Siemens SINAMICS G120 Instructions d'exploitation Page 140

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 304
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 139
Configuring the fieldbus
6.2 Communication via RS485
Inverter with CU240B-2 and CU240E-2 Control Units
138 Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB
6.2.3.1 Setting the address
You can set the inverter's Modbus RTU address using either DIP switches on the Control
Unit or parameter p2021.
Valid Modbus RTU addresses: 1 … 247
Invalid Modbus RTU addresses: 0
If you have specified a valid address using DIP switches, this address will always be the one
that takes effect and p2021 cannot be changed.
If you set all DIP switches to "OFF" (0) or "ON" (1), then p2021 defines the address.
The positions and settings of the DIP switches are described in Section Interfaces,
c
onnectors, switches, terminal blocks and LEDs of the CU (Page 43).
CAUTION
A bus address that has been changed is only effective after the inverter has been switched
off and back on again.
6.2.3.2 Basic settings for communication
Parameter Description
P0015 = 21 Macro drive unit
Selecting the I/O configuration
p2030 = 2 Fieldbus protocol selection
2: Modbus
p2020 Fieldbus baud rate
Baud rates from 4800 bit/s to 187500 bit/s can be set for communication, factory
setting = 19200 bit/s.
p2024 Modbus timing (see Section "Baud rates and mapping tables (Page 140)")
Index 0: Maximum slave telegram processing time:
The time after which the slave must have sent a response to the master.
Index 1: Character delay time:
Character delay time: Maximum permissible delay time between the individual
characters in the Modbus frame. (Modbus standard processing time for 1.5 bytes).
Index2: Inter-telegram delay:
Maximum permissible delay time between Modbus telegrams. (Modbus standard
processing time for 3.5 bytes).
p2029 Fieldbus fault statistics
Displays receive faults on the fieldbus interface
p2040 Process data monitoring time
Determines the time after which an alarm is generated if no process data are
transferred.
Note: This time must be adapted depending on the number of slaves and the baud
rate set for the bus (factory setting = 100 ms).
Vue de la page 139
1 2 ... 135 136 137 138 139 140 141 142 143 144 145 ... 303 304

Commentaires sur ces manuels

Pas de commentaire