ProSoft Technology PS69-DPM User Manual page 106

Contents
User Manual
6.1.2 PROFIBUS Interface
Isolated RS-485 interface per EN 50170.
3
5
6
8
Please ensure that termination resistors are available at both ends of the cable. If special
PROFIBUS connectors are being used, these resistors are often found inside the connector
and must be switched on. For baud rates above 1.5 MBaud use only PROFIBUS
connectors, which also include additional inductance. It is not permitted to have T stubs at
high baud rates.
Use only a special cable which is approved for PROFIBUS-DP. Make a solid connection
from the cable shield to ground at every device and make sure that there is no potential
difference between the grounds at the devices.
If the PS69 is linked with only one other device on the bus, both devices must be at the ends
of the bus line. The reason is that these devices must deliver the power supply for the
termination resistors. Otherwise the Master can be connected at any desired position.
6.1.3 Functional Specifications
Specification
Slaves
Input/Output
Input Data
Acyclic Data
Status data
Output data
Command data
DPV1 services
Services
Sync, Freeze Command
Up to 32 PROFIBUS devices can be connected to one bus segment. If several bus
segments are linked to each other with repeaters, there can be up to 127 devices on the
network.
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RxD/TxD-P Receive/Send Data-P respectively connection B plug
DGND Reference potential
VP Positive power supply
RxD/TxD-N Receive/Send Data-N respectively connection A plug
Description
max. 125
max. 244 Bytes per Slave
max. 408 Bytes (*)
DPV1
88 Bytes
max. 480 Bytes (*)
16 Bytes
Read / Write class 1, Alarm
Global-Control, Slave-Diag, Set-Parameter
supported
PS69-DPM ♦ CompactLogix or MicroLogix Platform
PROFIBUS DPV1 Master
ProSoft Technology, Inc.
October 1, 2014