the selected position via schedules and programs. Contact closure
with contacts rated at a minimum of 1 ampere at 24 volts shall be
1.
Enable-Disable.
2.
Start-Stop.
3.
On-Off.
4.
Open-Close.
5.
Demand Limit
6.
Temperature Reset.
7.
Boiler Selection
8.
Floating Control.
2.6.20.3
Program Storage
CMS controller shall be able to store programs on a solid state memory PC
card, a hard disk drive, or a CD-RW reader-writer-rewriter disk drive
requiring no front end computer for the data conversion.
2.6.21
System Software
CMS controller program code shall be documented sufficiently that operator
can modify controller logic and setpoints. Software provided shall
include, but not be limited to, operating systems, communication control,
definition of process, operator interface, and system services. Provide
Read Only Memory [ROM] and Programmable Read Only Memory [PROM]as required,
as resident operating system. Application software shall be RAM resident.
interactive on-line mode, but may be added for extended data storage.
2.6.21.1
Trend Logging.
Operator shall be able to initiate a custom log for any variable value in
the control program. Operator shall select type of log, number of values
log shall contain, and time interval between values. Trend log activation
period shall be assignable from keypad by day, month, year, and time span
desired for each log.
2.6.21.2
Alarm Reporting.
Control system shall be capable of analyzing any variable in the program
and evaluating for alarm condition. Alarm can be generated based on analog
value out of limits or based on a programmed sequence of events. System
shall store alarms in log upon each occurrence and shall be capable of
reporting them immediately.
2.6.21.3
Alarm Lockout Routine.
Alarm lockout routine shall be provided to inhibit nuisance alarms.
SECTION 15561A
Page 69