Configurable Parameters - Daikin MicroTech III Installation And Maintenance Manual

Configurable Parameters

Table 3 defines the network parameters of the
Modbus communication module that are available
on the Main Menu_View/Set Unit_Modbus Setup
Table 3: Network Parameters
Parameter
Apply Changes
Network Address
1,2
4800, 9600, 19200, 38400
Baud Rate
1,2
Parity
1
Two Stop Bits
1
Load Resistor
0 - 30000 milliseconds
Response Delay
1
Default: 5 milliseconds
Com LED Timeout
Modbus BSP
Unit Support
1. Parameter must be configured via the unit controller keypad/display.
2. Boldface indicates that the parameter is required for minimum network configuration.
NOTE: If the unit controller application software requires a field upgrade, the network configuration parameters
revert to their default values. Please contact the Chiller Technical Response Center at 540-248-9239
(techresponse@daikinapplied.com) for assistance.
www.DaikinApplied.com
Range/Default Description/Notes
Yes or No
Setting this to Yes cycles power to the unit controller, thus allowing the network setup changes to take
place.
Default: No
1-247
The Modbus Address of the communication module. This must be unique throughout the entire
network.
Default: 1
Data transfer speed (bps) of the Modbus network.
Default: 38400
Even = 0
Odd = 1
Defines the parity (i.e. the use of checksums for detecting transmission errors) that is specified for the
None = 2
bus. This must also be identical for all nodes on the bus.
Defaut: None
Yes or No
This defines the number of stop bits. Yes = 2 stop bits, No = 1 stop bit. Two stop bits are used unless
this parameter is set to No. This value must also be coordinated with the other bus nodes.
Default: Yes
Yes or No
Set this parameter to Yes if this unit is the first or last slave on the segment. If an external terminating
resistor is used, set this parameter to No.
Default: No
When a request is received, the response is delayed by this many milliseconds to avoid over-run of
the master device. In most cases, it is not necessary to change this delay. However, Response Delay
can be adjusted if the master is too slow.
0 - 3600 seconds
If the Com LED Timeout is set to 0, the BUS LED is always green and cannot be used to indicate
communication to the master. If the master does not poll within this time, then the BUS LED turns red.
Default: 3 seconds
Board Support Package - indicates the Modbus communication module firmware version. The
9.18 or newer
Modbus BSP is read-only.
English or Metric
Controls the type of units that are passed through Modbus.
Default: English
menu of the unit controller keypad/display. Change parameters
as required for your network.
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