RG-MHBAC
4
Drive Setup & Programming
3
Drive Setup and Programming
Most drive parameters (including those required for serial communications) are not accessible through the
LAN. They can only be accessed by entering the Programming Mode of the drive itself. Refer to the MCH
Installation and Operation Manual (MH01) for more information. The parameter information in manual MH01
is based on the standard MCH Series Modbus™ Drive. The differences between the drive programming
parameters described in the manual and those that exist in the MCH Series BACnet® Drive are explained
in sections 3.1-3.3 herein.
3.1 Added Programming Parameters
60 SERIAL TIMEOUT This parameter makes the serial watchdog timeout period selectable. (Section 3.4)
85 DEVICE NUM EX This parameter is used to extend the device number to its full 22-bit range of
0 to 4194303. If the device number of the drive exceeds a value of 65535, this
parameter should be set to the value of bits 16-22 of the device number. Otherwise
this parameter should be set to 0.
86 DEVICE NUMBER This parameter holds the value of bits 0-15 of the drive’s 22-bit device number. It
can be used by itself to represent a device number in the range of 0 to 65535. If the
device number exceeds 65535, then DEVICE NUM EX must also be used.
Example:
The device number is 124 (00007Ch). The value of bits 16-22 (DEVICE NUM EX) is
00h or 0. The value of bits 0-15 (DEVICE NUMBER) is 007Ch or 124.
Example:
The device number is set to its default value of 1240000 (12EBC0h). The value of
bits 16-22 (DEVICE NUM EX) is 12h or 18. The value of bits 0-15 (DEVICE NUMBER)
is EBC0h or 60352.
NOTE
The values of the DEVICE NUMBER and DEVICE NUM EX parameters are also appended to the
object name of the drive to ensure that it is unique network-wide.
Example:
If the device number of the drive is set to its default value of 1240000 (12EBC0h),
the resulting object name for the device will be ‘AC Tech VFD 18-60352’.
3.2 Omitted Parameters and Selections
36 SLEEP THRESHOLD
Sleep Mode functionality has not been added to the MCH Series BACnet®
drive so these drive parameters do not exist.
37 SLEEP DELAY
38 SLEEP BANDWIDTH
41 ANALOG INPUT FILTER
52 TB14 OUT
The following options have not been added to these parameters in the MCH
Series BACnet® drive:
53 TB15 OUT
54 RELAY
INV MIN/MAX A
MIN ALARM
INV MIN ALARM
MAX ALARM
INV MAX ALARM
