Communication via PROFIBUS
Acyclic communication
4-135
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
4.4.5 Example 2: write parameters (multi-parameter request)
Requirements
1. The PROFIBUS master has been commissioned and is fully operational.
2. PROFIBUS communication between master and slave is operational.
3. The master can read and write data sets in conformance with
PROFIBUS DPV1.
4. Control type: VECTOR
Task description
Jog 1 and 2 are to be set up for drive 2 via the input terminals of the Control Unit.
A parameter request is to be used to write the corresponding parameters as fol-
lows:
S BI: p1055 = r0722.4 Jog bit 0
S BI: p1056 = r0722.5 Jog bit 1
S p1058 = 300 rpm Jog 1 speed setpoint
S p1059 = 600 rpm Jog 2 speed setpoint
The request is to be handled using a request and response data block.
profibus_para_schreiben.vsd
X132.1
X132.2
r0722.4
r0722.5
DI 5
DI 4
0 0
0 1
1 0
1 1
n_setp_1
Jog setpoint 1
p1058
Jog setpoint 2
p1059
Save setpoint
p1055 [C]
p1056 [C]
+24 V
Main setpoint
722 41
31 ... 16 15 ... 10 9 ... 0
Parameter number
Object
0: Device
1: CU320
63: Wiring to itself
Index number
= 02D2 0404Hex
722 51 = 02D2 0405Hex
Input in BI: p1055 and BI: p1056
Fig. 4-15 Task description for multi-parameter request (example)
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