Honeywell HC900 Reference Manual page 359

READY = Program Reset state indication
= Program Hold state indication
HOLDI
= Program Run state indication
RUNI
= Program Stop indication (Program Complete)
STOPI
= Current Profile Number (1 to 99) - connect to PGM input on SPEV block.
PGM
= Current Segment Number (1 to 50) - connect to SEG input on SPEV block.
SEG
= Current program state (RESET, HOLD, RUN, GHOLD, STOP). Connected to STA input of
STA
the SPEV block
ATTENTION
The program states are:
• 0 = Until block is first executed after power up
• 1 = Reset
• 2 = Run
• 3 = Hold
• 4 = GHold
• 5 = Stop
• 6 = Disabled
TIP
• If the first step of a profile is a ramp, the program will start the ramp from the value of PV
Input 1. If the first step of a profile is a soak, the program will start from the soak value. If
consistent starting values are required, begin all profiles with a soak.
• The PV inputs are used to determine PV–SP deviation for guaranteed soak segments.
• Valid program numbers begin with 1. Valid segment numbers begin with 1.
• The GHOLD output is not affected by the status of the GHOLD input.
• The RST, HLD, RUN, JOG, ADV, SET, RESTART inputs are activated only when the
respective input changes from OFF to ON. A maintained ON input has no different affect
than a pulsed ON input (that is, it has no effect until it turns OFF and then back ON again).
• The program may be changed (with some exceptions) from the current state to a new state
by the operator as well as by inputs to the SPP block.
• Concerning changing program state, if more than one function block input is on in the same
execution cycle, RESET has priority over HOLD and RUN, and GHOLD has priority over
RUN.
• Also, function block inputs will override inputs from the Operator Panel that occur during the
same execution cycle. And finally, state changes from the Operator Panel are processed on
the basis of the "last change wins."
• At the beginning of a segment, STME will be 0 for one execution cycle to permit start of
segment detection by other blocks.
• At the end of a segment, STMR will be 0 for one execution cycle to permit end of segment
detection by other blocks.
• If RESTART is On, the block will use PV1 as a starting value and ramp at Restart Rate back
to the last SP value, then complete the remaining portion of the segment. Restart Rate is a
property of the profile (program)
Revision 11
2/07
HC900 Hybrid Control Designer Function Block Reference Guide
Function Blocks
SPP Function Block
T able 99 lists the resulting states.
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