Control Word; Status Word; Planning - Daikin MD5 Operation Manual

Control Word

The CONTROL WORD is the principal means for controlling
the drive from a fieldbus system. The fieldbus controller
sends the CONTROL WORD to the drive . The drive switches
between states according to the bit-coded instructions in the
CONTROL WORD . Using the CONTROL WORD requires that:
• The drive is in remote (REM) control .
• The serial communication channel is defined as the
source for controlling commands from EXT1 (set using
parameters 1001 EXT1 COMMANDS and 1102 EXT1/
EXT2 SEL) .
• The external plug-in fieldbus adapter is activated:
— Parameter 9802 COMM PROT SEL = 4 (EXT FBA) .
— The external plug-in fieldbus adapter is configured to
use the drive profile mode or drive profile objects.
The content of the CONTROL WORD depends on the protocol/
profile used. See the user's manual provided with the FBA
module and/or the Daikin drives profile technical data.

Status Word

The STATUS WORD is a 16-bit word containing status
information, sent by the drive to the fieldbus controller. The
content of the STATUS WORD depends on the protocol/profile
used . See the user's manual provided with the FBA module
and/or the Daikin drives profile technical data section.
Reference
The contents of each REFERENCE word:
• Can be used, as speed or frequency reference .
• Is a 16-bit word comprised of a sign bit and a 15-bit
integer .
• Negative references (indicating reversed rotation
direction) are indicated by the two's complement of the
corresponding positive reference value .
The use of a second reference (REF2) is supported only when
a protocol is configured for the Daikin Drives profile.
Reference scaling is fieldbus type specific. See the user's
manual provided with the FBA module and/or the following
sections as appropriate:
• Daikin drives profile technical data
• Generic profile technical data
OM 1191 • MD5 VFD
Actual Values
Actual Values are 16-bit words containing information on
selected operations of the drive . Drive Actual Values (for
example, group 01 parameters) can be mapped to Input Words
using group 51 parameters (protocol-dependent, but typically
parameters 5104...5126) .
NOTE: This is not required with MicroTech III controls .

Planning

Network planning should address the following questions:
• What types and quantities of devices must be connected
to the network?
• What control information must be sent down to the
drives?
• What feedback information must be sent from the drives
to the controlling system?
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