MODBUS LITE V5.01 parameter specification

MODBUS parameters "ebm-papst series 84 / 112 / 150 / 200"
_______________________________________________________________________________________
ebm-papst Mulfingen GmbH & Co. KG
Bachmühle 2 ·74673 Mulfingen, Germany ·Phone: [phone] ·Fax: [phone] ·www.ebmpapst.com ·[e-mail]
DocNo.: 634505DocNo.: 446144DocNo.:358982DocNo.:322523DocNo.:309753DocNo.:303997DocNo.:276241DocNo.:256078DocNo.:196392 ·Template: 2 dated 6 October 2003 ·File: ext001157859.doc ·Last printed 10/03/2015 15:13:00
·Page 49 of 70
Form 1003
Note:
If parity configuration 8N1 is selected, the unit will no longer correspond to the "MODBUS over Serial Line
Specification & Implementation Guide V1.0" as this specifies a mandatory frame size of 11 bits.
Make sure that the same parity configuration is selected for the fan as it is for the master (e.g. EC Control).
Otherwise, communication with the fan will not be possible!
If the value set by the customer (holding register D249) or the factory default setting (holding register D2C9)
differ from the value selected here, ensure that the parity configuration is also changed after data transfer from
the customer setting or factory default setting (see 2.5 and 2.6). No communication is then possible with the
previous setting.
2.32.3 Procedure for changing the interface settings
If the parameters "Transmission rate" and "Parity configuration" do not correspond to the interface setting in
the master (e.g. EC Control), no communication will be possible.
If the settings are different, the interface settings will not be checked by the fan, i.e. the interface settings of
the fan MUST be known.
To prevent complications caused by interfaces with different settings, it is advisable to leave the interface
settings at the preset values:
Transmission rate: : 19,200 bit/sec (0x04)
Parity configuration : 8E1 (0x00)
If a change is necessary, take care to ensure that the master and fan have the same settings at all times
to guarantee error-free communications.
The new interface settings for the fan will only be adopted after an appropriate command on the "Reset"
parameter (Adopt parameter or Reset) - see 2.2 - or when the unit is switched off ("Power off"). Until then,
the fan will continue working with the previous settings.
Recommended procedure for changing the interface settings, for example when changing from 19,200 bit/sec,
8E1 to 38,400 bit/sec, 8N2:
 Interface settings at the master must initially be 19,200 bit/sec, 8E1.
 Write password: XX 10 D0 02 00 03 06 PP PP PP PP PP PP CS CS
(changing the interface settings requires at least "Customer" authorisation)
 Write the transmission speed with the value 38,400 bit/sec: XX 06 D1 49 00 05 CS CS
 Write the parity configuration with the value 8N2: XX 06 D1 4A 00 02 CS CS
 Trigger Adopt parameters: XX 06 D0 00 00 02 CS CS
 After the fan has confirmed the command, it will work with the new setting.
 Change the interface setting in the master: 38,400 bit/sec, 8N2
XX ................... Fan address
PP ................... Password
CS ................... CRC checksum