NORD Drivesystems BU0220 - Manual (Page 88)

PROFIBUS DP – Supplementary manualfor NORD Frequency Inverter SK 2xxE
88 Subject to technical amendments BU 0220 GB-0912
8.3.3.2 PROFIBUS DP-V1
Amongst other things, DP-V1 contains additions for process automation and a series of event-related
functions, in particular acyclic data traffic.

Acyclic exchange of process data for parameterisation, operation, observation and alarm processing of
intelligent field devices in parallel with the cyclic reference data traffic.

Diagnostic functions, status alarm, update alarm and alarm processing specific to the manufacturer.

Exchange of data during the DP slave initialisation phase

DP-Master Class 2 - Communication (Section 8.3.2 "Device types" - E.g.: touch panel)

DP master - master communication (between masters)
Acyclic data traffic, which is made possible by DP-V1 allows the parameterisation and calibration of the
connected field devices simultaneously to the cyclic exchange of data.For this, a four-word I/O module is used,
which corresponds to the Parameter Label Value (PKW) section of PPO types 1 and 2 (see also Section 7.2
"PROFIBUS DP PPO types").
Up to 4 frequency inverters connected via a BUS technology unit can be managed independently from the
master via this channel. A DP master Class 1 (DPM1, e.g. PLC or PC) can simultaneously access up to three
DP master Class 2 (DPM2, engineering, planning or control devices) in parallel to a technology unit.
Requirements by more complex applications and devices (field devices for process automation, intelligent
operating and observations devices, frequency inverters), which often require parameterisation during
operation, can therefore be easily implemented.
With the use of this performance class, the parameter values are only rarely changed in comparison to the
cyclic measurement values.
8.3.4 Terminology (selection)
8.3.4.1 Bus parameters
Bus parameters are settings which define the time-related behaviour on the physical PROFIBUS DP. The
following standardised parameters are set in the DP master by means of the configuration tool. In more recent
configuration tools, this is usually carried out automatically:
Name Meaning Value range
TS Master address 0 to 126
Baud rate Transfer rate 10 options
(Section 8.1.2 "Cable material")
T
SL
Slot Time 5
2
2
16
-1 (bit times)
min T
SDR
Smallest Station Delay Responder 2
0
to 2
16
-1 (bit times)
max T
SDR
Largest Station Delay Responder 2
0
to 2
16
-1 (bit times)
T
QUI
Quiet Time 0 to 2
8
-1 (bit times) (standard value =0)
T
SET
Setup Time 2
0
to 2
8
-1 (bit times)
T
TR
Target Rotation Time 2
0
to 2
24
-1 (bit times)
G GAP Update factor (token cycles) 1 to 100 (Standard value = 10)
HSA Highest Station Address 2 to 126 (Standard value = 126)
Max retry limit Maximum retries (number of repeat telegrams) 0 to 8