Table 99 Spp Inputs And Current State; Table 100 Restart Scenario Options - Honeywell HC900 Reference Manual

Function Blocks
SPP Function Block
• "Fastforward" (i.e. Verify) is initiated through the operator interface. It is not an input pin.
Fastforward is a way to check for proper functioning of the profile's events and outputs,
without having to wait for the profile to execute at its normal speed. When FASTFORWARD
is ON, the program will run at a speed 60 times faster. When FASTFORWARD is OFF, the
program will run at normal speed.
Input
RESET
RESET
RESET
HOLD
HOLD
RUN
RUN
RESET
GHOLD
Restart scenario options
No Action taken
1
Use the Restart feature of the Setpoint
2
Programmer with a configurable Ramp
Rate.
Use the Restart feature of the Setpoint
3
Programmer with a configurable Ramp
Rate and use a compare function so that
the restart will apply only after a certain
time.
ATTENTION
Be sure to configure the Restart Ramp Rate when a controlled restart is being configured. If
not the default value of 0 will cause the programmer to freeze.
346

Table 99 SPP inputs and current state

HOLD
RESET
HOLD
RUN
HOLD

Table 100 Restart scenario options

Program will start at the point where it was prior to power
down.
This feature will use the PV (connected to PV1) as the initial
starting point for the Setpoint and will use a configurable
ramp rate for the profile. When the temperature gets to the
original Setpoint prior to power down, the program will
continue. See
You may gate this Restart input to the programmer to only
apply after a certain time off and/or a certain segment if
desired using Compare function blocks. See
Scenario B.
HC900 Hybrid Control Designer Function Block Reference Guide
Current State
RUN GHOLD
RUN RESET
HOLD HOLD
RUN GHOLD
GHOLD GHOLD
F igure 100, Scenario A.
H
STOP
RESET
STOP
STOP
STOP
F igure 100,
H
Revision 11
2/07