Honeywell HC900 - Figure 82 RAMP Function Block Example

Function Blocks
RAMP Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 315
2/07
Example
HFigure 82 shows a function block diagram using RAMP function blocks. In the example, if Stage 3 is ON
and all others are OFF, the output to the device will equal to the third scale of Ramp 1. If Stages 3 and 8 are
ON, then the output to the device will equal the fourth scale of Ramp #2.
Analog
Input
Request from Stage 1
Request from Stage 2
Request from Stage 3
Request from Stage 4
forcing logic
forcing logic
forcing logic
forcing logic
Constant (1 = high, 0 = low)
Constant = 0
Request from Stage 5
Request from Stage 6
Request from Stage 7
Request from Stage 8
forcing logic
forcing logic
forcing logic
forcing logic
Constant (1 = high, 0 = low)
RAMP #1
default
enable#1
enable#2
enable#3
force_hi
disable
OUT
PV
enable#4
force#1
force#2
force#3
force#4
RAMP #2
default
enable#1
enable#2
enable#3
force_hi
disable
OUT
PV
enable#4
force#1
force#2
force#3
force#4
AO
Analog Output
to Variable
Speed Drive
Figure 82 RAMP function block example