Siemens ET 757 E Series Betriebsanleitung Seite 96

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Commissioning and optimization (software)
7.4 Commissioning of communication between the S7 CPU and the frequency converter
ET 200pro FC
96 Operating Instructions, 11/2007, A5E01100763B AA
7.4 Commissioning of communication between the S7 CPU and the
frequency converter
7.4.1 Parameter settings for communication
The frequency converter is operated by means of PROFIdrive profile.
Table 7-5 Standard telegram 1
Telegram Function in the drive PZD1 PZD2 PZD3 PZD4
STW1 NSOLL_A 1
(PROFIdrive)
Speed control 2 words
ZSW1 NIST_A
← Receive telegram from
fieldbus
→ Send telegram to fieldbus
STW 1 Control word 1
ZSW 1 Status word 1
NSET_A (P1070) Speed setpoint A (16-bit)
NIST_A (r0021) Speed setpoint A (16-bit)
Fieldbus parameter
The following parameters must be set in order to put the fieldbus interface into operation:
Table 7-6 Fieldbus parameters
Parameter Contents
P0700 Fast selection of command source
P1000 Fast selection of frequency setpoint
P2051 Actual values for process data (BICO)
P2040 Failure time of process data telegram
P0927 Parameter change source
P0700 and P1000 fast selection
The control word and setpoint sources can be selected quickly in parameters P0700 (Select
command source) and P1000 (Select frequency setpoint).
r2050 and P2051 BICO
If process data is interconnected by means of binectors/connectors, much greater
flexibility is offered.
The precise connection of setpoints and actual values from/to the fieldbus interface is
parameterized in r2050 and P2051.
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