Danfoss MCX08M

DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2
Produced by Danfoss Electronics spa Graphic Department, 10-2009
60
Danfoss Electronics spa
Air Handling seq. - user manual
16| Modbus Communication
The communication protocol supported by the RS485 network is the Modbus RTU slave
MODBUS COMMUNICATION
GEN General Min Max Default U.M. Text value
SEr Modbus
SEr Modbus address 1 254 1
bAU Baudrate 1 9 192 ;0;12;24;48;96;144;192;288;384
COM Settings 1 3 8N1 ;8N1;8E1;8N2
Tab 41_ [Modbus Communication - Modbus Communication]
The following communications settings can be set:
SEr - Serial address (Modbus and CAN)
Serial node address setting, valid both for the Modbus and CAN networks. Each node on the network must have an
unequivocal address
bAU – Serial Baudrate (Modbus)
bAU=0. communication disabled
bAU=12. baudrate=1200 baud
bAU=24. baudrate=2400 baud
bAU=48. baudrate=4800 baud
bAU=96. baudrate=9600 baud
bAU=144. baudrate=1440 baud
bAU=192. baudrate=19200 baud (default value)
bAU=288. baudrate=28800 baud
bAU=384. baudrate=38400 baud
COM – Serial settings
COM=8N1. 8 data bits, no parity, 1 stop bit
COM=8E1. 8 data bits, parity even, 1 stop bit
COM=8N2. 8 data bits, no parity, 2 stop bits
The exported variables are of the “Holding Register” or “Coil” type.
16.1| Table of exported variables
TABLE OF EXPORTED VARIABILES 1
Code Description Notes R/W Coil Address
Digital input
Not Used 1
ASF SupFan Alarm SupFan Alarm R 2
SSS SupFan SafeSW Supply Fan safety switch (port open) R 3
ASR RetFan Alarm Return Fan alarm R 4
CSR MixDamp Closed Mixing Damper closed R 5
SSR RetFan SafeSW Return Fan safety switch R 6
CSE ExtDamp Closed External Damper closed R 7
ONF ON/OFF ON/OFF R 8
AFI Fire Alarm Fire alarm R 9
AAI Freeze Alarm Freeze alarm R 10
CH Summer/Winter Summer/Winter selection R 11
SFW Supply Flow Supply ow alarm R 12
»
»
»
»
»
»
»
»
»
»
»
»