOCK (10)D_TRIP_1_03 - FUNCTION BLOCK (11)D_TRIP_2 - FUNCTION BLOCK (12)DIG_IN - FUNCTION (13)HISEL - FUNCTION BLOCK (14)LINIT11_03 - FUNCTION (16)LINIT6_03 - FUNCTION (18)LOSEL - FUNCTION BLOCK (20)MEDSEL2 - FUNCTION BLOCK (22)PID_SCALE - FUNCTION (26)RATEOFCHG - FUNCTION BLOCK (27)WATCHDOG - FUNCTION BLOCK (28)APPENDIX A: INVENSYS SYSTEMS INC. / TRICONEX TMC LIBRARIES SOFTWARE SITE LICENSE AGREEMENT (29)IllustrationsFigure 1. LINIT11 Function Temp Vs. Speed Example (16)Figure 2. LINIT6 Function Temp Vs. Speed Example (18)Common Functions (Library CMN410.LT2) AVERAGE - FunctionPurposeThis function averages up to 12 inputs which are enabled and within an acceptable range. It will leave out the highest and lowest value if desired.DescriptionTwelve values (IN01 – IN12) are inputs to this module. Each has a corresponding Enable flag(IN01OK – IN12OK). The enable flags are TRUE when the corresponding values are to be averaged. There is a low acceptable limit called MINVAL and a high acceptable limit called MAXVAL. The enabled inputs must be inside the acceptable range to be averaged. There is a Hi/Low rejection flag called DONTUSEH_L. If this flag is TRUE, the highest and lowest values will be eliminated from the average. If there are no good inputs, a “0.0” will be returned by the function.Variable Type Parameter Type DescriptionINPUT IN01 REAL Input # 1IN02 REAL Input # 2IN03 REAL Input # 3IN04 REAL Input # 4IN05 REAL Input # 5IN06 REAL Input # 6IN07 REAL Input # 7IN08 REAL Input # 8IN09 REAL Input # 9IN10 REAL Input # 10IN11 REAL Input # 11IN12 REAL Input # 12DONTUSEH_L BOOL Eliminate High and LowAcceptableValueMinimumMINVAL REALAcceptableValueMaximumMAXVAL REALenablesIN01TRUEIN01OK BOOLenablesIN02TRUEIN02OK BOOLIN03enablesTRUEIN03OK BOOLenablesIN04TRUEIN04OK BOOLenablesIN05TRUEIN05OK BOOLenablesIN06TRUEIN06OK BOOLenablesIN07TRUEIN07OK BOOLenablesIN08TRUEIN08OK BOOLenablesIN09TRUEIN09OK BOOLenablesIN10TRUEIN10OK BOOLIN11enablesIN11OK BOOLTRUEIN12enablesIN12OK BOOLTRUEValueOUTPUT AVERAGE REAL AveragePurposeThis module generates analog alarms. It is active between two startup modes.DescriptionAn analog or real value may be tested against an alarm setpoint with this function block. The inputs consist of the measurement, the setpoint, a high or low alarm flag, a time delay, startup mode, mode alarm testing limits, and acknowledge flag. The output is the alarm status. The input / output consists of the horn.First the module compares the startup mode with the mode alarm testing limits. If the mode is outside the limits, the alarm status is cleared and the delay timer is set to zero. Otherwise, thesetpoint is compared to the measurement, based on the high or low flag. If an alarm condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the alarm status becomes TRUE and the HORN also becomes true. The alarm status will remain true as long as the condition exists. The HORN only becomes true on the alarm transition. There is a dead band around the setpoint for clearing the alarm.If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type DescriptionINPUTMeas REAL Measurement TestedSetpoint REAL Alarm SetpointHigh_Test BOOL TRUE if Alarm when Meas >= Setpoint FALSE if Alarm when Meas <= SetpointiMODE DINT Startup Sequence ModeLow_Mode DINT Alarm is tested at or above this mode.High_Mode DINT Alarm is tested at or below this mode.TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output. deltaT REAL Scan Time. Normally in seconds. This variable must have the same units as the TimeDelay variable.fACK BOOL Acknowledge InputDeadband REAL Clear Deadband OUTPUTAlarm BOOL Alarm Output IN/OUT Horn BOOL Horn OutputPurposeThis module generates analog alarms based on an integer reduction. It was written to generate an alarm if the number of exhaust thermocouples drops, indicating a thermocouple failure. The alarm condition will remain until the acknowledge button is pressed.DescriptionAn integer is tested against its previous value with this function block. The inputs consist of theinteger, a high or low alarm flag, startup mode, mode alarm testing limits, and acknowledge flag. The output is the alarm status. The input / output consists of the horn.First the module compares the startup mode with the mode alarm testing limits. If the mode isoutside the limits, the alarm status is cleared and the delay timer is set to zero. Otherwise, the integer is compared with its history, based on the high or low flag. If an alarm condition exists, the alarm status becomes TRUE and the HORN also becomes true. The alarm status will remain true as long until acknowledge is pressed. The HORN only becomes true on the alarm transition.If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type Description INPUTMeas DINT Integer TestedHigh_Test BOOL TRUE if Alarm when Integer > History FALSE if Alarm when Integer < HistoryiMODE DINT Startup Sequence ModeLow_Mode DINT Alarm is tested at or above this mode.High_Mode DINT Alarm is tested at or below this mode.deltaT REAL Scan Time. Normally in seconds.fACK BOOL Acknowledge Input OUTPUTAlarm BOOL Alarm Output IN/OUT Horn BOOL Horn OutputPurposeThis module generates analog alarms. It becomes active when two Boolean flags are TRUE. DescriptionAn analog or real value may be tested against an alarm setpoint with this function block. The inputs consist of the measurement, the setpoint, a high or low alarm flag, a time delay, an enable time delay, two flags which activate the module, acknowledge flag, and a clear deadband. The output is the alarm status. The input / output consists of the horn.First the module checks the two activation flags. Both must be TRUE to activate the module. If the flags are not TRUE, the alarm status is cleared and the delay timers are set to zero. If the flags are TRUE, an activation timer is tested. After this timer has expired, the alarm logic is commissioned. The setpoint is compared to the measurement, based on the high or low flag. If an alarm condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the alarm status becomes TRUE and the HORN also becomes true. The alarm status will remain true as long as the condition exists. The HORN only becomes true on the alarm transition. There is a dead band around the setpoint for clearing the alarm.If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type DescriptionINPUTMeas REAL Measurement TestedSetpoint REAL Alarm SetpointHigh_Test BOOL TRUE if Alarm when Meas >= Setpoint FALSE if Alarm when Meas <= SetpointFlag1 BOOL Alarm activation flag 1. Must be TRUE to activate the module.Flag2 BOOL Alarm activation flag 2. Must be TRUE to activate the module.TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output.EnabTime REAL Activation flags must exist greater than this time to activate alarm testing. deltaT REAL Scan Time. Normally in seconds. This variable must have the same units as the TimeDelay variable.fACK BOOL Acknowledge InputDeadband REAL Clear Deadband OUTPUTAlarm BOOL Alarm Output IN/OUT Horn BOOL Horn OutputPurposeThis module generates an analog alarm if the difference between two measurements exceeds the setpoint. It becomes active when two Boolean flags are TRUE.DescriptionThe absolute value between two real values is tested against an alarm setpoint with this function block. The inputs consist two measurements, the setpoint, a time delay, an enable time delay, two flags which activate the module, acknowledge flag, and a clear deadband. The output is the alarm status. The input / output consists of the horn.First the module checks the two activation flags. Both must be TRUE to activate the module. If the flags are not TRUE, the alarm status is cleared and the delay timers are set to zero. If the flags are TRUE, an activation timer is tested. After this timer has expired, the alarm logic is commissioned. The two measurements are subtracted, the sign is removed, and the result is compared to the alarm setpoint. If an alarm condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the alarm status becomes TRUE and the HORN also becomes true. The alarm status will remain true as long as the condition exists. The HORN only becomes true on the alarm transition. There is a dead band around the setpoint for clearing the alarm.If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type DescriptionINPUTMeas1 REAL Measurement # 1 TestedMeas2 REAL Measurement # 2 TestedSetpoint REAL Alarm SetpointFlag1 BOOL Alarm activation flag 1. Must be TRUE to activate the module.Flag2 BOOL Alarm activation flag 2. Must be TRUE to activate the module.TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output.EnabTime REAL Activation flags must exist greater than this time to activate alarm testing. deltaT REAL Scan Time. Normally in seconds. This variable must have the same units as the TimeDelay variable.fACK BOOL Acknowledge InputDeadband REAL Clear Deadband OUTPUTAlarm BOOL Alarm Output IN/OUT Horn BOOL Horn OutputPurposeThis module generates analog trips. It becomes active between two startup modes.DescriptionAn analog or real value may be tested against a trip setpoint with this function block. The inputs consist of the measurement, the setpoint, a high or low trip flag, a time delay, trip number, mode trip testing limits, acknowledge flag and reset flag. The output is the trip status. The input / output consists of the horn, startup mode, and last three first outs.First the module compares the startup mode with the mode trip testing limits. If the mode is outside the limits, the delay timer is set to zero. Otherwise, the setpoint is compared to the measurement, based on the high or low flag. If a trip condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the trip status becomes TRUE and the HORN also becomes true. The trip status will remain true as long as the condition exists and the reset input has not been turned on. The HORN only becomes true on the trip transition. There is not a dead band around the setpoint for clearing the tripIf the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type Description INPUTMeas REAL Measurement TestedSetpoint REAL Trip SetpointHigh_Test BOOL TRUE if Trip when Meas >= Setpoint FALSE if Trip when Meas <= SetpointTrip_No DINT Trip Number. This will be moved into the first out indicator.Low_Mode DINT Alarm is tested at or above this mode.High_Mode DINT Alarm is tested at or below this mode.TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output.deltaT REALfACK BOOL Acknowledge InputfRESET BOOL Trip Reset Input. Trips latch until the condition clears and the reset input is TRUE. OUTPUTTrip BOOL Trip Output IN/OUTHorn BOOL Horn OutputiMODE DINT Startup Sequence ModeFIRST2 DINT Previous First Out (Oldest)FIRST1 DINT Last First Out FIRST DINT First OutA_Trip_2 - Function BlockPurposeThis module generates analog trips. It is activated by two flags.DescriptionAn analog or real value may be tested against a trip setpoint with this function block. The inputs consist of the measurement, the setpoint, a high or low trip flag, a time delay, trip number, twoactivation flags, a activation time, acknowledge flag and reset flag. The output is the trip status. The input / output consists of the horn, startup mode, and last three first outs.First the module checks the two activation flags. Both must be TRUE to activate the module. If the flags are not TRUE, the delay timers are set to zero. If the flags are TRUE, an activation timer is tested. After this timer has expired, the trip logic is commissioned. Then the setpoint is compared to the measurement, based on the high or low flag. If a trip condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the trip status becomes TRUE and the HORN also becomes true. The trip status will remain true as long as the condition exists and the reset input has not been turned on. The HORN only becomes true on the trip transition. There is not a dead band around the setpoint for clearing the tripIf the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type DescriptionINPUTMeas REAL Measurement TestedSetpoint REAL Trip SetpointHigh_Test BOOL TRUE if Trip when Meas >= Setpoint FALSE if Trip when Meas <= SetpointTrip_No DINT Trip Number. This will be moved into the first out indicator.Flag1 BOOL Flag must be TRUE to activate the module.Flag2 BOOL Flag must be TRUE to activate the module. TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output. (Seconds)EnabTime REAL Activation flags must exist greater than this time to activate alarm testing. (Seconds)deltaT REAL Scan cycle (Seconds)fACK BOOL Acknowledge InputfRESET BOOL Trip Reset Input. Trips latch until the condition clears and the reset input is TRUE. OUTPUTTrip BOOL Trip Output IN/OUTHorn BOOL Horn OutputiMODE DINT Startup Sequence ModeFIRST2 DINT Previous First Out (Oldest)FIRST1 DINT Last First Out FIRST DINT First OutD_Alarm_1_02 - Function BlockPurposeThis module generates digital alarms. It becomes active between two startup modes.DescriptionA digital or Boolean value may be tested with this function block. The inputs consist of the input, a opened or closed alarm flag, a time delay, startup mode, mode alarm testing limits, and acknowledge flag. The output is the alarm status. The input / output consists of the horn.First the module compares the startup mode with the mode alarm testing limits. If the mode isoutside the limits, the alarm status is cleared and the delay timer is set to zero. Otherwise, the input is tested, based on the opened or closed flag. If an alarm condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the alarm status becomes TRUE and the HORN also becomes true. The alarm status will remain true as long as the condition exists. The HORN only becomes true on the alarm transition.If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type DescriptionINPUTD_Input BOOL Digital Input TestedHigh_Test BOOL TRUE if Alarm when Closed FALSE if Alarm when OpenediMODE DINT Startup Sequence ModeLow_Mode DINT Alarm is tested at or above this mode.High_Mode DINT Alarm is tested at or below this mode. TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output.deltaT REAL Scan Time. Normally in seconds. This variable must have the same units as the TimeDelay variable.fACK BOOL Acknowledge Input OUTPUTAlarm BOOL Alarm Output IN/OUT Horn BOOL Horn OutputD_Alarm_2_02 - Function BlockPurposeThis module generates digital alarms based on inconsistencies of digital output commands and digital feedback signals. An example is if a pump start command is sent, but the pump running feedback reports the pump is down.DescriptionA digital or Boolean input is compared with a Boolean output with this function block. The inputs consist of the input, a direct or reverse input flag, the digital output, the startup mode, mode alarm testing limits, a time delay, and acknowledge flag. The output is the alarm status. The input / output consists of the horn.The module checks if the digital output state has changed. If so it clears the timer. If this timer expires before the digital input agrees with the digital output, an alarm is generated. The module compares the startup mode with the mode alarm testing limits. If the mode is outside the limits, the alarm status is cleared and the delay timer is set to zero. One additional mode has been provided which will not be tested. Otherwise, the input is tested, based on the Reverse / Direct flag. If an alarm condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the alarm status becomes TRUE and the HORN also becomes true. The alarm status will remain true as long as the condition exists. The HORN only becomes true on the alarm transition. If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type DescriptionINPUTD_Input BOOL Digital Input Tested Rev_Input BOOL TRUE if Input is opposite to the output FALSE if Input is same as the output.D_Output BOOL Digital OutputiMODE DINT Startup Sequence ModeLow_Mode DINT Alarm is tested at or above this mode.High_Mode DINT Alarm is tested at or below this mode.Skip_Mode DINT Do not test in this mode.TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output.deltaT REAL Scan Time. Normally in seconds. This variable must have the same units as the TimeDelay variable.fACK BOOL Acknowledge Input OUTPUTAlarm BOOL Alarm Output IN/OUT Horn BOOL Horn OutputPurposeThis module generates digital alarms. It becomes active when two Boolean flags are TRUE. DescriptionA digital or Boolean value may be tested with this function block. The inputs consist of the input, a opened or closed alarm flag, a time delay, two Boolean flags which must be true to activate the test, an activation time delay, and acknowledge flag. The output is the alarm status. The input / output consists of the horn.First the module checks the two activation flags. Both must be TRUE to activate the module. If the flags are not TRUE, the alarm status is cleared and the delay timers are set to zero. If the flags are TRUE, an activation timer is tested. After this timer has expired, the alarm logic is commissioned. Otherwise, the input is tested, based on the opened or closed flag. If an alarm condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the alarm status becomes TRUE and the HORN also becomes true. The alarm status will remain true as long as the condition exists. The HORN only becomes true on the alarm transition.If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type DescriptionINPUTD_Input BOOL Digital Input TestedAlm_Clsd BOOL TRUE if Alarm when Closed FALSE if Alarm when OpenedFlag1 BOOL Flag must be TRUE to activate the module.Flag2 BOOL Flag must be TRUE to activate the module. TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output. (Seconds)EnabTime REAL Activation flags must exist greater than this time to activate alarm testing.deltaT REAL Scan Time. Normally in seconds. This variable must have the same units as the TimeDelay variable.fACK BOOL Acknowledge Input OUTPUTAlarm BOOL Alarm Output IN/OUT Horn BOOL Horn OutputPurposeThis module generates digital trips. It is active between two startup modes.DescriptionA digital input or Boolean flag may be tested with this function block. The inputs consist of the discrete input, a opened or closed trip flag, a time delay, trip number, mode trip testing limits,acknowledge flag and reset flag. The output is the trip status. The input / output consists of the horn, startup mode, and last three first outs.First the module compares the startup mode with the mode trip testing limits. If the mode is outside the limits, the delay timer is set to zero. Otherwise, the discrete input is tested, based on the opened or closed flag. If a trip condition exists, the delay timer is adjusted upwards. When the delay timer reaches the delay time, the trip status becomes TRUE and the HORN also becomes true. The trip status will remain true as long as the condition exists and the reset input has not been turned on. The HORN only becomes true on the trip transition.If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type DescriptionINPUTD_Input BOOL Discrete TestedTrp_Clsd BOOL TRUE if closed to trip FALSE if opened to tripTrip_No DINT Trip Number. This will be moved into the first out indicator.Low_Mode DINT Alarm is tested at or above this mode.High_Mode DINT Alarm is tested at or below this mode. TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output.deltaT REAL Scan Time. Normally in seconds. This variable must have the same units as the TimeDelay variable.fACK BOOL Acknowledge InputfRESET BOOL Trip Reset Input. Trips latch until the condition clears and the reset input is TRUE. OUTPUTTrip BOOL Trip Output IN/OUTHorn BOOL Horn OutputiMODE DINT Startup Sequence ModeFIRST2 DINT Previous First Out (Oldest)FIRST1 DINT Last First Out FIRST DINT First OutD_Trip_2 - Function BlockPurposeThis module generates digital trips. It becomes active when two Boolean flags are TRUE. DescriptionA digital input or Boolean flag may be tested with this function block. The inputs consist of the discrete input, a opened or closed trip flag, a time delay, trip number, two activation flags, an activation time delay, acknowledge flag and reset flag. The output is the trip status. The input / output consists of the horn, startup mode, and last three first outs.First the module checks the two activation flags. Both must be TRUE to activate the module. If the flags are not TRUE, the delay timers are set to zero. If the flags are TRUE, an activation timer is tested. After this timer has expired, the trip logic is commissioned. Otherwise, the discrete input is tested, based on the opened or closed flag. If a trip condition exists, the delay timer is adjustedupwards. When the delay timer reaches the delay time, the trip status becomes TRUE and the HORN also becomes true. The trip status will remain true as long as the condition exists and the reset input has not been turned on. The HORN only becomes true on the trip transition.If the acknowledge button is true, the HORN will be turned off.Variable TypeParameter Type Description INPUTD_Input BOOL Discrete TestedTrp_Clsd BOOL TRUE if closed to trip FALSE if opened to tripTrip_No DINT Trip Number. This will be moved into the first out indicator.Flag1 BOOL Flag must be TRUE to activate the module.Flag2 BOOL Flag must be TRUE to activate the module.TimeDelay REAL Alarm condition must exist greater than this time interval to generate the alarm output.EnabTime REAL Activation flags must exist greater than this time to activate alarm testing.deltaT REAL Scan Time. Normally in seconds. This variable must have the same units as the TimeDelay variable.fACK BOOL Acknowledge InputfRESET BOOL Trip Reset Input. Trips latch until the condition clears and the reset input is TRUE. OUTPUTTrip BOOL Trip Output IN/OUTHorn BOOL Horn OutputiMODE DINT Startup Sequence ModeFIRST2 DINT Previous First Out (Oldest)FIRST1 DINT Last First Out FIRST DINT First OutDIG_IN - FunctionPurposeThis function will convert two Boolean inputs into a DINT output so that 3420 software can be easily converted to a Standard Steam Turbine software.DescriptionThe 3410 and 3420 software converts the digital inputs and the configuration variables into a three-state DINT. The result is –1 if the variable does not exist, 0 if it exists and is opened, and 1 if it exists and is closed. The purpose of this function to create the same DINT using digital inputs (DI) and existence flags (DI_CFG). A truth table follows: Digital Input Existence ResultFALSE FALSE -1TRUE FALSE -1FALSE TRUE 0TRUE TRUE 1Variable TypeParameter Type Description INPUTDI BOOL Digital InputDI_CFG BOOL Existence Flag FUNCTIONOUTPUT DIG_IN DINT Output of FunctionHISEL - Function BlockPurposePerforms a high select of two to six inputs, and back-calculates those inputs that are not selected. DescriptionThis function block performs a high select of the specified number of inputs (NUMINP ) and places the result in SELINPUT , and the index to the selected input is placed in SELINDEX .• SELINDEX is a DINT output variable, which will have an integer value of 1 to 6depending on which enabled output is the highest. The number of inputs (NUMINP )must be from two to six. Otherwise, the function will return SELINPUT and SELINDEXvalues of zero.• The enabled inputs (INPUT1-INPUT6) that do not have the highest value are backcalculated (forced to a value) if (SELINPUT – INPUT(1-6) >= OFFSET) with the value(SELINPUT – OFFSET ). The corresponding INPBC(1-6) output’s value is set to TRUEif the input is back calculated.Input CI is defaulted to TRUE until it is set to FALSE. To disable this function block, set CI to FALSE. Output CO is always set equal to the value of input CI . If CO is the input to CI of another function block, the whole chain of functions blocks will be disabled. CI and CO have similar functionality as TriStation 1131 EN and ENO standard variables.Variable TypeParameter Type DescriptionINPUT CI BOOL Control In – This input is used to enable/disable the functionblock.•If this input is set to TRUE, this function block is enabled and normal processing will occur. • If this input is set to FALSE, this function block will bedisabled . Output CO will be set to a value of FALSE.No processing of data will occur and all outputs (exceptCO ) will hold their current value.NUMINP DINTNumber of inputs used. This input tells the functionblock how many of the inputs that you intend to use.The extra inputs will be disabled and ignored and maybe left disconnected. You must always start withinput/output INPUT1 and use the inputs in sequentialorder.OFFSET REAL Represents the amount that unselected inputs are allowed to deviate from selected input.OUTPUT CO BOOL Control Out - The value of this output is always equal to the value of input CI , and indicates whether the function blockis enabled or disabled.•If the value of this output is FALSE, the function block is disabled , and is not processing its inputs or outputs. • If the value of this output is TRUE, the function blockis enabled , and is processing its inputs and outputsnormally.。