ACH550 User’s Manual
35
Application Macros
Overview
Macros change a group of parameters to new, predefined values designed for
specific applications. Use macros to minimize the need for manual editing of
parameters. Selecting a macro sets all other parameters to their default values,
except:
•
Group 99: Start-up Data parameters
•
The
PARAMETER
LOCK
1602
•
The
PARAM
SAVE
1607
•
Groups 50…52 serial communication parameters
•
Group 29: Maintenance triggers
After selecting a macro, additional parameter changes can be made manually using
the control panel.
Application macros are enabled by setting the value for parameter 9902
APPLIC
MACRO
. By default, HVAC default (value 1) is the enabled macro.
General Considerations
The following considerations apply for all macros:
•
When using a direct speed reference in AUTO mode, connect the speed
reference to analog input 1 (AI1), and provide the START command using digital
input 1 (DI1). In HAND/OFF mode, the control panel provides the speed
reference and START command.
•
When using process PID, connect the feedback signal to analog input 2 (AI2). As
a default, the control panel sets the Setpoint, but analog input 1 can be used as
an alternate source. You can set up process PID using parameters (Group 40) or
using the PID control assistant (recommended).
Application / Macro Listing
This section describes the following macros:
9902
Value
Macro
9902
Value
Macro
1
HVAC default
8
Internal timer
2
Supply fan
9
Internal timer with constant speeds
3
Return fan
10
Floating point
4
Cooling tower fan
11
Dual setpoint PID
5
Condenser
12
Dual setpoint PID with constant speeds
6
Booster pump
13
E-bypass
7
Pump alternation
14
Hand Control
