Introduction to Powers Process Control Language (PPCL)
Contents
1. SIEMENS Introduction to Powers Process Control Language PPCL Solution Partner ltems to be Covered Authorized TALON Dealer 1 POINTS 2 PPCL OVERVIEW 3 CONDITIONAL CONTROL 4 POINT CONTROL 5 PROGRAM CONTROL Page 2 9 2010 SIEMENS CPS TALON Solution Partner Basic Points MOONE SIEMENS LDI Logical Digital Input LDO Logical Digital Output LAI Logical Analog Input LAO Logical Analog Output CPS TALON Bundled Points SIEMENS Bundled points combine two or more digital input and output points to control devices requiring more than one signal L2SL Logical 2 state Latched L2SP Logical 2 state Pulsed LFSSL Logical Fast Slow Stop Latched LOOAL Logical On Off Auto Latched LOOAP Logical On Off Auto Pulsed CPS TALON Virtual Points SIEMENS Virtual points are points defined in the field panel that do not represent a physical device A room temperature set point is an example of a virtual point LDO Logical Digital Output LAO Logical Analog Output Note Input points can also be commanded and therefore used as a virtual point but this is not recommended since LAI points have no initial value CPS TALON Solution Partner Point Names A OA SIEMENS Point names can use up to 30 characters Can use non alphanumeric characters such as decimal points ampersands and dashes amp etc Can more easily be segmented to show various com2. 500 C 501 C THIS CODE DEFINES A TIME PERIOD 502 C FROM 6 45 A M TO 5 30 P M FOR 503 C SFAN TO OPERATE 510 IF TIME GE 6 45 AND TIME LE 17 30 THEN ON SFAN ELSE OFF SFAN Notes The time is updated every second TIME cannot be used to assign a value to a virtual point since its value is not in a standard decimal form CRTIME should be used for this purpose TIME can be used in PPCL for comparison in the IF THEN ELSE statement CPS TALON Time Based Resident Point SIEMENS CURRENT TIME CRTIME Use This resident point maintains the current time and stores the value in a decimal format The following examples show how CRTIME stores values 7 15 a m 7 25 7 30 p m 19 50 The values for this point can range from 0 00 to 23 999721 Example 500 C 501 C THIS CODE DEFINES A TIME PERIOD 502 C FROM 6 45 A M TO 5 30 P M FOR 503 C SFAN TO OPERATE 504 C 510 IF CRTIME GE 6 75 AND CRTIME LE 17 50 THEN ON SFAN ELSE OFF SFAN CRTIME can also be used to assign the current value of time to a virtual LAO type point which allows you to read the current time on a graphic point log etc For example 100 VTIME CRTIME Notes CRTIME is updated every second CPS TALON Solution Partner Time Based Resident Point Authorized TALON Dealer SIEMENS DAY Use This resident point specifies the current day of the week The values used for the DAY point are as follows Number Day of the Week 1 Monday 2 Tuesday 3 Wednesday 4 T
3. Solution Partner Building a Program Authorized TALON Dealer 1 Read and understand the Sequence of Operation 2 Create a Decision Table 3 Create a Flowchart 4 Write a program 5 Check your work SIEMENS CPS TALON Solution Partner Sequence of Operation Authorized TALON Dealer SIEMENS General Operation The zone shall be occupied from 8 00 am to 6 00 pm The room temperature Z01RMT will be averaged Z01RAV using 4 samples over a 10 minute period CPS TALON Sequence of Operation SIEMENS Day Mode During the day the air handler shall run continuously When the air handler is started the mixed air damper A01MAD shall be opened and the supply air fan AO1SAF shall start The return fan AO01RAF shall start 30 seconds after the supply fan starts The hot water valve A01HWV shall be modulated to maintain the supply air temperature A01SAT at set point A01SAS The supply air set point AO01SAS will be reset based on the following schedule Avg Room Temp Z01RAV Set Point A01SAS 65 100 is 70 CPS TALON Sequence of Operation SIEMENS Night Mode During the unoccupied period the mixed air damper A01MAD will be closed and the supply fan A01SAF and the return fan AO1SAF are turned off Safety Mode If the Low Temperature Detector AO1LTD or the smoke alarm point A01SMk go into alarm Then the system shall shut the mixed air dampers AO1MAD and turn off
4. 2010 CPS TALON Delay Methods SIEMENS Use The WAIT command turns a point ON or OFF based on the trigger point switching ON or OFF Selection of trigger result action is based on the mode you enter Example WAIT 30 SFAN RFAN 11 WAIT 120 PLITE OLITE 00 WAIT 45 DAYMD NITEMD 01 WAIT time trigger pt command pt mode Page 91 9 2010 CPS TALON Solution Partner Delay Methods EEO SIEMENS Example WAIT 30 SFAN RFAN 11 Since this has a mode of 11 SFAN turns ON 1 WAIT statement will delay 30seconds Then turn ON 1 RFAN WAIT time trigger pt command pt mode Page 92 9 2010 CPS TALON Solution Partner Delay Methods MOEMOE SIEMENS Example WAIT 120 PLITE OLITE 00 Since this has a mode of 00 When PLITE turns OFF 0 WAIT statement will delay 120 seconds Then turn OFF 0 OLIT WAIT time trigger pt command pt mode Page 93 9 2010 CPS TALON Solution Partner Delay Methods MOEMOE SIEMENS Example WAIT 45 DAYMD NITEMD 01 Since this has a mode of 01 When the DAYMD turns OFF 0 WAIT statement will delay 45 seconds Then turn ON 1 NITEM WAIT time trigger pt command pt mode Page 94 9 2010 CPS TALON Solution Partner Delay Methods MOONA SIEMENS The position of a WAIT statement within a program will affect its operation The WAIT statement will only work if it sees a change of value COV for the trigger point In other words The WAIT statement need
5. The WAIT statement is an effective and easy way to incorporate equipment delays but it does have limitations The WAIT statement only makes one attempt at commanding the point The WAIT statement only allows one point to be commanded per statement The WAIT statement only works with digital points Page 98 9 2010 CPS TALON Using IF THEN Statements for Delays SIEMENS Conditional statements can also be used to delay commands Conditional statements use timers such as the SECNDS counter to enact command delays Line 100 operates the trigger by keeping the SECNDS counter at 0 until we want the delay to begin in this case when the SFAN turns ON Line 100 does this by commanding the SECNDS counter to 0 when the SFAN is OFF Remember the SECNDS counter always counts up unless we change its value 100 IF SFAN EQ OFF THEN SECNDS 0 110 IF SECNDS GT 30 THEN ON RFAN ELSE OFF RFAN Line 110 watches the SECNDS counter that is being controlled by line 100 When the SFAN turns ON line 100 stops commanding the SECNDS counter and it begins to count up When the SECNDS counter becomes greater than 30 seconds the RFAN is commanded ON Note that this line also commands the RFAN OFF when the SECNDS counter is below 30 seconds 100 IF SFAN EQ OFF THEN SECNDS 0 f 10 IF SECNDS GT 30 THEN ON RFAN ELSE OFF RFAN Page 99 9 2010 CPS TALON Solution Partner Dead band Switch Authorized TALON Dealer SIEMENS me
6. is 0 10 V then the bias Is 5V Output Gain Adjustments LOOP control calculates its output based upon the Bias and Gain Adjustments Output Bias Gain Adjustments Page 116 9 2010 CPS TALON Solution Partner LOOP Statement N E O SIEMENS LOOP type pv cv sp pg ig dg st bias lo hi 0 The Gain Adjustments portion of the output calculation accounts for the proportional integral and derivative gains Output Bias Gain Adjustments Bias is the mid point of the output command range For example if the output is 0 10 V then the bias is 5V Lo has a value of 0 and Hi has a value of 10 LOOP Type PV CV SP PG IG DG ST Bias Lo Hi 0 8 PSI Bias 5 5 PSI Mid point Cold Water Valve Page 117 9 2010 sd CPS TALON Solution Partner LOOP Statement E O SIEMENS LOOP type pv cv sp pg ig dg st bias lo hi 0 The last value is always zero 0 and is reserved for future use Examples LOOP 0 RM12 HWV HWSP 1000 10 0 1 5 5 3 0 8 0 0 LOOP 128 RM12 EHT RMSP 750 14 0 1 5 0 0 0 10 0 0 LOOP 0 SAP FNVN SPSP 1200 22 8 1 10 5 8 0 13 0 0 Page 118 9 2010 CPS TALON Solution Partner Creating a Prog ram Authorized TALON Dealer SIEMENS e List the steps for creating a PPCL Program e Given a Sequence of Operation create a Decision Table and Flow Chart e Identify PPCL statements that can control program flow e Describe how point priorities can affect commanding points in PPCL CPS TALON
7. one out of the two to be TRUE the whole experience expression X OR Y will be equated to TRUE Example 200 IF TIME LT 5 00 OR TIME GT 17 00 THEN ON LIGHTS Page 69 9 2010 CPS TALON Logical Expressions SIEMENS AND statement checks two sets of conditions and returns a TRUE if both condition are TRUE Below is a basic AND Truth Table In the second row of the table X is TRUE the Lights are ON and Y is FALSE the Lights are not on Since the AND operator requires both to be TRUE the whole expression X AND Y will be equated to FALSE Example 200 IF TIME LT 19 00 AND TIME GT 5 00 THEN ON LIGHTS Page 70 9 2010 CPS TALON Solution Partner Logical Expressions Authorized TALON Dealer SIEMENS XOR statement checks two sets of conditions and returns a TRUE if either condition is TRUE However if both conditions are TRUE it will return a FALSE Below is a basic XOR Truth Table In the first row of the table X is TRUE PUMP1 is ON and Y is TRUE PUMP2 is ON as well Since the exclusive or operator requires only one out of the two to be TRUE the whole expression X exclusive or Y will be equated to FALSE Example 200 IF PMP1 EQ ON XOR PMP2 EQ ON THEN NORMAL PMPALM Page 71 9 2010 CPS TALON Solution Partner Logical Expressions EONO SIEMENS NAND statement checks two sets of conditions and returns a FALSE if both conditions are TRUE Otherwise it will return a TRUE It is opposite of t
8. points pt1 ot12 are commanded ON when the input point value rises above the high limit and are commanded OFF when the input point value falls below the Low limit e 1 All output points pt1 ot12 are commanded ON when the input point value falls below the low limit and are commanded OFF when the input point value rises above the high limit Page 102 9 2010 CPS TALON Dead Band Switch SIEMENS DBSWIT type input low high pt1 pt12 The input is a point that triggers the commanding within the DBSWIT When the input rises above the high limit or drops below the low limit ug ad ponis will be commanded ON or OFF based upon the type of ead Ban low and high represent the lower and upper values of the Dead Band area When the input is between these limits no action is taken Pt1 Pt12 This is a list of up to 12 digital points that are commanded when the Input rises above the High limit or drops below the Low limit When the input is between those limits it does not command these points Page 103 9 2010 CPS TALON Solution Partner Dead Band Switch Authorized TALON Dealer SIEMENS Example High Limit 55 Degrees Type 1 Heating DBSWIT 1 RMT 55 58 SFAN Page 104 9 2010 CPS TALON Dead Band Switch SIEMENS Example DBSWIT 1 RMT 55 58 SFAN Point 1 starts with the SFAN being commanded OFF by the DBSWIT The OFF command occurs since we are using a Type 1 Heating Dead Band
9. the supply fan A01SAF and the return fan A01RAF CPS TALON Sequence of Operation SIEMENS Point List A01MAD A01SAF A0O1RAF ZO1RMT ZO1RAV A01SAT A01SAS A01HWV A01 LTD A01SMK Mixed Air Damper LDO Supply Fan LDO Return Fan LDO Zone 1 Room Temp LAI Avg Room Temp virtual LAO Sup Air Temp LAI Sup Air Set Point virtual LAO Heating Valve LAO Low Temp Detector LDI Smoke Alarm LDI CPS TALON Solution Partner Decision Table Mihara SIEMENS Decision Tables are used to identify the various modes and points that will commanded in the program It lists all of the points to be commanded and each point s value for the various modes of the program A01SAF A0O1RAF ON OFF OFF A01MAD ON OFF OFF CPS TALON Solution Partner Program Flowchart MOUONTO SIEMENS The Program Flowchart maps out the flow and decision making of the PPCL program Night Mode Safety Mode GOTO Start CPS TALON Program Flowchart Turn ON A01MAD Turn ON A01SAF Turn ON A01RAF Reset A01SAS Modulate A01HWV Return Solution Partner Authorized TALON Dealer Day Mode SIEMENS CPS TALON Program Flowchart Night Mode Turn OFF A01SAF Turn OFF A01 RAF Turn OFF A01MAD Return Solution Partner Authorized TALON Dealer Night Mode SIEMENS CPS TALON Program Flowchart Safety Mode Turn OFF A01SAF Turn OFF A01RAF Turn O
10. FF A01MAD Return Solution Partner Authorized TALON Dealer Safety Mode SIEMENS CPS TALON PPCL Program SIEMENS 999 C COMMON 1000 TIMAVG Z01 RAV 600 4 Z01RMT 1999 C PROGRAM DECISION 2000 IF A01 SMK EQ ALARM THEN GOTO 7000 2010 IF A01 LTD EQ ON THEN GOTO 7000 2020 IF TIME LT 08 00 OR TIME GT 18 00 THEN GOTO 6000 2030 GOTO 5000 4999 C OCCUPIED 5000 ON A01MAD A01SAF 5010 IF A01 SAF EQ OFF THEN SECNDS 0 5020 IF SECNDS GT 30 THEN ON A01 RAF 5030 TABLE Z01 RAT A01 SAS 65 100 75 75 5040 LOOP 0 A01SAT A01 HCV A01SAS 900 25 0 1 5 5 3 0 8 0 0 5050 GOTO 8000 5999 C UNOCCUPIED 6000 OFF A01 MAD A01 SAF A01 RAF 6010 GOTO 8000 6999 C SAFETY 7000 OFF A01 MAD A01 SAF A01 RAF 7010 SET 3 0 A01 HWV 7020 GOTO 8000 8000 GOTO 1000 CPS TALON Solution Partner Authorized TALON Dealer SIEMENS Questions Page 131 9 2010 CPS TALON
11. Page 108 9 2010 CPS TALON Solution Partner Loop Control ASA OND Ga SIEMENS Hot ater Valve Step 3 The calculated output is then sent to the controlled device e g a hot water valve The output adjusts the conditions in the system to bring the input closer to the set point Page 109 9 2010 CPS TALON Solution Partner Loo p Control ASA OND Ga SIEMENS Step 4 Finally the command given by the output changes the temperature of the air which is seen by the temperature sensor This action provides feedback to the LOOP Page 110 9 2010 CPS TALON Solution Partner Loop Control Authorized TALON Dealer SIEMENS Hot Water Valve The whole process continuously repeats itself making minor adjustments as operating conditions change Page 111 9 2010 CPS TALON Solution Partner LOOP Statement EONO EA SIEMENS LOOP type pv cv sp pg ig dg st bias lo hi 0 The LOOP statement provides PID proportional integral derivative control for your system and is one of the most powerful statements in PPCL Page 112 9 2010 CPS TALON LOOP Statement SIEMENS LOOP type pv cv sp pg ig dg st bias lo hi 0 LOOP control takes into account different types of output adjustments gains Proportional Gain PG Integral Gain IG Derivative Gain DG When LOOP control calculates the output signal it uses PG IG and DG to determine how much to adjust the output Each type of gain reacts to sy
12. and the input room tempature RMT is above the high limit 58 degrees As the room temperature is starts to cool and has entered the Dead Band area Within the Dead Band the DBSWIT does not command the SFAN so it will remain in the OFF position As the room temperature drops below the low limit of 55 degrees This triggers the DBSWIT to command the SFAN ON to bring warm air into the room The room temperature will not start to rise The room temperature RMT is now starting to rise and has re entered the Dead Band area Within the Dead Band the DBSWIT does not command the SFAN so it will remain in the ON position The SFAN has now blown enough warm air into the room to raise its temperature above the high limit of 58 degrees The DBSWIT now turns the SFAN OFF since the room does not need to be further heated Page 105 9 2010 CPS TALON LOOP Control Authors Deca SIEMENS LOOP control compares an input to a set point and then calculates an output Page 106 9 2010 CPS TALON Solution Partner Loop Control Authorized TALON Dealer SIEMENS Hot Vater Valve Step 1 The controller reads the input point value The input is the point that the LOOP is trying to control Page 107 9 2010 CPS TALON Solution Partner Loop Control Authorized TALON Dealer SIEMENS Hot Water Valve Step 2 The value of the input is now compared to the set point and then the controller calculates an output
13. bbreviations used in other PPCL statements Represents the string parameter String is the actual text string that will be substituted where the abbreviation is used This string text usually contains a significant portion of a long point name Example XVSAF is the same as AHU1SAF 10 DEFINE X AHU1 20 ON X SAF Without the use of the DEFINE statement Line 20 would look like 20 ON AHU1SAF Page 27 9 2010 CPS TALON Solution Partner Creating PPCL Programs MEEO SIEMENS There are many ways to create a PPCL program This section provides an overview of the steps and tools used to create effective PPCL programs CPS TALON Solution Partner Programming Steps AA OND Ga SIEMENS Typically there are five steps used in the creation of a PPCL program Clearly understand the problem that is trying to be solved Plan a solution Create a solution Implement the solution Verify operation and check you work CPS TALON Solution Partner PPCL Program Development MOONA SIEMENS PPCL program development uses several steps to develop and test the program These are listed below Each step in the process builds on the result from the previous step Sequence of Operation Decision Table Flowchart PPCL Code CPS TALON Sequence of Operation SIEMENS The first step in creating a PPCL program is to analyze the problem During the analysis a Sequence of Operation is developed an
14. d or reviewed The Sequence of Operation describes how the system should operate Once the PPCL program is created its operation must be tested and compared to the Sequence of Operation sequence of Operation General Control Day Control Might Control CPS TALON Sequence of Operation SIEMENS Between the scheduled hours of occupancy jhe supply and return air fans will constantly run and the hot water valve will modulate to maintain supply air temperature Outside of the scheduled hours of occupancy the supply and return fans will be off and the hot water valve will be shut and a low temperature detector will be provided in the supply duct If the low temperature detector trips the supply and return fans will be shut off and the hot water valve will be closed Note Notice that the modes are separated and the equipment that it controls is defined during those modes CPS TALON Decision Table SIEMENS The Decision Table is created from the Sequence of Operation The Decision Table lists all the equipment or outputs that the PPCL program needs to control The Decision Table separates the modes of operations day night etc and identifies the operating state ON OFF Modulate etc of the equipment for a particular mode CLOSED CLOSED a CPS TALON Solution Partner Flowchart MORON SIEMENS The Flowchart is a visual diagram that shows the logical progression of the control
15. e 86 9 2010 CPS TALON Solution Partner Time Average Example MEEO SIEMENS The next calculation occurs at 12 20 This calculation takes into account the previous 4 times to get a value of 73 5 for the result point AVGTMP 12 00 72 12 05 73 SUM 72 73 73 74 294 12 15 74 TIMAVG 192 4 73 5 12 20 74 _ TIMAVG AVGTEMP 300 4 0AT Page 87 9 2010 CPS TALON Solution Partner Delay Methods MOEMOE SIEMENS WAIT statement In many instances you will want to program delays into your system For example when the supply fan starts wait for 30 seconds and then start the return fan Programming delays are normally done in one of two ways WAIT statement SECNDS counter with IF THEN statement Page 88 9 2010 CPS TALON Solution Partner Delay Methods EEO SIEMENS Each mode is designated by a two digit number O OFF 1 ON The first digit corresponds to the trigger point and the second digit corresponds to the command point The chart lists all possible modes When The Trigger command point turns Page 89 9 2010 CPS TALON Solution Partner Delay Methods MOEMOE SIEMENS WAIT time trigger pt command pt mode The WAIT statement can be used to place delays on digital points The WAIT command waits for the trigger point to change its value and then commands the command point after the time delay The mode defines how the WAIT statement operates Page 90 9
16. e for every one second of real time that passes e The initial value of the SECNDS point is set by a PPCL command e The SECNDS point can be set to a maximum value of 9 999 Example 890 IF SFAN NE PRFON THEN SECNDS 0 Notes For TALON field panels each program has a unique SECNDS point This point can also be viewed in the interface using the program name system delimiter SECNDS format Page 61 9 2010 CPS TALON Time Base Resident Point SIEMENS Seconds counters SECND1 through SECND7 Syntax SECNDn n The number that describes which SECNDn point is referenced Valid values for SECNDn are 1 through 7 Use These seven resident points count real time seconds and can be used as timers The computer adds one 1 to the SECNDn variable for every one second of real time that passes e The value of a SECNDn point can only be set by a PPCL command e The maximum value a SECNDn point can be set to is 9 999 Example 600 IF SECND1 GT 15 THEN ON RF ELSE OFF RF Notes For TALON field panels each program has unique SECNSn points These points can also be viewed in the interface using the program name system delimiter SECNDn format Page 62 9 2010 CPS TALON Other resident Points e BATT e PDL e LINK e NODEO through NODE99 Page 63 9 2010 Solution Partner Authorized TALON Dealer SIEMENS CPS TALON Other resident Points SIEMENS BATT TALON filed panels have the ability to monitor t
17. e network 1 The node where the LINK point resides is actively communicating with the network Example 300 IF LINK EQ 0 THEN ON ALARM Page 66 9 2010 CPS TALON Other resident Points SIEMENS NODEO through NODE99 Allows the program to check the status of a node on the network All field panels on the network occupy a node corresponding to its address This point is generally used to test for normal operation of nodes for control strategies that depend on network communication Example 600 IF NODE22 EQ FAILED THEN ON ALARM Note This command is not described in the TALON PPCL manual so there needs to be confirmation on how this works with BACnet Page 67 9 2010 CPS TALON Solution Partner Logical Expressions MEAO SIEMENS A Logical Expression is two or more relational expressions linked together by logical operators AND OR XOR NAND Logical expressions use Truth Tables to determine the TRUE or FALSE value of the expression Example For the AND expression to be TRUE both the first and the second relational expressions must be evaluated TRUE Page 68 9 2010 CPS TALON Solution Partner Logical Expressions MEAO SIEMENS OR statement checks two sets of conditions and returns a TRUE if either condition is TRUE Below is a basic OR Truth Table In the second row of the table X is TRUE the Lights are ON and Y is FALSE the Lights are not on Since the OR operator only requires
18. ee Band control is a method of maintaining system parameters between a high and low imit The range between the high and low limit is known as the Dead Band When the system is above the high limit or below the low limit it responds by peroni an action that attempts to bring the system back to the Dead Band hese areas are denoted as Point Commanding Zones in the diagram _ When the system is in the Dead Band area no action is taken Point Commanding Zone High Limit l Low Limit Point Commanding zone w o oe D amp w Bee O Q O Page 100 9 2010 CPS TALON Dead Band Switch SIEMENS Dead Band operate in two different modes or types Cooling Mode Type 0 Heating Mode Type 1 Type 0 is known as the Cooling Type In this tyoe of Dead Band the points are commanded ON above the upper limit The points are commanded OFF below the lower limit The points are not commanded within the Dead Band Type 1 is Known as the Heating Type In this tyoe of Dead Band the points are commanded OFF above the upper limit The points are commanded ON below the lower limit The points are not commanded within the Dead Band Page 101 9 2010 CPS TALON Dead Band Switch SIEMENS DBSWIT type input low high pt1 pt12 The DBSWIT statement Dead Band Switch is used to cycle up to twelve 12 digital points ON and OFF through a dead band type The type of dead band switch action e 0 All output
19. eturns back to the first line to repeat the process CPS TALON Program Execution Solution Partner Nested Programs Authorized TALON Dealer SIEMENS TC s can contain multiple PPCL programs Because the firmware can only execute one line at a time each program takes a turn executing a single line and then passes its turn to the next program Within each program lines are still executed in ascending order Program 1 2700 IF AQULTD 60 ONOR AOISSD EQ ON JOR ADTRSD EC ON THEN GOTO 7000 20 IF AQMOD 60 8 0 THEN GOTO 8400 2720 IF A01MOD EG 4 0 THEN GOTO 3000 2730 IF ANMOD EG 7 0 THEN GOTO 4000 Program 2 6000 OFF ACSF ACTRAF G20 IF 0AA LT SANDANSAFEOCOFF THEN ANHO AHVRT 6240 IF OAA GT SANDANSAF EOCOFF THEN ANHCO 0 0 CPS TALON Solution Partner GOTO Statement Authorized TALON Dealer SIEMENS The GOTO statement can be used to jump to a particular line of code in the program In the example below when line 10 is executed and if FREEZE is in ALARM the program jumps to line 100 bypassing the lines in between Era ie CPS TALON Solution Partner GOTO Statement Authorized TALON Dealer SIEMENS GOTO statements MUST always jump to a HIGHER line number NEVER use a GOTO statement to jump to a lower number EXCEPT for the GOTO statement located on the last line of the program Do not use a GOTO to transfer control to the top of a program before the last line is exec
20. ge 78 9 2010 CPS TALON IF THEN ELSE SIEMENS IF expression THEN true cmd ELSE false cmd Examples 100 IF DAY GE 6 THEN ON WKEND ELSE OFF WKEND 110 IF TIME LT 08 00 OR THIME GT 18 00 THEN OFF DAYMD ELSE ON DAYMD 120 IF SECNDS GT 30 THEN SET 8 0 0AD ELSE SET 3 0 0AD Page 79 9 2010 CPS TALON Solution Partner Su mmary So Far Authorized TALON Dealer SIEMENS e How to use point command statements like ON OFF FAST and SET e How to interpret an IF THEN statement e How to use relational operators like EQ GT and LE e How to use resident points e How to use logical operators like AND and OR e And how to interpret the IF THEN ELSE statement Page 80 9 2010 CPS TALON Solution Partner Point Com parison Statements Authorized TALON Dealer SIEMENS There are several statements to used to compare points These statements include lt MIN lt MAX Page 81 9 2010 CPS TALON Point Comparison Statements SIEMENS The MIN statement examines a group of up to 15 points pt1 pt15 and selects the point with the lowest value This value is assigned to the result point For the three meters shown below we could write a MIN statement to determine the lowest value In this case the value of meter one will be set equal to the result point MIN LOWVOL Meter1 Meter2 Meter3 i Metert 5 Volts Meter2 10 Volts Meter3 15 Volts Page 82 9 2010 CPS TALON Po
21. he AND statement Below is a basic NAND Truth Table In the second row of the table X is TRUE the Lights are ON and Y is FALSE the Lights are not on Since the not and operator is only FALSE if both X and Y are FALSE the whole expression X not and Y will be equated to TRUE Example 100 IF LDO1 EQ ON AND LDO2 EQ ON THEN OFF LDO3 ELSE ON LDO3 X LDO1 EQ ON Y LDO22 EQ ON Page 72 9 2010 CPS TALON Logical Expression Evaluation Examples SIEMENS IF SFAN EQ ON AND OAT GT 70 THEN SET 4 0 OAD The IF THEN statement shown above is read as if the supply fan equals on and the outside air temperature is greater than 70 degrees then set the outside air damper to 4 percent Page 73 9 2010 CPS TALON Logical Expression Evaluation Examples SIEMENS 1 The first step in evaluating a logical expression is to always evaluate the left X and right Y condition In our example the SFAN is ON so the left condition SFAN EQ ON evaluates to TRUE IF SFAN EQION AND OAT GT 70 THEN SET 4 0 0AD TRUE 2 Now the right side Y of the logical expression is evaluated In this example the outside air temperature is 65 degrees This makes the condition OAT GT 70 equate to FALSE since 65 is not greater than 70 IF SFAN EQ ON AND JOAT GT 70 THEN SET 4 0 0AD TRUE FALSE Page 74 9 2010 CPS TALON Logical Expression Evaluation Examples SIEMENS 3 Once the left and right hand sides of the logical exp
22. he status of a point to some value i i DAMPER LT 3 wien tei DAMPER LT 3 Evaluation Relations operators always evaluate to TRUE or FALSE Page 53 9 2010 CPS TALON Relational Operators SIEMENS IF THEN Evaluation 1 The following relational expression is used in an IF THEN statement Example IF SFAN NE ON THEN ON SFAN If the SFAN is not ON then turn on the SFAN The first step to evaluating an IF THEN statement is examine the expression The expression in the above statement is SFAN NE ON if it is TRUE then the command after the THEN is executed If the expression is FALSE then the command after the THEN is ignored Page 54 9 2010 CPS TALON Resident Points SIEMENS These are maintained by the system They are pre defined Have reserved names that cannot be used by another point Cannot be viewed directly Are activated when used Do not take any additional memory from the field panel There are three types of resident Points Time Based Resident Points Alarm Based resident Points Other Resident Points Resident Points can be used in place of regular points in the IF THEN statements Page 55 9 2010 CPS TALON Resident Points SIEMENS Time Base Resident Points Time Use This resident point maintains the current time and stores the value in military time The TIME value can contain a value from 0 00 to 23 59 The following examples show how TIME stores values 7 15 a m 7 15 7 30 p m 19 30 Example
23. he strength of their backup battery the BATT resident point allows you to access that status The status of BATT can be tested for a numeric value The status can also be tested by using the backup battery status indicators BATT numeric values are 0 50 or 100 A BATT value of 0 indicates battery has discharged and must be replaced A BATT value of 50 indicates battery is about to be discharged and should be replaced to prevent loss of data A BATT value of 100 indicates battery does not need to be replaced BATT status indicators are LOW DEAD or OK A BATT status is LOW or DEAD then the battery has discharged and must be replaced A BATT status of OK indicates battery does not need to be replaced Example 1 200 IF BATT EQ 0 THEN ALARM P26BAT Example 2 210 IF BATT EQ DEAD THEN ALARM P26BAT Page 64 9 2010 CPS TALON Solution Partner Other resident Points O SIEMENS PDL Is a resident point that takes on the current value of the demand prediction for each calculated interval made by the PDLMTR statement The point can be assigned to a virtual LAO point displayed and trended Exam a 350 KWH PDL Page 65 9 2010 CPS TALON Other resident Points SIEMENS LINK Is a resident point that indicates the condition of communications Depending on the status of the communications link a point contains one of the following values 0 The node where the LINK point resides in not communicating with th
24. hursday 5 Friday 6 Saturday 7 Sunday Example 300 IF DAY EQ 1 THEN TOTRAN 0 Notes These values are not related to the modes used in the TODMOD statement Page 58 9 2010 CPS TALON Time Base Resident Point SIEMENS Day of the month DAYOFM Syntax DAYOFM Use This resident point specifies a particular day of any month Valid values for DAYOFM are 1 through 31 The value corresponds to the numerical calendar day of a month Example 160 C THIS SECTION OF CODE DETERMINES IF 162 C IT IS THE FIRST DAY OF THE MONTH 164 C IF SO SET TOTMON TO 0 166 C 180 IF DAYOFM EQ 1 THEN TOTMON 0 Notes This point is helpful when you have to perform certain operations on a specific day for example generating a report on the first day in the month Page 59 9 2010 CPS TALON Solution Partner Time Base Resident Point Authorized TALON Dealer SIEMENS MONTH Use This resident point specifies the current month The values used for the MONTH point are as follows Number Month 1 January 2 February 3 March 4 April 5 May 6 June 7 July 8 August 9 September 10 October 11 November 12 December Example 950 IF MONTH GE 4 AND MONTH LE 10 THEN SEASON 1 ELSE SEASON 0 Page 60 9 2010 CPS TALON Time Base Resident Point SIEMENS Seconds counter SECNDS SECNDS Use This resident point counts real time seconds and can be used as a timer The computer adds one 1 to the SECNDS variabl
25. int Comparison Statements SIEMENS The MAX statement examines a group of up to 15 points pt1 0t15 and selects the point with the highest value This value is assigned to the result point For the three meters shown below we could write a MAX statement to determine the highest value In this case the value of meter one will be set equal to the result point MAX MAXVOL Meter1 Meter2 Meters Meter1 5 Volts Meter2 10 Volts Meter3 15 Volts Page 83 9 2010 CPS TALON Time Average Statement SIEMENS TIMAVG RESULTS ST SAMPLES INPUT The TIMAVG statement is used to average the INPUT point s values over time The SAMPLES entry tells the field panel values to average The sample time ST designates how much time between individual samples The average is stored in the RESULT point Page 84 9 2010 CPS TALON Solution Partner Time Average Example EONA SIEMENS We will examine the outside air temperature over a five minute period TIMAVG Sum of Samples Number of Samples TIMAVG AVGTEMP 300 4 0AT Page 85 9 2010 CPS TALON Solution Partner Time Average Example EEO SIEMENS First calculation Since the number of samples is 4 we will look at the first 4 samples 12 00 12 15 of our data The sample time is 300 seconds or 5 minutes For the first calculation the OAT values are added together and divided by 4 to yield 73 degrees TIMAVG AVGTEMP 300 4 0AT Pag
26. must be separated by a comma and up to 16 points can be commanded in one statement Examples Single Point 10 OFF SFAN Multiple Points 20 OFF SFAN RFAN 30 OFF FAN1 FAN2 FAN3 FAN4 FANS CPS TALON Point Control Statements SIEMENS Common used point control statements The SLOW statement is a PPCL command used to command a bundle point to the SLOW Condition NOTE The SLOW statement is only valid for the following bundled point types Logical Fast Slow Stop Latched LFSSL Logical Fast Slow Stop Pulsed LFSSP Syntax SLOW pt7 pt16 Each point must be separate by a comma and up to 16 points can be commanded in one statement Examples Single Point 110 SLOW SFAN Multiple Points 120 SLOW SFAN RFAN CPS TALON Point Control Statements SIEMENS Common used point control statements The FAST statement is a PPCL command used to command a bundled point to the FAST Condition NOTE The FAST statement is only valid for the following bundled point types Logical Fast Slow Stop Latched LFSSL Logical Fast Slow Stop Pulsed LFSSP Syntax FAST pt7 t16 Each point must be separate by a comma and up to 16 points can be commanded in one statement Examples Single Point 110 FAST SFAN Multiple Points 120 FAST SFAN RFAN CPS TALON Point Control Statements SIEMENS Common used point control statements The SET statement is a PPCL command used to command an assign value to an analog poin
27. on TEMP EQ 72 0 temperature equals 72 GT the relational operator Greater Than is used to check if the first value is greater than the second value Examples TIME GT 08 00 time greater than 8 am TEMP GT 72 0 temperature greater than 72 GE the relational operator Greater Than or Equal To is used to check if the first value is greater than or equal to the second value Example TEMP GE 72 0 temperature greater than or equal to 72 Page 51 9 2010 CPS TALON Relational Operators SIEMENS LT the relational operator Less Than is used to check if the first value is less than the second value Examples TIME LT 17 00 time less than 5 pm TEMP LT 72 0 temperature less than 72 LE the relational operator Less Than or Equal To is used to check if the first value is less than or equal to the second value Examples TEMP LE 72 0 temperature less than or equal to 72 NE the relational operator Not Equal To is used to check if the first value is different than second value Example FAN NE ALARM fan is not in alarm PUMP NE FAILED pump has not failed Page 52 9 2010 CPS TALON Using Relational Operators SIEMENS Relational operators always compare one value to another The points name is always placed on the left side of the operator Example Check the status of the SFAN being ON SFAN EQ ON Check the status of the proof point of the RFAN to ON RFAN NE ON Evaluated expressions Examples Check t
28. ponents of the point name Example Point name with three segments B304 AHU04 SAT CPS TALON Solution Partner Programming Objectives MUOTOA SIEMENS Definition of PPCL and its function Steps to create PPCL programs How to use the PPCL User s Manual Rules and Guidelines for PPCL CPS TALON What is PPCL SIEMENS Advanced Tool PPCL is an advanced tool that works with the features of the Siemens TALON BACnet building automation system Where is PPCL Used TC Modular Controller TC Compact Controllers Reduced set in the Programmable TECs PTEC PPCL consists of statements that are used to monitor and control system componenis CPS TALON Solution Partner PPCL Sample Program MAOO SIEMENS The listing below shows part of a PPCL program This program controls a supply fan return fan and a virtual point that is used to control the supply air temperature The PPCL program consists of a series of numbered lines that contain command statements The common statements act on points to monitor and control the system components Line 30 and 100 are examples of a Command statement which is used to convey instructions for the field panel to execute Every line of PPCL starts with a line number CPS TALON Solution Partner Prog ram Execution Authorized TALON Dealer SIEMENS The program executes each line of code in ascending order When the program reaches the last line it automatically r
29. r Defines a specific point priority pt1 through Pt15 Point names of LDO L2SL L2SP LOOAL or LOOAP points CPS TALON PPCL User s Manual SIEMENS Use Section The Use section describes what function the command performs and provides on line examples of program code Use Changes the operational status of an ON OFF AUTO point to ON e A maximum of 16 points can be changed with one ON command e A maximum of 15 points can be defined with one ON prior command Example 100 IF OATEMP LT 60 0 THEN ON NONE PUMP1 PUMP2 CPS TALON Solution Partner PPCL User s Manual Authorized TALON Dealer SIEMENS Remarks and See Also Section Remarks Give helpful hints regarding the command See Also Refers you to other similar types of commands See also AUTO FAST OFF SLOW CPS TALON Point Control Statements SIEMENS Common used point control statements The ON statement is a PPCL command used to command a digital point to the ON Condition Syntax ON pt7 0 16 Each point must be separated by a comma and up to 16 points can be commanded in one statement Examples Single Point 10 ON SFAN Multiple Points 20 ON SFAN RFAN 30 ON FAN1 FAN2 FAN3 FAN4 FANS CPS TALON Point Control Statements SIEMENS Common used point control statements The OFF statement is a PPCL command used to command a digital point to the OFF Condition Syntax OFF pi 7 pt16 Each point
30. ression are evaluated the AND is brought down between the results from the left and the right side Now the expression reads TRUE and FALSE IF SFAN EQ ON AND OAT GT 70 THEN SET 4 0 0AD TRUE AND FALSE 4 Finally the logical expression can be evaluated for the answer The AND operator requires both the left X and right Y side conditions to be TRUE to evaluate to TRUE so our expression evaluates to FALSE TRUE AND FALSE J FALSE Page 75 9 2010 CPS TALON Solution Partner Logical Expression Evaluation Examples P a SIEMENS 5 Finally the logical expression can be evaluated for the answer The AND operator requires both the left X and right Y side conditions to be TRUE to evaluate to TRUE so our expression evaluates to FALSE IF SFAN EQ ON AND OAT GT 70 THEN fiso TRUE AND FALSE Page 76 9 2010 CPS TALON Solution Partner IF THEN ELSE Authorized TALON Dealer SIEMENS Just Like the IF THEN statement when the expression evaluates to TRUE the command directly following the TRUE command is executed IF expression THEN TRUE cmd ELSE FALSE cmd TRUE Page 77 9 2010 CPS TALON Solution Partner IF THEN ELSE Authorized TALON Dealer SIEMENS The IF THEN ELSE statement also provides a command to execute when the expression evaluates to FALSE The command is placed after the ELSE and denoted a FALSE command IF THEN TRUE cmd ELS FALSE cmd False Pa
31. s to see the trigger point in both the ON and OFF states If the WAIT statement does not see the trigger point change then the command point will never be commanded Correct Method 100 WAIT 30 FAN1 FAN2 11 110 ON FAN1 Incorrect Method 100 ON FAN1 110 WAIT 30 FAN1 FAN2 11 Page 95 9 2010 CPS TALON Solution Partner Delay Methods MOONA SIEMENS Correct Correct Method 100 WAIT 30 FAN1 FAN2 11 110 ON FAN1 Incorrect Method 100 ON FAN1 110 WAIT 30 FAN1 FAN2 11 This is a proper way to employ the WAIT statement Notice that the WAIT statement is written before FAN1 is commanded ON This allows the WAIT statement to see FAN1 in both the ON and OFF states so the trigger will operate properly In general WAIT statements are usually placed at the top of a program so that they will be executed every pass Page 96 9 2010 CPS TALON Solution Partner Delay Methods MOONA SIEMENS Correct Method 100 WAIT 30 FAN1 FAN2 11 110 ON FAN1 Incorrect Incorrect Method 100 ON FAN1 110 WAIT 30 FAN1 FAN2 11 When the WAIT statement is written as it is in this example it will never see the point FAN1 in the OFF state This occurs because line 100 will turn FAN1 ON before line 110 is executed This in effect hides the COV from the WAIT statement Since the WAIT statement will never see the value change it will never trigger the delay Page 97 9 2010 CPS TALON Delay Methods SIEMENS
32. stem Error in a different manner A system s error is simply the difference between the input and the set point Page 113 9 2010 CPS TALON LOOP Statement SIEMENS LOOP type pv cv sp pg ig dg st bias lo hi 0 The Type tells the LOOP statement whether the system is direct acting or reverse acting Type is assigned a value of 0 for direct acting and 128 for reverse acting The PV stands for Process Variable It is the input for the LOOP The LOOP commands the output CV to move the input PV closer to the set point The CV stands for Controlled Variable It is the output for the LOOP The LOOP controls this output in an attempt to move the input closer to the set point The SP is the Set Point for the input PV The LOOP statement adjusts the output CV to move the input closer to the set point SV Page 114 9 2010 CPS TALON Solution Partner LOOP Statement O SIEMENS LOOP type pv cv sp pg ig dg st bias lo hi 0 PG IG and DG stand for Proportional Integral and Derivative Gain These values are used to calculate the LOOP output PG Detects SIZE of error IG SUMMATION of error over time DG Detects RATE OF CHANGE of error Page 115 9 2010 CPS TALON LOOP Statement SIEMENS LOOP type pv cv sp pg ig dg st bias lo hi 0 ST is the sample time of the LOOP Sample time designates how often the LOOP output CV is recalculated Bias is the mid point of the output command range For example if the output
33. strategy Flowcharts use a set of conventitial symbols to visually show how each action or decision leads to the next CPS TALON Solution Partner Flowchart MOONE SIEMENS A Directional Box represents the Flowchart beginning Flowchart end or Continuation to another flowchart section CPS TALON Solution Partner Flowchart Mn Oa SIEMENS The Decision Box is a diamond ia shaped box used to make YES NO decisions ves aes CPS TALON Solution Partner Flowchart Authorized TALON Dealer SIEMENS The Procedure Box is used to a direct commands such as ON OFF and SET AAN lt eront CPS TALON Solution Partner Flowchart Mihara SIEMENS The Input Output Box commands equipment based upon specific calculations a o e CPS TALON i i PPCL Program Development SIEMENS The final step is to enter the PPCL code Since the Decision Table and Flowchart have already been developed the PPCL code can be written more easily Always test your program by comparing its functionality with the Flowchart Decision Table and the Sequence of Operation CPS TALON Solution Partner PPCL User s Manual Authorized TALON Dealer SIEMENS Syntax Section The Syntax section describes command usage and parameters Syntax ON pt7 t16 ptt through pt16 Point names that are commanded to ON ON prior pt1 pt15 prio
34. t Syntax SET value pt7 pt16 First part of the statement is the value you want each point to be Each point must be separated by a comma and up to 16 points can be commanded in one statement Examples 540 SET 10 ETHR1 550 SET 3 CNDVLV HWVLV DAMPER Note Also an assignment can be used to set a point to a single value 560 ETHR2 5 CPS TALON Conditional Statements SIEMENS The IF THEN statement is used to test for a specific condition The condition being tested for is the expression If TRUE then the command after the THEN is executed If FALSE the program does not execute and continues to the next line Expressions are used to compare point values For example compare the value of the Hot Water Pump HWPMP to On or compare the Outside Air Temperature OAT to 72 degrees Expressions are either relational or logical Command section is placed after the THEN and is only executed if the expression evaluated is TRUE CPS TALON Conditional Statements SIEMENS The IF THEN statement Example The expression testing for the point FAN to be ON If the FAN is ON then the expression is TRUE and the command is executed If the FAN is OFF then the expression is FALSE and the Command is ignored The statement would be written as 110 IF FAN EQ ON THEN ON PUMP CPS TALON Point Status Indicators SIEMENS Part of the conditional statements are the point status indicators Point status indica
35. tors are used to compare a point to a specific condition ALARM Used to determine if an alarmable point is in the ALARM state AUTO Used to determine if an LOOAP or LOOAL is in AUTO DAYMOD Used to determine if a equipment controller TEC or PTEC is in DAY mode DEAD Used to determine if the battery in any TALON BACnet field panel is discharged compared to BATT FAILED Used to determine if the operational state of a point or node is FAILED FAST Used to determine if an LFSSL or LFSSP point is in the FAST operational mode HAND Used to determine if a point is being controlled by the manual override switch NGTMOD Used to determine if a equipment controller TEC or PTEC is in NIGHT mode OFF Used to determine if a logical or bundled point is in the OFF state OK Used to determine if the battery in any TALON BACnet field panel is charged compared to BATT ON Used to determine if a logical or bundled point is in the ON state PRFON Used to determine if a bundled point proof has been made SLOW Used to determine if an LFSSL or LFSSP point is in the SLOW operational mode CPS TALON Relational Operators SIEMENS Part of the conditional statements is the relational operator Relational operators establish how factors of the conditional statements are compared EQ the relational operator Equal to is used to check if the first value is equal to the second value Examples FAN EQ ON fan equals
36. uted time based commands LOOP WAIT etc will not function properly Era EEIE TALON Solution Partner GOTO Statement Example 1 Authorized TALON Dealer SIEMENS The GOTO on LINE 10 is executed because the conditional part of the statement is met and then will GOTO Line 100 CPS TALON Solution Partner GOTO Statement Example 2 Authorized TALON Dealer SIEMENS The GOTO on LINE 20 is executed because the conditional part of the statement is met and then it will GOTO Line 100 CPS TALON Solution Partner GOTO Statement Example 3 OOA SIEMENS The GOTO on LINE 50 has no conditional part and every time it is executed it will GOTO Line 200 CPS TALON Solution Partner GOTO Statement Example 3 Authorized TALON Dealer SIEMENS The GOTO on LINE 200 has no conditional part and every time it is executed it will GOTO Line 10 This is the only time a GOTO Statement should be used to GOTO a lower numbered line CPS TALON Solution Partner The DEFINE statement E O OO SIEMENS Creates abbreviated notation for long point names When used in a program a percentage must be placed before and after the abbreviation This statement allows a program logic to be easily duplicated from panel to panel provided structured point names Page 26 9 2010 CPS TALON The DEFINE statement SIEMENS Syntax DEFINE abbrev string abbrev is the a
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