SEW EURODRIVE DFP21B bus interface

Pin 3: RxD/TxD-P (positive data)

Pin 8: RxD/TxD-N (data negative)

Pin 5: DGND (reference ground)

Pin 4: CNTR-P (TTL control signal for repeater)

Cable requirements: Use shielded twisted pair cables (type A), with large areas of grounding at both ends of the shielding layer. When the bus length is long or the ground potential fluctuates, it is necessary to make equipotential connections.

Bus terminal: DFP21B itself does not have a terminal resistor. When it is located at the beginning or end of the PROFIBUS segment, a PROFIBUS connector with an integrated terminal resistor must be used and a resistance switch must be turned on.

2.5 Station Address Setting

Station address through DIP switch

two0

two0

to two six

two six

Set within the range of 1 to 125. The default address is 4（two two=four two two=4) . After the address change, it needs to be powered off and restarted to take effect. The current address can be read through parameter P093 (fieldbus address).

Example: Set address 17 → Switch position:

two 0

=one two 0

=1 (1)twofour

=one two four=1 (16), the rest are 0.

2.6 LED Status Indicator Light

Meaning of LED color status

RUN green constant light bus hardware is normal

RUN green flashing 2 Hz address>125 or=0

RUN green off hardware malfunction

BUS FAULT is constantly red and disconnected from the DP master station, with no detected baud rate

BUS FAULT flashing red detected baud rate but not addressed by the master station (configuration error)

BUS FAULT red off, data exchange is normal

H1 (gateway) red constant light system error (not configured or offline driver)

H1 (gateway) flashing red bus scanning in progress

H1 (gateway) red off, SBus normal

Project Planning and GSD Documents

3.1 GSD file selection

Usage scenario GSD file identifier description

MOVIDRIVE ®  MDX61B (standard DP) SEW_6003.GSD MOVIDRIVE ®+ DFP21 DP-V0， No DP-V1 parameter channel

MOVIDRIVE ®  MDX61B（DP-V1） SEWA6003.GSD MOVIDRIVE ®- DFP21B supports DP-V1 parameter service

Gateway mode (MOVITRAC) ®/ UOH11B) SEW_6009.GSD DFP21B Gateway for SBus Multi Slave Gateway

Attention: GSD files cannot be modified, otherwise SEW will not be held responsible. The latest version can be downloaded from the SEW official website.

3.2 Project Planning Steps (Taking STEP7 as an Example)

Copy the GSD file to STEP7 .. S7DATA GSD directory.

Add DFP21B slave station in hardware configuration and set PROFIBUS address.

Select the required process data configuration (see table below).

Allocate I/O addresses (note: when the data length is ≥ 3 bytes, SFC14/15 must be used to ensure consistency).

Compiling and downloading, if the BUS FAULT LED turns off, it indicates successful configuration.

3.3 MOVIDRIVE ®  DP configuration options

Process Data Configuration DP Configuration Code Description

1 PD F0 hex 1 process data word (control word/status word)

2 PD F1 hex 2 words (+speed)

3 PD F2 hex 3 words (+slope)

6 PD 00 hex, F5 hex 6 words (PD4~PD6 only used for IPOSplus) ®）

10 PD 00 hex, F9 hex 10 words

Param+1 PD F3 hex, F0 hex 8-byte parameter channel+1 PD word

Param+2 PD F3 hex, F1 hex parameter channel+2 PD

Param+3 PD F3 hex, F2 hex parameter channel+3 PD

Param+6 PD F3 hex, F5 hex parameter channel+6 PD

Param+10 PD F3 hex, F9 hex parameter channel+10 PD

General module configuration: If you need to customize the number of PDs (4, 5, 7, 8, 9), you can choose "Universal Module", but you must ensure that the input/output word count is equal, and module 0 is fixed to 0x00. Module 1 is the parameter channel (0x00 means disabled, 0x00 0x87 0x87 means enabled 8 bytes), and subsequent modules are PD data.

3.4 Configuration of Gateway Mode (SEW_6009. GSD)

In gateway mode, the DP master station communicates with DFP21B, which then exchanges data with up to 8 frequency converters through SBus. Each frequency converter occupies 3 process data words (PO1~PO3, PI1~PI3). The configuration options include:

ONE module for all drivers: All drivers' PDs are concentrated in a consistent data block (length=3 x n words).

ONE module per drive: Each driver has a separate consistent data block (for ease of programming).

The process data configuration table can be found on page 37 of the manual, supporting 1-8 drivers (3-24 PD).

3.5 AutoSetup (Gateway Automatic Setup)

After activating the AutoSetup DIP switch, DFP21B automatically scans the frequency converters (addresses 1-8) on the SBus and assigns 3 PD words to each detected device. This function only needs to be executed once (the switch remains ON). If you want to change the allocation of equipment or process data on SBus, you need to switch AutoSetup again.

Variable frequency drive parameter settings

4.1 MOVIDRIVE ®  MDX61B

P100 (Setpoint Source)=FILDBUS

P101 (control signal source)=FILDBUS

P819 (fieldbus timeout): configured by the DP master station and cannot be changed through the keyboard.

P831 (fieldbus timeout response): Optional options include "quick stop/warning", "emergency stop/fault", etc.

Note: Even if fieldbus control is used, for safety reasons, the frequency converter still needs to be enabled through terminals (DI00 "/Controller inhibit" connected to+24V, DI01~DI03 can be set to "no function").