5
RG-MHBAC
Drive Setup & Programming
3.3 Modified Parameters and Selections
24 AUTO SOURCE
The default selection for this parameter has been changed to KEYPAD. Refer to
Section 3.4 Serial Communications Setup for more information.
32 HZ MULTIPLIER The default setting for this parameter has been changed to 30.00. Refer to Section
3.4 Serial Communications Setup for more information.
56 SERIAL LOSS
The selections for this parameter are FAULT (default) and PRESET#3. The functionality
of this parameter is described in detail in Section 3.4 Serial Communications Setup.
57 SERIAL
The default selection for this parameter has been changed to WITH TIMER to provide
limited “out-of-thebox” serial communication with the drive.
58 MAC ADDRESS
This parameter has been renamed to be consistent with BACnet nomenclature. The
minimum and maximum values for this parameter have also been changed to 0
and 254, respectively, in accordance with ANSI/ ASHRAE Standard 135-2001. The
default value is 128. Refer to Section 3.4 for more information.
3.4 Serial Communication Setup
The factory default values of the drive parameters have been set to allow the monitoring of all MCH BACnet
points. Write commands will not be accepted without proper modification to these drive settings. One
exception to this is STOP commands, which are always accepted over the LAN. For serial start and/or serial
speed and setpoint control, modify the setting of Drive Parameter #30 (Control). The drive parameters that
are required for serial communications, including Drive Parameter #30, are described herein.
24 AUTO SOURCE
This parameter must be set to KEYPAD for the drive speed or setpoint to be modified
over the LAN.
30 CONTROL
This parameter should be set to accommodate the specific application intent:
NORMAL
Serial start and serial speed/setpoint commands are invalid.
NORM NO HAND Same as NORMAL except the HAND/OFF/AUTO, herein referred to
as H/O/A, is limited to settings of OFF and AUTO.
SERIAL SPEED
Serial start commands are invalid. Serial speed/setpoint
commands are valid in AUTO H/O/A.
S SPD/NO HAND Same as SERIAL SPEED except H/O/A is limited to settings of OFF
and AUTO.
SERIAL AUTO
Serial start and serial speed/setpoint commands are all valid in
AUTO H/O/A. This setting forces the drive to be started over the
LAN when in AUTO H/O/A.
S AUTO/NO HND Same as SERIAL AUTO except H/O/A is limited to settings of OFF
and AUTO.
Serial STOP commands are accepted over the LAN regardless of this parameter setting.
