Modbus Parameter Specifications

MODBUS ACE V1.00
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ebm-papst Mulfingen GmbH & Co. KG
Bachmühle 2 ·74673 Mulfingen ·Phone: [phone] ·Fax: [phone] ·www.ebmpapst.com ·[e-mail]
DocNo.: 634505DocNo: 446144DocNo.:358982DocNo.:322523DocNo.:309753DocNo.:303997DocNo.:276241DocNo.:256078DocNo.:196392 ·Template: 2 dated 10/6/2003 ·File: ext001931381.docx ·Last printed 9/30/2019 10:29:00
AM ·Page 15 of 78
Form 1003
1.3.6 Commands with addressing by serial number
These commands additionally use the serial numbers of the fans for addressing:
An identifier for the serial number of the fan (6 bytes) is transmitted in the data area of the commands.
Only the fan with the MODBUS address and serial number specified in the command reacts to the command
and responds.
The command with addressing by serial number is obtained from the standard command by inserting an
identifier for the serial number after the command byte.
Serial number format:
ebm-papst allocates an individual serial number for each fan. The part which customers can read out is made
up of the date of manufacture and the consecutive number. Addressing is also possible with this. Should any
unexpected problems arise, please inform us accordingly.
Format: YYWW00XXXX
YY : Year of manufacture
WW : Week of manufacture
00 : Fixed value 00
XXXX : Consecutive number
The first 4 characters contain the date of manufacture (year / week).
The number XXXX starts running at zero at the start of each week of manufacture and is incremented by 1
for each fan. Each character can assume values from 0-9 and from A-Z. This yields a maximum encodable
number of 36 characters per position, i.e. 36
4
= 1 679 616 devices / week
Example:
ebm-papst serial number: 09230012GY
Year of manufacture: 09 (2009)
Week of manufacture: 23 (23)
Consecutive no.: 12GY (49525)
The year and week of manufacture are each coded as a hex value in the command.
Each character of the consecutive no. is coded as an ASCII value.
In commands with addressing by serial number the serial number must be specified as follows:
Byte no. Meaning Example Corresponds to holding register
Byte 0: [Address]
Byte 1: [Command code]
Byte 2: Year of manufacture 0x09 (-> 2009) D1A4 MSB
Byte 3: Week of manufacture 0x17 (-> 23) D1A4 LSB
Byte 4: Consecutive no. 1st character 0x31 (-> 1) D1A3 MSB
Byte 5: Consecutive no. 2nd character 0x32 (-> 2) D1A3 LSB
Byte 6: Consecutive no. 3rd character 0x47 (-> G) D1A2 MSB
Byte 7: Consecutive no. 4th character 0x59 (-> Y) D1A2 LSB
This sequence differs from the one in which the serial number is stored in the holding registers D1A2 - D1A4.