User Guide
Table Of Contents
- Table of Contents
- How to Use This Manual
- Chapter 1–Program Methodology
- Overview
- Introduction to PPCL
- PPCL Rules
- PPCL Program Design Guidelines
- Relational Operators
- Logical Operators
- Arithmetic Operators
- Arithmetic Functions
- Special Functions
- Order of Precedence
- Resident Points
- Local Variables
- Point Priority Overview
- At (@) Priority Status Indicators
- Point Status Indicators
- Converting a Sequence of Operation intoProgram Code
- Chapter 2–Control OptionComparisons
- Chapter 3–Command Syntax
- Overview
- ACT (Activate lines)
- ADAPTM (Adaptive control, multiple)
- ADAPTS (Adaptive control, single)
- ALARM (Alarm state)
- AUTO (Auto status)
- DAY (Day mode)
- DBSWIT (Dead band switch)
- DC (Duty cycle)
- DCR (Duty cycle routine)
- DEACT (Deactivate lines)
- DEFINE (Define abbreviation)
- DISABL (Disable lines)
- DISALM (Disable alarm)
- DISCOV (Disable COV)
- DPHONE (Disable phone)
- EMAUTO (Emergency, Auto status)
- EMFAST (Emergency, Fast status)
- EMOFF (Emergency, Off status)
- EMON (Emergency, On status)
- EMSET (Emergency, set value)
- EMSLOW (Emergency, Slow status)
- ENABLE (Enable lines)
- ENALM (Enable alarm)
- ENCOV (Enable COV)
- EPHONE (Enable phone)
- FAST (Fast status)
- GOSUB (Go to subroutine)
- GOTO (Go to line)
- HLIMIT (High limit)
- HOLIDA (Holiday)
- IF/THEN and IF/THEN/ELSE (Conditional control)
- INITTO (Initialize totalized value)
- LLIMIT (Low limit)
- LOCAL (Local variable)
- LOOP (Loop control)
- MAX (Maximum value)
- MIN (Minimum value)
- NIGHT (Night mode)
- NORMAL (Normal operating mode)
- OFF (Off status)
- OIP (Operator interface program)
- ON (On status)
- ONPWRT (On after power return)
- PDL (Peak demand limiting)
- PDLDAT (PDL, define load attributes)
- PDLDPG (PDL, digital point group)
- PDLMTR (PDL, meter monitor)
- PDLSET (PDL, setpoints)
- RELEAS (Release)
- RETURN (Return/end subroutine)
- SAMPLE (Sample a statement)
- SET (Set point value)
- SLOW (Slow status)
- SSTO (Start/stop time optimization)
- SSTOCO (SSTO coefficients)
- STATE (State text command)
- TABLE (Table of coordinates)
- TIMAVG (Average over time)
- TOD (Time of day, digital points)
- TODMOD (TOD modes)
- TODSET (Time of day, analog points)
- WAIT (Wait time)
- Overview
- Glossary
- Appendix A—PPCL Reserved WordList
- Index
Program Methodology—Logical Operators
Siemens Building Technologies, Inc. 1-21
Exclusive Or (.XOR.)
Unitary pre-APOGEE APOGEE BACnet
Syntax
if (cond1.XOR.cond2) then...
cond1,
cond2
Defines a condition that is the result of a comparison
between two values.
Use
• Used to compare two logical conditions.
• If cond1 is true and cond2 is false, the result of the statement is
true. If cond1 is false and cond2 is true, this statement is also
true.
• A single statement can incorporate a combined total of 16
relational and logical operators.
See Table 1-3 for a comparison of conditions used with the .XOR.
logical operator:
Table 1-3. Truth Table for .XOR. Logical Operator.
Condition 1 False Condition 1 True
Condition 2 False
Result is False Result is True
Condition 2 True
Result is True Result is False
Example
200 IF (PMP1.EQ.ON.XOR.PMP2.EQ.ON) THEN NORMAL(PMPALM)
APOGEE PPCL User’s Manual
1-22 Siemens Building Technologies, Inc.
Arithmetic Operators
Arithmetic operators are mathematic functions that are performed on
two or more numbers (operands). When used in PPCL, the result of
a calculation is determined and assigned to a point name or local
variable for future reference. For information on the order in which
arithmetic operators are evaluated, see the Order of Precedence
section in this chapter.
NOTE: A maximum of 15 arithmetic operators can be used in
one PPCL program line.
PPCL supports the following arithmetic operators:
• Addition (+)
• Assignment (=)
• Division (/)
• Multiplication (*)
• Subtraction (-)
Each arithmetic operator is described in more detail on the following
pages.