Honeywell HC900 - Table 126 Up;Down Configuration Parameters; Figure 118 UPDN Function Block Example

Function Blocks
UPDN Up/Down Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 427
2/07
Configuration parameters
Table 126 Up/down configuration parameters
Properties Group Parameter Index # Parameter Description Value or Selection
Presets
Local
Preset
0 Local Preset 1 to 99999
Use Remote Preset
1 On selects remote preset Click on Box to select
Example
HFigure 118 shows a Function Block Diagram using a UPDN function block. This example uses a Totalizer
function block as a retentive timer. If a fixed input of 1 is provided to the block using a Numeric Constant,
the totalizer will time up to 1 at the input rate selected (per sec, per min., per hr, or per day). For example,
if the “per hr” rate were selected, the output would be 1.0 after 1 hour, 2.0 after 2 hours, etc, up to the
Preset value.
A counter is shown to count the number of pump cycles (On to OFF transitions).
The P4-RESET Digital Variable is used to reset the timer and counter
Figure 118 UPDN function block example