Modbus Parameter Specifications
Table Of Contents
- Change history
- 1 Protocol frame
- 2 Holding registers
- 2.1 Overview
- 2.2 Reset
- 2.3 Set value
- 2.4 Password
- 2.5 Factory setting Control
- 2.6 Customer setting Control
- 2.7 Operating hours counter
- 2.8 Operating minutes counter
- 2.9 Addressing on/off
- 2.10 Stored set value
- 2.11 Enable RS485
- 2.12 Fan address
- 2.13 Set value source
- 2.14 Preferred running direction
- 2.15 Store set value
- 2.16 Mode of operation
- 2.17 Direction of action
- 2.18 Control parameters
- 2.19 Maximum modulation level
- 2.20 Minimum modulation level
- 2.21 Motor stop enable
- 2.22 Starting modulation level
- 2.23 Maximum permissible modulation level
- 2.24 Minimum permissible modulation level
- 2.25 Maximum speed
- 2.26 Maximum permissible speed
- 2.27 Ramp-up/ramp-down curve
- 2.28 Speed limit
- 2.29 Input characteristic curve
- 2.30 Maximum power
- 2.31 Maximum permissible power
- 2.32 Speed monitoring speed limit
- 2.33 Sensor actual value source
- 2.34 Interface settings
- 2.35 Rotating direction fail-safe mode
- 2.36 Fail-safe set value source
- 2.37 Set value for fail safe function
- 2.38 Time lag fail-safe speed
- 2.39 Cable break detection voltage
- 2.40 Sensor
- 2.41 Enable source
- 2.42 Stored enable RS485
- 2.43 Customer data
- 2.44 Error history
- 2.45 DC-link voltage reference value
- 2.46 DC-link current reference value
- 2.47 Manufacturing data
- 2.48 Air flow reference value
- 2.49 Mass flow reference value
- 2.50 Mirror function for holding registers
- 2.51 Mirror function for input registers
- 2.52 Mass flow calculation
- 3 Input registers
- 3.1 Overview
- 3.2 Identification
- 3.3 Maximum number of bytes
- 3.4 Bus controller software name
- 3.5 Bus controller software version
- 3.6 Commutation controller software name
- 3.7 Commutation controller software version
- 3.8 Actual speed
- 3.9 Motor status
- 3.10 Warning
- 3.11 DC-link voltage
- 3.12 DC-link current
- 3.13 Motor temperature
- 3.14 Temperature inside electronics
- 3.15 Current modulation level
- 3.16 Current set value
- 3.17 Sensor actual values
- 3.18 Enable input state
- 3.19 Current controller function
- 3.20 Current power
- 3.21 Current set value source
- 3.22 Energy consumption counter
- 3.23 Heartbeat
- 3.24 Mirrored input registers
MODBUS ACE V1.00
_______________________________________________________________________________________
ebm-papst Mulfingen GmbH & Co. KG
Bachmühle 2 ·74673 Mulfingen ·Phone: +49 (0) 7938/81-0 ·Fax: +49 (0) 7938/81-110 ·www.ebmpapst.com ·info1@de.ebmpapst.com
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 50 of 78
Form 1003
2.34.4 Interface emergency function:
2 standard settings for the interface are stored in the fan.
The fan briefly switches automatically to these standard settings if faulty telegrams are received (e.g. on
account of different interface settings at the master and slave):
After 10 unsuccessful attempts, the fan automatically communicates with the setting 19200 bits/sec, 8E1
After a further 10 unsuccessful attempts, the fan automatically communicates with the setting 2400
bits/sec, 8E1
Exception: This step is omitted with the configuration 115200 bits/sec.
After another 10 unsuccessful attempts, the fan switches back to the setting stored in the holding
registers "Transmission speed" and "Parity configuration" to avoid inadvertent permanent activation of the
interface emergency function.
In the event of yet more unsuccessful attempts, the interface is no longer automatically switched, i.e. the
interface emergency function can then only be activated by switching the device off and on again or by
way of a software reset
The interface emergency function can only be activated as long as no valid telegram has been detected by the
fan. To ensure that the interface emergency function has been enabled, the device operating voltage should
be switched off and on again beforehand.
Application:
If the interface setting of the fan is not known, it can be determined using an interface emergency function.
Recommended sequence:
Switch on the fan
Set the interface of the master to standard values 19200 bits/sec, 8E1
Read interface setting: XX 03 D1 49 00 02 CS CS
After 10 unsuccessful attempts, the fan automatically communicates with the standard setting of
19200 bits/sec, 8E1. In other words, the above-mentioned command has to be sent 11 times before
a response is sent by the fan.
The interface setting of the fan can be determined from the fan response.
The master and slave interface settings can then be matched to one another.
Note:
The fan should not be permanently operated in the interface emergency function, as the values defined in the
parameters "Transmission speed" and "Parity configuration" are activated again after every "Reset" or
"Transfer parameter".
The master and fan interface settings must always be matched to one another.